rustc 1.91.1 fails to compile on sparc64 with an ICE

[Fabian-Gruenbichler]

Code

./x.py build on Debian unstable on sparc64, building 1.91.1 using the packaged 1.90, ending with:

11:35:07 E:    Compiling core v0.0.0 (/home/fabiang/rust/library/core)
11:35:07 E:      Running `CARGO=/usr/bin/cargo CARGO_CRATE_NAME=core CARGO_MANIFEST_DIR=/home/fabiang/rust/library/core CARGO_MANIFEST_PATH=/home/fabiang/rust/library/core/Cargo.toml CARGO_PKG_AUTHORS='' CARGO_PKG_DESCRIPTION='The Rust Core Library' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='MIT OR Apache-2.0' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=core CARGO_PKG_README='' CARGO_PKG_REPOSITORY='https://github.com/rust-lang/rust.git' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.0.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=0 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 CARGO_SBOM_PATH='' LD_LIBRARY_PATH=/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/release/deps /home/fabiang/rust/build/bootstrap/debug/rustc /home/fabiang/rust/build/bootstrap/debug/rustc --crate-name core --edition=2024 library/core/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no -C debuginfo=2 --warn=unexpected_cfgs --check-cfg 'cfg(no_fp_fmt_parse)' --check-cfg 'cfg(feature, values(any()))' --check-cfg 'cfg(target_has_reliable_f16)' --check-cfg 'cfg(target_has_reliable_f16_math)' --check-cfg 'cfg(target_has_reliable_f128)' --check-cfg 'cfg(target_has_reliable_f128_math)' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("debug_refcell", "optimize_for_size", "panic_immediate_abort"))' -C metadata=4a898a46ceb43292 -C extra-filename=-34317c582148475e --out-dir /home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/sparc64-unknown-linux-gnu/release/deps --target sparc64-unknown-linux-gnu -C linker=sparc64-linux-gnu-gcc -L dependency=/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/sparc64-unknown-linux-gnu/release/deps -L dependency=/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/release/deps -Csymbol-mangling-version=legacy '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/1.91.1/")' -Z binary-dep-depinfo`
11:36:12 E: error: internal compiler error: compiler/rustc_mir_transform/src/validate.rs:80:25: broken MIR in Item(DefId(0:41165 ~ core[ece3]::slice::memchr::memchr_aligned::runtime)) (after phase change to runtime-optimized) at bb6[57]:
11:36:12 E:                                 Cannot Ne compare incompatible types bool and option::Option<usize>
11:36:12 E:   --> library/core/src/slice/memchr.rs:91:24
11:36:12 E:    |
11:36:12 E: 91 |                     if zu || zv {
11:36:12 E:    |                        ^^
11:36:12 E: 
11:36:12 E: 
11:36:12 E: thread 'rustc' panicked at compiler/rustc_mir_transform/src/validate.rs:80:25:
11:36:12 E: Box<dyn Any>
11:36:12 E: stack backtrace:
11:36:15 E:    0: std::panicking::begin_panic::<rustc_errors::ExplicitBug>
11:36:15 E:              at /rustc-dev/1.91.1/library/std/src/panicking.rs:769:5
11:36:15 E:    1: std::panic::panic_any::<rustc_errors::ExplicitBug>
11:36:15 E:              at /rustc-dev/1.91.1/library/std/src/panic.rs:260:5
11:36:15 E:    2: <rustc_errors::diagnostic::BugAbort as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_errors/src/diagnostic.rs:63:9
11:36:15 E:    3: <rustc_errors::diagnostic::Diag<rustc_errors::diagnostic::BugAbort>>::emit
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_errors/src/diagnostic.rs:1405:9
11:36:15 E:    4: <rustc_errors::DiagCtxtHandle>::span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_errors/src/lib.rs:1237:48
11:36:15 E:    5: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>::{closure#0}
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/util/bug.rs:38:54
11:36:15 E:    6: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/ty/context/tls.rs:136:23
11:36:15 E:    7: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_opt<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/ty/context/tls.rs:79:18
11:36:15 E:    8: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/ty/context/tls.rs:134:5
11:36:15 E:    9: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/util/bug.rs:33:5
11:36:15 E:   10: rustc_middle::util::bug::span_bug_fmt::<rustc_span::span_encoding::Span>
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/util/bug.rs:24:5
11:36:15 E:   11: <rustc_mir_transform::validate::CfgChecker>::fail::<alloc::string::String>
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/validate.rs:122:13
11:36:15 E:   12: <rustc_mir_transform::validate::Validator as rustc_mir_transform::pass_manager::MirPass>::run_pass
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/validate.rs:80:25
11:36:15 E:   13: rustc_mir_transform::pass_manager::validate_body
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/pass_manager.rs:352:34
11:36:15 E:   14: rustc_mir_transform::pass_manager::run_passes_inner
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/pass_manager.rs:341:13
11:36:15 E:   15: rustc_mir_transform::pass_manager::run_passes
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/pass_manager.rs:210:5
11:36:15 E:   16: rustc_mir_transform::run_optimization_passes
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/lib.rs:668:5
11:36:15 E:   17: rustc_mir_transform::inner_optimized_mir
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/lib.rs:787:5
11:36:15 E:   18: rustc_mir_transform::optimized_mir
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/lib.rs:745:21
11:36:15 E:   19: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
11:36:15 E:              at /rustc-dev/1.91.1/compiler/rustc_query_impl/src/plumbing.rs:298:13
11:36:16 E:       [... omitted 22 frames ...]
11:36:16 E:   20: <rustc_middle::ty::context::TyCtxt>::instance_mir
11:36:16 E:   21: rustc_mir_transform::inline::try_instance_mir
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/inline.rs:1378:12
11:36:16 E:   22: rustc_mir_transform::inline::try_inlining::<rustc_mir_transform::inline::NormalInliner>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/inline.rs:625:23
11:36:16 E:   23: rustc_mir_transform::inline::process_blocks::<rustc_mir_transform::inline::NormalInliner>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/inline.rs:532:15
11:36:16 E:   24: rustc_mir_transform::inline::inline::<rustc_mir_transform::inline::NormalInliner>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/inline.rs:510:5
11:36:16 E:   25: <rustc_mir_transform::inline::Inline as rustc_mir_transform::pass_manager::MirPass>::run_pass
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/inline.rs:64:12
11:36:16 E:   26: rustc_mir_transform::pass_manager::run_passes_inner
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/pass_manager.rs:308:22
11:36:16 E:   27: rustc_mir_transform::pass_manager::run_passes
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/pass_manager.rs:210:5
11:36:16 E:   28: rustc_mir_transform::run_optimization_passes
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/lib.rs:668:5
11:36:16 E:   29: rustc_mir_transform::inner_optimized_mir
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/lib.rs:787:5
11:36:16 E:   30: rustc_mir_transform::optimized_mir
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/lib.rs:745:21
11:36:16 E:   31: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_query_impl/src/plumbing.rs:298:13
11:36:16 E:       [... omitted 22 frames ...]
11:36:16 E:   32: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefIdCache<rustc_middle::query::erase::Erased<[u8; 8]>>>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/query/plumbing.rs:182:17
11:36:16 E:   33: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/query/plumbing.rs:475:31
11:36:16 E:   34: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/query/plumbing.rs:466:35
11:36:16 E:   35: rustc_mir_transform::cross_crate_inline::cross_crate_inlinable
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_mir_transform/src/cross_crate_inline.rs:95:19
11:36:16 E:   36: rustc_query_impl::query_impl::cross_crate_inlinable::dynamic_query::{closure#2}::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_query_impl/src/plumbing.rs:298:13
11:36:16 E:       [... omitted 22 frames ...]
11:36:16 E:   37: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefIdCache<rustc_middle::query::erase::Erased<[u8; 1]>>>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/query/plumbing.rs:182:17
11:36:16 E:   38: <rustc_middle::query::plumbing::TyCtxtAt>::cross_crate_inlinable::<rustc_span::def_id::DefId>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/query/plumbing.rs:475:31
11:36:16 E:   39: <rustc_middle::ty::context::TyCtxt>::cross_crate_inlinable::<rustc_span::def_id::DefId>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/query/plumbing.rs:466:35
11:36:16 E:   40: rustc_passes::reachable::recursively_reachable
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_passes/src/reachable.rs:46:16
11:36:16 E:   41: <rustc_passes::reachable::ReachableContext>::is_recursively_reachable_local
11:36:16 E:   42: <rustc_passes::reachable::ReachableContext>::propagate_item
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_passes/src/reachable.rs:358:25
11:36:16 E:   43: <rustc_passes::reachable::ReachableContext as rustc_hir::intravisit::Visitor>::visit_expr
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_passes/src/reachable.rs:99:18
11:36:16 E:   44: rustc_hir::intravisit::walk_expr::<rustc_passes::reachable::ReachableContext>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_hir/src/intravisit.rs:835:32
11:36:16 E:   45: rustc_hir::intravisit::walk_expr::<rustc_passes::reachable::ReachableContext>
11:36:16 E:   46: <rustc_passes::reachable::ReachableContext as rustc_hir::intravisit::Visitor>::visit_body
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_hir/src/intravisit.rs:309:9
11:36:16 E:   47: <rustc_passes::reachable::ReachableContext as rustc_hir::intravisit::Visitor>::visit_nested_body
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_passes/src/reachable.rs:70:14
11:36:16 E:   48: <rustc_passes::reachable::ReachableContext>::propagate_node
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_passes/src/reachable.rs:203:34
11:36:16 E:   49: <rustc_passes::reachable::ReachableContext>::propagate
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_passes/src/reachable.rs:173:18
11:36:16 E:   50: rustc_passes::reachable::reachable_set
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_passes/src/reachable.rs:496:23
11:36:16 E:   51: rustc_query_impl::query_impl::reachable_set::dynamic_query::{closure#2}::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_query_impl/src/plumbing.rs:294:9
11:36:16 E:       [... omitted 22 frames ...]
11:36:16 E:   52: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 8]>>>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/query/plumbing.rs:182:17
11:36:16 E:   53: <rustc_middle::query::plumbing::TyCtxtAt>::reachable_set
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/query/plumbing.rs:475:31
11:36:16 E:   54: <rustc_middle::ty::context::TyCtxt>::reachable_set
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/query/plumbing.rs:466:35
11:36:16 E:   55: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_metadata/src/rmeta/encoder.rs:1770:33
11:36:16 E:   56: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_metadata/src/rmeta/encoder.rs:653:34
11:36:16 E:   57: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_metadata/src/rmeta/encoder.rs:614:27
11:36:16 E:   58: rustc_metadata::rmeta::encoder::encode_metadata::{closure#3}::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_metadata/src/rmeta/encoder.rs:2425:32
11:36:16 E:   59: rustc_metadata::rmeta::encoder::with_encode_metadata_header::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#3}::{closure#0}>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_metadata/src/rmeta/encoder.rs:2482:25
11:36:16 E:   60: rustc_metadata::rmeta::encoder::encode_metadata::{closure#3}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_metadata/src/rmeta/encoder.rs:2422:13
11:36:16 E:   61: <rustc_metadata::rmeta::encoder::encode_metadata::{closure#3} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, &std::path::Path)>>::call_once
11:36:16 E:              at /rustc-dev/1.91.1/library/core/src/ops/function.rs:253:5
11:36:16 E:   62: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::DepsType>>::with_task::<rustc_middle::ty::context::TyCtxt, &std::path::Path, ()>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_query_system/src/dep_graph/graph.rs:274:22
11:36:16 E:   63: rustc_metadata::rmeta::encoder::encode_metadata
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_metadata/src/rmeta/encoder.rs:2417:19
11:36:16 E:   64: rustc_metadata::fs::encode_and_write_metadata
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_metadata/src/fs.rs:58:9
11:36:16 E:   65: rustc_interface::passes::start_codegen
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_interface/src/passes.rs:1235:20
11:36:16 E:   66: <rustc_interface::queries::Linker>::codegen_and_build_linker
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_interface/src/queries.rs:32:43
11:36:16 E:   67: rustc_driver_impl::run_compiler::{closure#0}::{closure#2}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_driver_impl/src/lib.rs:387:18
11:36:16 E:   68: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_interface/src/passes.rs:1017:27
11:36:16 E:   69: <rustc_middle::ty::context::GlobalCtxt>::enter::<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/ty/context.rs:1619:37
11:36:16 E:   70: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/ty/context/tls.rs:60:9
11:36:16 E:   71: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
11:36:16 E:              at /rustc-dev/1.91.1/library/std/src/thread/local.rs:315:12
11:36:16 E:   72: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
11:36:16 E:              at /rustc-dev/1.91.1/library/std/src/thread/local.rs:279:20
11:36:16 E:   73: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/ty/context/tls.rs:57:9
11:36:16 E:   74: <rustc_middle::ty::context::GlobalCtxt>::enter::<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/ty/context.rs:1619:9
11:36:16 E:   75: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_middle/src/ty/context.rs:1824:13
11:36:16 E:   76: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_interface/src/passes.rs:984:9
11:36:16 E:   77: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
11:36:16 E:              at /rustc-dev/1.91.1/library/core/src/ops/function.rs:253:5
11:36:16 E:   78: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
11:36:16 E:              at /rustc-dev/1.91.1/library/alloc/src/boxed.rs:1971:9
11:36:16 E:   79: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_interface/src/passes.rs:1025:5
11:36:16 E:   80: rustc_driver_impl::run_compiler::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_driver_impl/src/lib.rs:344:22
11:36:16 E:   81: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_interface/src/interface.rs:531:80
11:36:16 E:   82: <core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
11:36:16 E:              at /rustc-dev/1.91.1/library/core/src/panic/unwind_safe.rs:272:9
11:36:16 E:   83: std::panicking::catch_unwind::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}>, ()>
11:36:16 E:              at /rustc-dev/1.91.1/library/std/src/panicking.rs:589:40
11:36:16 E:   84: std::panicking::catch_unwind::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}>>
11:36:16 E:              at /rustc-dev/1.91.1/library/std/src/panicking.rs:552:19
11:36:16 E:   85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}>, ()>
11:36:16 E:              at /rustc-dev/1.91.1/library/std/src/panic.rs:359:14
11:36:16 E:   86: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_interface/src/interface.rs:531:23
11:36:16 E:   87: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_interface/src/util.rs:201:17
11:36:16 E:   88: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_interface/src/util.rs:155:24
11:36:16 E:   89: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
11:36:16 E:              at /rust/deps/scoped-tls-1.0.1/src/lib.rs:137:9
11:36:16 E:   90: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_span/src/lib.rs:146:21
11:36:16 E:   91: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}
11:36:16 E:              at /rustc-dev/1.91.1/compiler/rustc_interface/src/util.rs:151:17
11:36:16 E: note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
11:36:16 E: 
11:36:16 E: note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
11:36:16 E: 
11:36:16 E: note: please make sure that you have updated to the latest nightly
11:36:16 E: 
11:36:16 E: note: please attach the file at `/home/fabiang/rust/rustc-ice-2025-12-17T11_35_01-3694533.txt` to your bug report
11:36:16 E: 
11:36:16 E: note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -C debuginfo=2 -C linker=sparc64-linux-gnu-gcc -C symbol-mangling-version=legacy -Z unstable-options -Z macro-backtrace -C split-debuginfo=off -C prefer-dynamic -Z inline-mir -Z inline-mir-preserve-debug -Z mir_strip_debuginfo=locals-in-tiny-functions -C embed-bitcode=yes -Z unstable-options -C force-frame-pointers=non-leaf -Z crate-attr=doc(html_root_url="https://doc.rust-lang.org/1.91.1/") -Z binary-dep-depinfo -Z force-unstable-if-unmarked
11:36:16 E: 
11:36:16 E: note: some of the compiler flags provided by cargo are hidden
11:36:16 E: 
11:36:16 E: query stack during panic:
11:36:16 E: #0 [optimized_mir] optimizing MIR for `slice::memchr::memchr_aligned::runtime`
11:36:16 E: #1 [optimized_mir] optimizing MIR for `slice::memchr::memchr_aligned`
11:36:16 E: #2 [cross_crate_inlinable] whether the item should be made inlinable across crates
11:36:16 E: #3 [reachable_set] reachability
11:36:16 E: end of query stack
11:36:17 O: 
11:36:17 E: error: could not compile `core` (lib)
11:36:17 O: Did not run successfully: exit status: 101
11:36:17 E: 
11:36:17 E: Caused by:
11:36:17 O: LD_LIBRARY_PATH="/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1/lib:/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/release/deps" RUST_BACKTRACE="1" "/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1/bin/rustc" "--crate-name" "core" "--edition=2024" "library/core/src/lib.rs" "--error-format=json" "--json=diagnostic-rendered-ansi,artifacts,future-incompat" "--crate-type" "lib" "--emit=dep-info,metadata,link" "-C" "opt-level=3" "-C" "embed-bitcode=no" "-C" "debuginfo=2" "--warn=unexpected_cfgs" "--check-cfg" "cfg(no_fp_fmt_parse)" "--check-cfg" "cfg(feature, values(any()))" "--check-cfg" "cfg(target_has_reliable_f16)" "--check-cfg" "cfg(target_has_reliable_f16_math)" "--check-cfg" "cfg(target_has_reliable_f128)" "--check-cfg" "cfg(target_has_reliable_f128_math)" "--check-cfg" "cfg(docsrs,test)" "--check-cfg" "cfg(feature, values(\"debug_refcell\", \"optimize_for_size\", \"panic_immediate_abort\"))" "-C" "metadata=4a898a46ceb43292" "-C" "extra-filename=-34317c582148475e" "--out-dir" "/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/sparc64-unknown-linux-gnu/release/deps" "--target" "sparc64-unknown-linux-gnu" "-C" "linker=sparc64-linux-gnu-gcc" "-L" "dependency=/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/sparc64-unknown-linux-gnu/release/deps" "-L" "dependency=/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/release/deps" "-Csymbol-mangling-version=legacy" "--check-cfg=cfg(feature,values(any()))" "-Zunstable-options" "-Zmacro-backtrace" "-Csplit-debuginfo=off" "-Cprefer-dynamic" "-Zinline-mir" "-Zinline-mir-preserve-debug" "-Zmir_strip_debuginfo=locals-in-tiny-functions" "-Alinker-messages" "-Cembed-bitcode=yes" "-Zunstable-options" "-Cforce-frame-pointers=non-leaf" "-Zcrate-attr=doc(html_root_url=\"https://doc.rust-lang.org/1.91.1/\")" "-Z" "binary-dep-depinfo" "-Wrust_2018_idioms" "-Wunused_lifetimes" "--sysroot" "/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1" "--remap-path-prefix" "/home/fabiang/rust=/rustc/1.91.1" "--remap-path-prefix" "/home/fabiang/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f=/rust/deps" "-Z" "force-unstable-if-unmarked"
11:36:17 O: -------------
11:36:17 E:   process didn't exit successfully: `CARGO=/usr/bin/cargo CARGO_CRATE_NAME=core CARGO_MANIFEST_DIR=/home/fabiang/rust/library/core CARGO_MANIFEST_PATH=/home/fabiang/rust/library/core/Cargo.toml CARGO_PKG_AUTHORS='' CARGO_PKG_DESCRIPTION='The Rust Core Library' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='MIT OR Apache-2.0' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=core CARGO_PKG_README='' CARGO_PKG_REPOSITORY='https://github.com/rust-lang/rust.git' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.0.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=0 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 CARGO_SBOM_PATH='' LD_LIBRARY_PATH=/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/release/deps /home/fabiang/rust/build/bootstrap/debug/rustc /home/fabiang/rust/build/bootstrap/debug/rustc --crate-name core --edition=2024 library/core/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no -C debuginfo=2 --warn=unexpected_cfgs --check-cfg 'cfg(no_fp_fmt_parse)' --check-cfg 'cfg(feature, values(any()))' --check-cfg 'cfg(target_has_reliable_f16)' --check-cfg 'cfg(target_has_reliable_f16_math)' --check-cfg 'cfg(target_has_reliable_f128)' --check-cfg 'cfg(target_has_reliable_f128_math)' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("debug_refcell", "optimize_for_size", "panic_immediate_abort"))' -C metadata=4a898a46ceb43292 -C extra-filename=-34317c582148475e --out-dir /home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/sparc64-unknown-linux-gnu/release/deps --target sparc64-unknown-linux-gnu -C linker=sparc64-linux-gnu-gcc -L dependency=/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/sparc64-unknown-linux-gnu/release/deps -L dependency=/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std/release/deps -Csymbol-mangling-version=legacy '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/1.91.1/")' -Z binary-dep-depinfo` (exit status: 101)
11:36:17 E: command did not execute successfully: cd "/home/fabiang/rust" && env -u MAKEFLAGS -u MFLAGS AR_sparc64_unknown_linux_gnu="ar" CARGO_BUILD_BUILD_DIR="/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std" CARGO_INCREMENTAL="0" CARGO_LOG="cargo::core::compiler::fingerprint=info" CARGO_PROFILE_RELEASE_DEBUG="2" CARGO_PROFILE_RELEASE_DEBUG_ASSERTIONS="false" CARGO_PROFILE_RELEASE_OVERFLOW_CHECKS="false" CARGO_PROFILE_RELEASE_STRIP="false" CARGO_TARGET_DIR="/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1-std" CARGO_TARGET_SPARC64_UNKNOWN_LINUX_GNU_LINKER="sparc64-linux-gnu-gcc" CC_sparc64_unknown_linux_gnu="cc" CFG_COMPILER_BUILD_TRIPLE="sparc64-unknown-linux-gnu" CFG_COMPILER_HOST_TRIPLE="sparc64-unknown-linux-gnu" CFG_DISABLE_UNSTABLE_FEATURES="1" CFG_RELEASE_CHANNEL="stable" CFLAGS_sparc64_unknown_linux_gnu="" CXXFLAGS_sparc64_unknown_linux_gnu="" CXX_sparc64_unknown_linux_gnu="c++" LIBC_CHECK_CFG="1" RANLIB_sparc64_unknown_linux_gnu="ar s" REAL_LIBRARY_PATH_VAR="LD_LIBRARY_PATH" RUSTBUILD_NATIVE_DIR="/home/fabiang/rust/build/sparc64-unknown-linux-gnu/native" RUSTC="/home/fabiang/rust/build/bootstrap/debug/rustc" RUSTC_BACKTRACE_ON_ICE="1" RUSTC_BOOTSTRAP="1" RUSTC_BREAK_ON_ICE="1" RUSTC_CARGO_REGISTRY_SRC_TO_REMAP="/home/fabiang/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f=/rust/deps" RUSTC_DEBUGINFO_MAP="/home/fabiang/rust=/rustc/1.91.1" RUSTC_ERROR_METADATA_DST="/home/fabiang/rust/build/tmp/extended-error-metadata" RUSTC_FORCE_UNSTABLE="1" RUSTC_HOST_FLAGS="-Clinker=sparc64-linux-gnu-gcc" RUSTC_INSTALL_BINDIR="bin" RUSTC_LIBDIR="/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1/lib" RUSTC_LINK_STD_INTO_RUSTC_DRIVER="1" RUSTC_LINT_FLAGS="-Wrust_2018_idioms -Wunused_lifetimes" RUSTC_REAL="/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1/bin/rustc" RUSTC_SNAPSHOT="/usr/bin/rustc" RUSTC_SNAPSHOT_LIBDIR="/usr/lib" RUSTC_STAGE="1" RUSTC_SYSROOT="/home/fabiang/rust/build/sparc64-unknown-linux-gnu/stage1" RUSTC_VERBOSE="2" RUSTC_WRAPPER="/home/fabiang/rust/build/bootstrap/debug/rustc" RUSTDOC="/home/fabiang/rust/build/bootstrap/debug/rustdoc" RUSTDOCFLAGS="-Csymbol-mangling-version=legacy --check-cfg=cfg(feature,values(any())) -Zunstable-options -Wrustdoc::invalid_codeblock_attributes --crate-version 1.91.1 -Clinker=sparc64-linux-gnu-gcc -Zcrate-attr=doc(html_root_url=\"https://doc.rust-lang.org/1.91.1/\") -Zcrate-attr=warn(rust_2018_idioms)" RUSTDOC_REAL="/path/to/nowhere/rustdoc/not/required" RUSTFLAGS="-Csymbol-mangling-version=legacy --check-cfg=cfg(feature,values(any())) -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf -Zcrate-attr=doc(html_root_url=\"https://doc.rust-lang.org/1.91.1/\")" RUST_TEST_THREADS="48" WINAPI_NO_BUNDLED_LIBRARIES="1" __CARGO_DEFAULT_LIB_METADATA="stablestd1.91.1" "/usr/bin/cargo" "build" "--target" "sparc64-unknown-linux-gnu" "-Zbinary-dep-depinfo" "-j" "48" "-Zroot-dir=/home/fabiang/rust" "-v" "-v" "--release" "--features" "backtrace panic-unwind" "--manifest-path" "/home/fabiang/rust/library/sysroot/Cargo.toml" "-p" "alloc" "-p" "compiler_builtins" "-p" "core" "-p" "panic_abort" "-p" "panic_unwind" "-p" "proc_macro" "-p" "rustc-std-workspace-core" "-p" "std" "-p" "std_detect" "-p" "sysroot" "-p" "test" "-p" "unwind" "--message-format" "json-render-diagnostics" (failure_mode=Exit)
11:36:17 E: expected success, got: exit status: 101
11:36:17 E: Traceback (most recent call last):
11:36:17 E:   File "/home/fabiang/rust/./x.py", line 53, in <module>
11:36:17 E:     bootstrap.main()
11:36:17 E:     ~~~~~~~~~~~~~~^^
11:36:17 E:   File "/home/fabiang/rust/src/bootstrap/bootstrap.py", line 1389, in main
11:36:17 E:     bootstrap(args)
11:36:17 E:     ~~~~~~~~~^^^^^^
11:36:17 E:   File "/home/fabiang/rust/src/bootstrap/bootstrap.py", line 1364, in bootstrap
11:36:17 E:     run(args, env=env, verbose=build.verbose, is_bootstrap=True)
11:36:17 E:     ~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
11:36:17 E:   File "/home/fabiang/rust/src/bootstrap/bootstrap.py", line 237, in run
11:36:17 E:     raise RuntimeError(err)
11:36:17 E: RuntimeError: failed to run: /home/fabiang/rust/build/bootstrap/debug/bootstrap build
11:36:17 I: Finished with exitcode 1

Meta

rustc --version --verbose:

rustc 1.90.0 (1159e78c4 2025-09-14) (built from a source tarball)
binary: rustc
commit-hash: 1159e78c4747b02ef996e55082b704c09b970588
commit-date: 2025-09-14
host: sparc64-unknown-linux-gnu
release: 1.90.0
LLVM version: 19.1.7

bootstrap.toml:

change-id = 146435

[build]
submodules = true
vendor = false
locked-deps = false
verbose = 2
profiler = false

rustc = "/usr/bin/rustc"
cargo = "/usr/bin/cargo"

build = "sparc64-unknown-linux-gnu"
host = ["sparc64-unknown-linux-gnu"]
target = ["sparc64-unknown-linux-gnu"]

#full-bootstrap = true
# originally needed to work around #45317 but no longer necessary
# currently we have to omit it because it breaks #48319

# this might get changed later by override_dh_auto_configure-indep
# we do it this way to avoid spurious rebuilds
docs = false

extended = true
tools = [
  "cargo",
  "clippy",
  "rust-analyzer",
  "rust-analyzer-proc-macro-srv",
  "rustdoc",
  "rustfmt",
  "wasm-component-ld",
]

optimized-compiler-builtins = false

[install]
prefix = "/usr"

[target.sparc64-unknown-linux-gnu]
llvm-config = "/usr/lib/llvm-21/bin/llvm-config"
linker = "sparc64-linux-gnu-gcc"


[target.wasm32-wasip1]
llvm-config = "/usr/lib/llvm-21/bin/llvm-config"
wasi-root = "/usr"
profiler = false
[target.wasm32-wasip2]
llvm-config = "/usr/lib/llvm-21/bin/llvm-config"
wasi-root = "/usr"
profiler = false
[target.wasm32-unknown-unknown]
llvm-config = "/usr/lib/llvm-21/bin/llvm-config"
profiler = false

[llvm]
link-shared = true
download-ci-llvm = false
ninja = false

[rust]
download-rustc = false
jemalloc = false
optimize = true
dist-src = false
lld = false

channel = "stable"

# parallel codegen interferes with reproducibility, see
# https://github.com/rust-lang/rust/issues/34902#issuecomment-319463586
#codegen-units = 0
debuginfo-level = 2
debuginfo-level-std = 2
rpath = false
# see also d-custom-debuginfo-path.patch
remap-debuginfo = true

omit-git-hash = true
verbose-tests = true
backtrace-on-ice = true

deny-warnings = false

Error output

<output>

Backtrace

see attached rustc-ice report

rustc-ice-2025-12-17T11_35_01-3694533.txt

[Fabian-Gruenbichler]

I will try with LLVM 19 next, if that also fails I will bisect towards the start of the regression (1.90 with LLVM 19 still built fine)

[Fabian-Gruenbichler]

1.91.0 with LLVM 19 has the same symptoms, I will bisect now..

[workingjubilee]

So, your initial report is against

rustc 1.90.0 (1159e78c4 2025-09-14) (built from a source tarball)
binary: rustc
commit-hash: 1159e78c4747b02ef996e55082b704c09b970588
commit-date: 2025-09-14
host: sparc64-unknown-linux-gnu
release: 1.90.0
LLVM version: 19.1.7

And you seem to be building rustc 1.91 using LLVM 21? We would have started preparing to drop LLVM 19 support then, even if it was retained for that version. What about LLVM 20?

EDIT: apologies, mistracked a version while reading your thing.

[saethlin]

The failure mode here is so strange that I wonder if the compiler is miscompiled. Bisection might get weird if that's the case.

The other hypothesis is that a MIR transform is weirdly buggy (though I struggle to see why it would only be buggy on sparc64). If you are able to set RUSTFLAGS=-Zvalidate-mir during the build, the ICE message should change from saying "after phase change" to "after pass", and that would call out the offending pass. MIR validation is a bit expensive, so by default it is only run at a few points. The flag makes it run after every pass.

[Fabian-Gruenbichler]

So, your initial report is against

rustc 1.90.0 (1159e78c4 2025-09-14) (built from a source tarball)
binary: rustc
commit-hash: 1159e78c4747b02ef996e55082b704c09b970588
commit-date: 2025-09-14
host: sparc64-unknown-linux-gnu
release: 1.90.0
LLVM version: 19.1.7

And you seem to be building rustc 1.91 using LLVM 21? We would have started preparing to drop LLVM 19 support then, even if it was retained for that version. What about LLVM 20?

EDIT: apologies, mistracked a version while reading your thing.

yes, 1.90 in Debian unstable is built with LLVM 19, and 1.91 (which I am currently preparing) switches to 21. Debian skipped 20 for $reasons, and 21 wasn't very stable there until recently, which is why I only switched over now.

upstream 1.91 was the first rustc release defaulting to LLVM 21, and 1.92.0 is the first one dropping support for 19. although I had to work around some changes on loong already to keep 19 working before that ;)

[Fabian-Gruenbichler]

The failure mode here is so strange that I wonder if the compiler is miscompiled. Bisection might get weird if that's the case.

The other hypothesis is that a MIR transform is weirdly buggy (though I struggle to see why it would only be buggy on sparc64). If you are able to set RUSTFLAGS=-Zvalidate-mir during the build, the ICE message should change from saying "after phase change" to "after pass", and that would call out the offending pass. MIR validation is a bit expensive, so by default it is only run at a few points. The flag makes it run after every pass.

well, it at least consistently fails for 1.91.1 and 1.91.0, and the latter also if using LLVM 19 for the to-be-built compiler. and it consistenly works when compiling 1.90.

I can kick of a build of 1.91.0 using that RUSTFLAGS setting and will report back

[workingjubilee]

LLVM 20 changed the alignment of sparc64's 128-bit integers, which we use a significant amount of in the compiler. We have been using the higher alignment since 1.84, but detecting LLVMs before 20 and implementing "back-compat" for them: #132422

Not saying that is guaranteed to be the issue, but it's what my instincts say.

[Fabian-Gruenbichler]

build of 1.91.0 with LLVM 19 with RUSTFLAGS=-Zvalidate-mir set:

...
00:16:54 O: Building stage1 library artifacts{alloc, compiler_builtins, core, panic_abort, panic_unwind, proc_macro, rustc-std-workspace-core, std, std_detect, sysroot, test, unwind} (stage1 -> stage1, sparc64-unknown-linux-gnu)
00:16:55 E:    Compiling compiler_builtins v0.1.160 (/home/fabiang/rust-test/library/compiler-builtins/compiler-builtins)
00:16:55 E:    Compiling core v0.0.0 (/home/fabiang/rust-test/library/core)
00:16:55 E:    Compiling libc v0.2.175
00:16:55 E:    Compiling object v0.37.3
00:16:55 E:    Compiling std v0.0.0 (/home/fabiang/rust-test/library/std)
00:18:27 E: error: internal compiler error: compiler/rustc_mir_transform/src/validate.rs:80:25: broken MIR in Item(DefId(0:17572 ~ core[aebe]::num::flt2dec::decoder::{impl#12}::eq)) (after pass EarlyOtherwiseBranch) at bb1[0]:
00:18:27 E:                                 Cannot Ne compare incompatible types isize and bool
00:18:27 E:    --> library/core/src/num/flt2dec/decoder.rs:30:30
00:18:27 E:     |
00:18:27 E:  30 |   #[derive(Copy, Clone, Debug, PartialEq, Eq)]
00:18:27 E:     |                                ^^^^^^^^^ in this derive macro expansion
00:18:27 E:     |
00:18:27 E:    ::: library/core/src/cmp.rs:274:1
00:18:27 E:     |
00:18:27 E: 274 | / pub macro PartialEq($item:item) {
00:18:27 E: 275 | |     /* compiler built-in */
00:18:27 E: 276 | | }
00:18:27 E:     | |_- in this expansion of `#[derive(PartialEq)]`
00:18:27 E: 
00:18:27 E: 
00:18:27 E: thread 'rustc' panicked at compiler/rustc_mir_transform/src/validate.rs:80:25:
00:18:27 E: Box<dyn Any>

00:18:27 E: stack backtrace:
00:18:30 E:    0: std::panicking::begin_panic::<rustc_errors::ExplicitBug>
00:18:30 E:              at /rustc-dev/1.91.0/library/std/src/panicking.rs:769:5
00:18:30 E:    1: std::panic::panic_any::<rustc_errors::ExplicitBug>
00:18:30 E:              at /rustc-dev/1.91.0/library/std/src/panic.rs:260:5
00:18:30 E:    2: <rustc_errors::diagnostic::BugAbort as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_errors/src/diagnostic.rs:63:9
00:18:30 E:    3: <rustc_errors::diagnostic::Diag<rustc_errors::diagnostic::BugAbort>>::emit
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_errors/src/diagnostic.rs:1405:9
00:18:30 E:    4: <rustc_errors::DiagCtxtHandle>::span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_errors/src/lib.rs:1237:48
00:18:30 E:    5: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>::{closure#0}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/util/bug.rs:38:54
00:18:30 E:    6: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context/tls.rs:136:23
00:18:30 E:    7: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_opt<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context/tls.rs:79:18
00:18:30 E:    8: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context/tls.rs:134:5
00:18:30 E:    9: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/util/bug.rs:33:5
00:18:30 E:   10: rustc_middle::util::bug::span_bug_fmt::<rustc_span::span_encoding::Span>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/util/bug.rs:24:5
00:18:30 E:   11: <rustc_mir_transform::validate::CfgChecker>::fail::<alloc::string::String>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/validate.rs:122:13
00:18:30 E:   12: <rustc_mir_transform::validate::Validator as rustc_mir_transform::pass_manager::MirPass>::run_pass
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/validate.rs:80:25
00:18:30 E:   13: rustc_mir_transform::pass_manager::validate_body
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/pass_manager.rs:352:34
00:18:30 E:   14: rustc_mir_transform::pass_manager::run_passes_inner
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/pass_manager.rs:316:17
00:18:30 E:   15: rustc_mir_transform::pass_manager::run_passes
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/pass_manager.rs:210:5
00:18:30 E:   16: rustc_mir_transform::run_optimization_passes
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:668:5
00:18:30 E:   17: rustc_mir_transform::inner_optimized_mir
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:787:5
00:18:30 E:   18: rustc_mir_transform::optimized_mir
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:745:21
00:18:30 E:   19: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_query_impl/src/plumbing.rs:298:13
00:18:30 E:       [... omitted 22 frames ...]
00:18:30 E:   20: <rustc_middle::ty::context::TyCtxt>::instance_mir
00:18:30 E:   21: rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1134:21
00:18:30 E:   22: <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners::<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/hir/map.rs:340:79
00:18:30 E:   23: rustc_data_structures::sync::parallel::par_for_each_in::<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:181:30
00:18:30 E:   24: <core::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
00:18:30 E:              at /rustc-dev/1.91.0/library/core/src/panic/unwind_safe.rs:272:9
00:18:30 E:   25: std::panicking::catch_unwind::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>, ()>
00:18:30 E:              at /rustc-dev/1.91.0/library/std/src/panicking.rs:589:40
00:18:30 E:   26: std::panicking::catch_unwind::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>>
00:18:30 E:              at /rustc-dev/1.91.0/library/std/src/panicking.rs:552:19
00:18:30 E:   27: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>, ()>
00:18:30 E:              at /rustc-dev/1.91.0/library/std/src/panic.rs:359:14
00:18:30 E:   28: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:23:9
00:18:30 E:   29: rustc_data_structures::sync::parallel::par_for_each_in::<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:181:23
00:18:30 E:   30: <core::slice::iter::Iter<rustc_span::def_id::LocalDefId> as core::iter::traits::iterator::Iterator>::for_each::<rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}>
00:18:30 E:              at /rustc-dev/1.91.0/library/core/src/slice/iter/macros.rs:277:21
00:18:30 E:   31: rustc_data_structures::sync::parallel::par_for_each_in::<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:180:27
00:18:30 E:   32: rustc_data_structures::sync::parallel::parallel_guard::<(), rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
00:18:30 E:   33: rustc_data_structures::sync::parallel::par_for_each_in::<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:175:5
00:18:30 E:   34: <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners::<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/hir/map.rs:340:9
00:18:30 E:   35: rustc_interface::passes::run_required_analyses::{closure#4}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1133:17
00:18:30 E:   36: <rustc_data_structures::profiling::VerboseTimingGuard>::run::<(), rustc_interface::passes::run_required_analyses::{closure#4}>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/profiling.rs:844:9
00:18:30 E:   37: <rustc_session::session::Session>::time::<(), rustc_interface::passes::run_required_analyses::{closure#4}>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_session/src/utils.rs:17:50
00:18:30 E:   38: rustc_interface::passes::run_required_analyses
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1132:14
00:18:30 E:   39: rustc_interface::passes::analysis
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1143:5
00:18:30 E:   40: rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_query_impl/src/plumbing.rs:294:9
00:18:30 E:       [... omitted 22 frames ...]
00:18:30 E:   41: rustc_middle::query::plumbing::query_ensure::<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/query/plumbing.rs:198:9
00:18:30 E:   42: <rustc_middle::query::plumbing::TyCtxtEnsureOk>::analysis
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/query/plumbing.rs:233:9
00:18:30 E:   43: rustc_driver_impl::run_compiler::{closure#0}::{closure#2}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_driver_impl/src/lib.rs:371:29
00:18:30 E:   44: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1017:27
00:18:30 E:   45: <rustc_middle::ty::context::GlobalCtxt>::enter::<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context.rs:1619:37
00:18:30 E:   46: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context/tls.rs:60:9
00:18:30 E:   47: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
00:18:30 E:              at /rustc-dev/1.91.0/library/std/src/thread/local.rs:315:12
00:18:30 E:   48: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
00:18:30 E:              at /rustc-dev/1.91.0/library/std/src/thread/local.rs:279:20
00:18:30 E:   49: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context/tls.rs:57:9
00:18:30 E:   50: <rustc_middle::ty::context::GlobalCtxt>::enter::<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context.rs:1619:9
00:18:30 E:   51: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context.rs:1824:13
00:18:30 E:   52: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}
00:18:30 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:984:9
00:18:30 E:   53: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
00:18:30 E:              at /rustc-dev/1.91.0/library/core/src/ops/function.rs:253:5
00:18:31 E:   54: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
00:18:31 E:              at /rustc-dev/1.91.0/library/alloc/src/boxed.rs:1971:9
00:18:31 E:   55: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
00:18:31 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1025:5
00:18:31 E:   56: rustc_driver_impl::run_compiler::{closure#0}
00:18:31 E:              at /rustc-dev/1.91.0/compiler/rustc_driver_impl/src/lib.rs:344:22
00:18:31 E:   57: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}
00:18:31 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/interface.rs:531:80
00:18:31 E:   58: <core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
00:18:31 E:              at /rustc-dev/1.91.0/library/core/src/panic/unwind_safe.rs:272:9
00:18:31 E:   59: std::panicking::catch_unwind::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}>, ()>
00:18:31 E:              at /rustc-dev/1.91.0/library/std/src/panicking.rs:589:40
00:18:31 E:   60: std::panicking::catch_unwind::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}>>
00:18:31 E:              at /rustc-dev/1.91.0/library/std/src/panicking.rs:552:19
00:18:31 E:   61: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}>, ()>
00:18:31 E:              at /rustc-dev/1.91.0/library/std/src/panic.rs:359:14
00:18:31 E:   62: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
00:18:31 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/interface.rs:531:23
00:18:31 E:   63: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}
00:18:31 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/util.rs:201:17
00:18:31 E:   64: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}
00:18:31 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/util.rs:155:24
00:18:31 E:   65: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
00:18:31 E:              at /rust/deps/scoped-tls-1.0.1/src/lib.rs:137:9
00:18:31 E:   66: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
00:18:31 E:              at /rustc-dev/1.91.0/compiler/rustc_span/src/lib.rs:146:21
00:18:31 E:   67: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}
00:18:31 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/util.rs:151:17
00:18:31 E: note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
00:18:31 E: 
00:18:31 E: note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
00:18:31 E: 
00:18:31 E: note: please make sure that you have updated to the latest nightly
00:18:31 E: 
00:18:31 E: note: please attach the file at `/home/fabiang/rust-test/rustc-ice-2025-12-18T00_16_56-276742.txt` to your bug report
00:18:31 E: 
00:18:31 E: note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -C debuginfo=2 -C linker=sparc64-linux-gnu-gcc -Z validate-mir -C symbol-mangling-version=legacy -Z unstable-options -Z macro-backtrace -C split-debuginfo=off -C prefer-dynamic -Z inline-mir -Z inline-mir-preserve-debug -Z mir_strip_debuginfo=locals-in-tiny-functions -C embed-bitcode=yes -Z unstable-options -C force-frame-pointers=non-leaf -Z crate-attr=doc(html_root_url="https://doc.rust-lang.org/1.91.0/") -Z binary-dep-depinfo -Z force-unstable-if-unmarked
00:18:31 E: 
00:18:31 E: note: some of the compiler flags provided by cargo are hidden
00:18:31 E: 
00:18:31 E: query stack during panic:
00:18:31 E: #0 [optimized_mir] optimizing MIR for `num::flt2dec::decoder::<impl at library/core/src/num/flt2dec/decoder.rs:30:30: 30:39>::eq`
00:18:31 E: #1 [analysis] running analysis passes on this crate
00:18:31 E: end of query stack
00:18:43 E: 
00:18:43 E: thread 'rustc' panicked at compiler/rustc_middle/src/mir/statement.rs:199:82:
00:18:43 E: called `Option::unwrap()` on a `None` value
00:18:43 E: stack backtrace:
00:18:43 E:    0: __rustc::rust_begin_unwind
00:18:43 E:              at /usr/src/rustc-1.90.0/library/std/src/panicking.rs:697:5
00:18:43 E:    1: core::panicking::panic_fmt
00:18:43 E:              at /usr/src/rustc-1.90.0/library/core/src/panicking.rs:75:14
00:18:43 E:    2: core::panicking::panic
00:18:43 E:              at /usr/src/rustc-1.90.0/library/core/src/panicking.rs:145:5
00:18:43 E:    3: core::option::unwrap_failed
00:18:43 E:              at /usr/src/rustc-1.90.0/library/core/src/option.rs:2130:5
00:18:43 E:    4: <core::option::Option<rustc_middle::ty::Ty>>::unwrap
00:18:43 E:              at /rustc-dev/1.91.0/library/core/src/option.rs:1009:21
00:18:43 E:    5: <rustc_middle::mir::statement::PlaceTy>::projection_ty_core::<rustc_middle::mir::Local, rustc_middle::ty::Ty, <rustc_middle::mir::statement::PlaceTy>::projection_ty<rustc_middle::mir::Local>::{closure#0}, <rustc_middle::mir::statement::PlaceTy>::projection_ty<rustc_middle::mir::Local>::{closure#1}, <rustc_middle::mir::statement::PlaceTy>::projection_ty<rustc_middle::mir::Local>::{closure#2}>
00:18:43 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/statement.rs:199:82
00:18:43 E:    6: <rustc_middle::mir::statement::PlaceTy>::projection_ty::<rustc_middle::mir::Local>
00:18:43 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/statement.rs:168:14
00:18:43 E:    7: <rustc_middle::mir::statement::PlaceTy>::multi_projection_ty::{closure#0}
00:18:43 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/statement.rs:157:60
00:18:43 E:    8: <core::slice::iter::Iter<rustc_middle::mir::syntax::ProjectionElem<rustc_middle::mir::Local, rustc_middle::ty::Ty>> as core::iter::traits::iterator::Iterator>::fold::<rustc_middle::mir::statement::PlaceTy, <rustc_middle::mir::statement::PlaceTy>::multi_projection_ty::{closure#0}>
00:18:43 E:              at /rustc-dev/1.91.0/library/core/src/slice/iter/macros.rs:255:27
00:18:43 E:    9: <rustc_middle::mir::statement::PlaceTy>::multi_projection_ty
00:18:43 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/statement.rs:157:22
00:18:43 E:   10: <rustc_middle::mir::syntax::Place>::ty_from::<rustc_index::vec::IndexVec<rustc_middle::mir::Local, rustc_middle::mir::LocalDecl>>
00:18:43 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/statement.rs:420:63
00:18:44 E:   11: <rustc_middle::mir::syntax::Place>::ty::<rustc_index::vec::IndexVec<rustc_middle::mir::Local, rustc_middle::mir::LocalDecl>>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/statement.rs:427:9
00:18:44 E:   12: <rustc_middle::mir::syntax::Operand>::ty::<rustc_index::vec::IndexVec<rustc_middle::mir::Local, rustc_middle::mir::LocalDecl>>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/statement.rs:638:64
00:18:44 E:   13: <rustc_middle::mir::syntax::Rvalue>::ty::<rustc_index::vec::IndexVec<rustc_middle::mir::Local, rustc_middle::mir::LocalDecl>>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/statement.rs:746:34
00:18:44 E:   14: <rustc_mir_transform::validate::TypeChecker as rustc_middle::mir::visit::Visitor>::visit_statement
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/validate.rs:1422:39
00:18:44 E:   15: <rustc_mir_transform::validate::TypeChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/visit.rs:311:26
00:18:44 E:   16: <rustc_mir_transform::validate::TypeChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/visit.rs:88:22
00:18:44 E:   17: <rustc_mir_transform::validate::TypeChecker as rustc_middle::mir::visit::Visitor>::super_body
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/visit.rs:1067:19
00:18:44 E:   18: <rustc_mir_transform::validate::TypeChecker as rustc_middle::mir::visit::Visitor>::visit_body
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/mir/visit.rs:78:22
00:18:44 E:   19: rustc_mir_transform::validate::validate_types
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/validate.rs:555:22
00:18:44 E:   20: <rustc_mir_transform::validate::Validator as rustc_mir_transform::pass_manager::MirPass>::run_pass
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/validate.rs:79:32
00:18:44 E:   21: rustc_mir_transform::pass_manager::validate_body
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/pass_manager.rs:352:34
00:18:44 E:   22: rustc_mir_transform::pass_manager::run_passes_inner
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/pass_manager.rs:316:17
00:18:44 E:   23: rustc_mir_transform::pass_manager::run_passes
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/pass_manager.rs:210:5
00:18:44 E:   24: rustc_mir_transform::run_optimization_passes
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:668:5
00:18:44 E:   25: rustc_mir_transform::inner_optimized_mir
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:787:5
00:18:44 E:   26: rustc_mir_transform::optimized_mir
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:745:21
00:18:44 E:   27: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_query_impl/src/plumbing.rs:298:13
00:18:44 E:       [... omitted 22 frames ...]
00:18:44 E:   28: <rustc_middle::ty::context::TyCtxt>::instance_mir
00:18:44 E:   29: rustc_mir_transform::inline::try_instance_mir
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/inline.rs:1378:12
00:18:44 E:   30: rustc_mir_transform::inline::try_inlining::<rustc_mir_transform::inline::NormalInliner>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/inline.rs:625:23
00:18:44 E:   31: rustc_mir_transform::inline::process_blocks::<rustc_mir_transform::inline::NormalInliner>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/inline.rs:532:15
00:18:44 E:   32: rustc_mir_transform::inline::inline::<rustc_mir_transform::inline::NormalInliner>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/inline.rs:510:5
00:18:44 E:   33: <rustc_mir_transform::inline::Inline as rustc_mir_transform::pass_manager::MirPass>::run_pass
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/inline.rs:64:12
00:18:44 E:   34: rustc_mir_transform::pass_manager::run_passes_inner
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/pass_manager.rs:308:22
00:18:44 E:   35: rustc_mir_transform::pass_manager::run_passes
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/pass_manager.rs:210:5
00:18:44 E:   36: rustc_mir_transform::run_optimization_passes
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:668:5
00:18:44 E:   37: rustc_mir_transform::inner_optimized_mir
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:787:5
00:18:44 E:   38: rustc_mir_transform::optimized_mir
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:745:21
00:18:44 E:   39: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_query_impl/src/plumbing.rs:298:13
00:18:44 E:       [... omitted 22 frames ...]
00:18:44 E:   40: <rustc_middle::ty::context::TyCtxt>::instance_mir
00:18:44 E:   41: rustc_mir_transform::inline::try_instance_mir
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/inline.rs:1378:12
00:18:44 E:   42: rustc_mir_transform::inline::try_inlining::<rustc_mir_transform::inline::NormalInliner>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/inline.rs:625:23
00:18:44 E:   43: rustc_mir_transform::inline::process_blocks::<rustc_mir_transform::inline::NormalInliner>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/inline.rs:532:15
00:18:44 E:   44: rustc_mir_transform::inline::inline::<rustc_mir_transform::inline::NormalInliner>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/inline.rs:510:5
00:18:44 E:   45: <rustc_mir_transform::inline::Inline as rustc_mir_transform::pass_manager::MirPass>::run_pass
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/inline.rs:64:12
00:18:44 E:   46: rustc_mir_transform::pass_manager::run_passes_inner
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/pass_manager.rs:308:22
00:18:44 E:   47: rustc_mir_transform::pass_manager::run_passes
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/pass_manager.rs:210:5
00:18:44 E:   48: rustc_mir_transform::run_optimization_passes
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:668:5
00:18:44 E:   49: rustc_mir_transform::inner_optimized_mir
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:787:5
00:18:44 E:   50: rustc_mir_transform::optimized_mir
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_mir_transform/src/lib.rs:745:21
00:18:44 E:   51: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_query_impl/src/plumbing.rs:298:13
00:18:44 E:       [... omitted 22 frames ...]
00:18:44 E:   52: <rustc_middle::ty::context::TyCtxt>::instance_mir
00:18:44 E:   53: rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1134:21
00:18:44 E:   54: <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners::<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/hir/map.rs:340:79
00:18:44 E:   55: rustc_data_structures::sync::parallel::par_for_each_in::<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:181:30
00:18:44 E:   56: <core::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
00:18:44 E:              at /rustc-dev/1.91.0/library/core/src/panic/unwind_safe.rs:272:9
00:18:44 E:   57: std::panicking::catch_unwind::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>, ()>
00:18:44 E:              at /rustc-dev/1.91.0/library/std/src/panicking.rs:589:40
00:18:44 E:   58: std::panicking::catch_unwind::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>>
00:18:44 E:              at /rustc-dev/1.91.0/library/std/src/panicking.rs:552:19
00:18:44 E:   59: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>, ()>
00:18:44 E:              at /rustc-dev/1.91.0/library/std/src/panic.rs:359:14
00:18:44 E:   60: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:23:9
00:18:44 E:   61: rustc_data_structures::sync::parallel::par_for_each_in::<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:181:23
00:18:44 E:   62: <core::slice::iter::Iter<rustc_span::def_id::LocalDefId> as core::iter::traits::iterator::Iterator>::for_each::<rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}::{closure#1}>
00:18:44 E:              at /rustc-dev/1.91.0/library/core/src/slice/iter/macros.rs:277:21
00:18:44 E:   63: rustc_data_structures::sync::parallel::par_for_each_in::<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:180:27
00:18:44 E:   64: rustc_data_structures::sync::parallel::parallel_guard::<(), rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>::{closure#0}>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
00:18:44 E:   65: rustc_data_structures::sync::parallel::par_for_each_in::<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>::{closure#0}>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/sync/parallel.rs:175:5
00:18:44 E:   66: <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners::<rustc_interface::passes::run_required_analyses::{closure#4}::{closure#0}>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/hir/map.rs:340:9
00:18:44 E:   67: rustc_interface::passes::run_required_analyses::{closure#4}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1133:17
00:18:44 E:   68: <rustc_data_structures::profiling::VerboseTimingGuard>::run::<(), rustc_interface::passes::run_required_analyses::{closure#4}>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_data_structures/src/profiling.rs:844:9
00:18:44 E:   69: <rustc_session::session::Session>::time::<(), rustc_interface::passes::run_required_analyses::{closure#4}>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_session/src/utils.rs:17:50
00:18:44 E:   70: rustc_interface::passes::run_required_analyses
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1132:14
00:18:44 E:   71: rustc_interface::passes::analysis
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1143:5
00:18:44 E:   72: rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_query_impl/src/plumbing.rs:294:9
00:18:44 E:       [... omitted 22 frames ...]
00:18:44 E:   73: rustc_middle::query::plumbing::query_ensure::<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/query/plumbing.rs:198:9
00:18:44 E:   74: <rustc_middle::query::plumbing::TyCtxtEnsureOk>::analysis
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/query/plumbing.rs:233:9
00:18:44 E:   75: rustc_driver_impl::run_compiler::{closure#0}::{closure#2}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_driver_impl/src/lib.rs:371:29
00:18:44 E:   76: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1017:27
00:18:44 E:   77: <rustc_middle::ty::context::GlobalCtxt>::enter::<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context.rs:1619:37
00:18:44 E:   78: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context/tls.rs:60:9
00:18:44 E:   79: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
00:18:44 E:              at /rustc-dev/1.91.0/library/std/src/thread/local.rs:315:12
00:18:44 E:   80: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
00:18:44 E:              at /rustc-dev/1.91.0/library/std/src/thread/local.rs:279:20
00:18:44 E:   81: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>::{closure#1}, core::option::Option<rustc_interface::queries::Linker>>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context/tls.rs:57:9
00:18:44 E:   82: <rustc_middle::ty::context::GlobalCtxt>::enter::<rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core::option::Option<rustc_interface::queries::Linker>>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context.rs:1619:9
00:18:44 E:   83: <rustc_middle::ty::context::TyCtxt>::create_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_middle/src/ty/context.rs:1824:13
00:18:44 E:   84: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:984:9
00:18:44 E:   85: <rustc_interface::passes::create_and_enter_global_ctxt<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
00:18:44 E:              at /rustc-dev/1.91.0/library/core/src/ops/function.rs:253:5
00:18:44 E:   86: <alloc::boxed::Box<dyn for<'a> core::ops::function::FnOnce<(&'a rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &'a std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena<'a>>, &'a rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena<'a>>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}), Output = core::option::Option<rustc_interface::queries::Linker>>> as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once
00:18:44 E:              at /rustc-dev/1.91.0/library/alloc/src/boxed.rs:1971:9
00:18:44 E:   87: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/passes.rs:1025:5
00:18:44 E:   88: rustc_driver_impl::run_compiler::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_driver_impl/src/lib.rs:344:22
00:18:44 E:   89: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/interface.rs:531:80
00:18:44 E:   90: <core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
00:18:44 E:              at /rustc-dev/1.91.0/library/core/src/panic/unwind_safe.rs:272:9
00:18:44 E:   91: std::panicking::catch_unwind::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}>, ()>
00:18:44 E:              at /rustc-dev/1.91.0/library/std/src/panicking.rs:589:40
00:18:44 E:   92: std::panicking::catch_unwind::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}>>
00:18:44 E:              at /rustc-dev/1.91.0/library/std/src/panicking.rs:552:19
00:18:44 E:   93: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}::{closure#0}>, ()>
00:18:44 E:              at /rustc-dev/1.91.0/library/std/src/panic.rs:359:14
00:18:44 E:   94: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/interface.rs:531:23
00:18:44 E:   95: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/util.rs:201:17
00:18:44 E:   96: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/util.rs:155:24
00:18:44 E:   97: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}, ()>
00:18:44 E:              at /rust/deps/scoped-tls-1.0.1/src/lib.rs:137:9
00:18:44 E:   98: rustc_span::create_session_globals_then::<(), rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_span/src/lib.rs:146:21
00:18:44 E:   99: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}
00:18:44 E:              at /rustc-dev/1.91.0/compiler/rustc_interface/src/util.rs:151:17
00:18:44 E: note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
00:18:44 E: 
00:18:44 E: error: the compiler unexpectedly panicked. this is a bug.
00:18:44 E: 
00:18:44 E: note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
00:18:44 E: 
00:18:44 E: note: please make sure that you have updated to the latest nightly
00:18:44 E: 
00:18:44 E: note: please attach the file at `/home/fabiang/rust-test/rustc-ice-2025-12-18T00_16_56-276742.txt` to your bug report
00:18:44 E: 
00:18:44 E: note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -C debuginfo=2 -C linker=sparc64-linux-gnu-gcc -Z validate-mir -C symbol-mangling-version=legacy -Z unstable-options -Z macro-backtrace -C split-debuginfo=off -C prefer-dynamic -Z inline-mir -Z inline-mir-preserve-debug -Z mir_strip_debuginfo=locals-in-tiny-functions -C embed-bitcode=yes -Z unstable-options -C force-frame-pointers=non-leaf -Z crate-attr=doc(html_root_url="https://doc.rust-lang.org/1.91.0/") -Z binary-dep-depinfo -Z force-unstable-if-unmarked
00:18:44 E: 
00:18:44 E: note: some of the compiler flags provided by cargo are hidden
00:18:44 E: 
00:18:44 E: query stack during panic:
00:18:44 E: #0 [optimized_mir] optimizing MIR for `net::ip_addr::<impl at library/core/src/net/ip_addr.rs:1281:1: 1281:14>::to_ipv4_mapped`
00:18:44 E: #1 [optimized_mir] optimizing MIR for `net::ip_addr::<impl at library/core/src/net/ip_addr.rs:1281:1: 1281:14>::to_canonical`
00:18:44 E: #2 [optimized_mir] optimizing MIR for `net::ip_addr::<impl at library/core/src/net/ip_addr.rs:235:1: 235:12>::to_canonical`
00:18:44 E: #3 [analysis] running analysis passes on this crate
00:18:44 E: end of query stack
00:18:56 E: error: could not compile `core` (lib)
00:18:56 E: 
00:18:56 E: Caused by:
00:18:56 E:   process didn't exit successfully: `/home/fabiang/rust-test/build/bootstrap/debug/rustc /home/fabiang/rust-test/build/bootstrap/debug/rustc --crate-name core --edition=2024 library/core/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no -C debuginfo=2 --warn=unexpected_cfgs --check-cfg 'cfg(no_fp_fmt_parse)' --check-cfg 'cfg(feature, values(any()))' --check-cfg 'cfg(target_has_reliable_f16)' --check-cfg 'cfg(target_has_reliable_f16_math)' --check-cfg 'cfg(target_has_reliable_f128)' --check-cfg 'cfg(target_has_reliable_f128_math)' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("debug_refcell", "optimize_for_size", "panic_immediate_abort"))' -C metadata=b721b2269423f941 -C extra-filename=-21ae32681e63286b --out-dir /home/fabiang/rust-test/build/sparc64-unknown-linux-gnu/stage1-std/sparc64-unknown-linux-gnu/release/deps --target sparc64-unknown-linux-gnu -C linker=sparc64-linux-gnu-gcc -L dependency=/home/fabiang/rust-test/build/sparc64-unknown-linux-gnu/stage1-std/sparc64-unknown-linux-gnu/release/deps -L dependency=/home/fabiang/rust-test/build/sparc64-unknown-linux-gnu/stage1-std/release/deps -Zvalidate-mir -Csymbol-mangling-version=legacy '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/1.91.0/")' -Z binary-dep-depinfo` (exit status: 101)
00:18:56 E: Build completed unsuccessfully in 1:20:29
00:18:56 I: Finished with exitcode 1

[Fabian-Gruenbichler]

meanwhile the bisect had two broken commits, but with a different ICE, so maybe your theory that the 1.90 compiler is somehow broken has some merit :-/ I will still let drive it to the finish and see what it ends up with and then post a summary.

[Fabian-Gruenbichler]

so the bisect probably took a wrong turn somewhere, or the problem is actually a broken 1.90 compiler:

# broken: [f8297e351a40c1439a467bbbb6879088047f50b3] Auto merge of #148216 - cuviper:stable-next, r=BoxyUwU,jackh726
# working: [1159e78c4747b02ef996e55082b704c09b970588] Auto merge of #146543 - Mark-Simulacrum:stable-next, r=Mark-Simulacrum
git bisect start '--term-new' 'broken' '--term-old' 'working' '1.91.0' '1.90.0'
# working: [6d091b2baa33698682453c7bb72809554204e434] Auto merge of #144554 - cjgillot:no-hir-eff-vis, r=petrochenkov
git bisect working 6d091b2baa33698682453c7bb72809554204e434
# broken: [8c2d2c07ff7af6e9d10e00833d8e82a483f2acae] Prepare for merging from rust-lang/rust
git bisect broken 8c2d2c07ff7af6e9d10e00833d8e82a483f2acae
# broken: [3d6976cba80a20ee553579e3d2d559aadfcce851] Rollup merge of #144739 - GuillaumeGomez:rustdoc-test-cleanup, r=fmease
git bisect broken 3d6976cba80a20ee553579e3d2d559aadfcce851
# working: [238e3bf9e9f895abd59b7ca0e531302cc5efd55a] Rollup merge of #144369 - joshtriplett:mbe-expr-semi-deny-by-default, r=petrochenkov
git bisect working 238e3bf9e9f895abd59b7ca0e531302cc5efd55a
# broken: [162e2e4e65b2bb6869a4a7c7266b74e3049e5075] Rollup merge of #145030 - cjgillot:gvn-no-flatten-index, r=saethlin
git bisect broken 162e2e4e65b2bb6869a4a7c7266b74e3049e5075
# skip: [faba846a099e87e0786188b6b4b3e5c27fe2a2c0] Fix typo in lint issue template (#15427)
git bisect skip faba846a099e87e0786188b6b4b3e5c27fe2a2c0
# broken: [9cfe5f61ab66fb8fba8907ff45dfb9d0dee617ae] bootstrap: split runtime DLL part out of `make_win_dist`
git bisect broken 9cfe5f61ab66fb8fba8907ff45dfb9d0dee617ae
# broken: [987a49ba38e29f8c8b8dde4aab71dfad0f28f3fa] bootstrap: extract `cc` query into a new function
git bisect broken 987a49ba38e29f8c8b8dde4aab71dfad0f28f3fa
# first broken commit: [987a49ba38e29f8c8b8dde4aab71dfad0f28f3fa] bootstrap: extract `cc` query into a new function

the ICE for all but 1.91 have a different message though:

3d6976cba80a20ee553579e3d2d559aadfcce851: 00:26:10 E: thread 'rustc' panicked at compiler/rustc_mir_transform/src/ssa.rs:212:40:
00:26:10 E: index out of bounds: the len is 86 but the index is 329068600
162e2e4e65b2bb6869a4a7c7266b74e3049e5075: 09:39:50 E: thread 'rustc' panicked at compiler/rustc_mir_transform/src/ssa.rs:212:40:
09:39:50 E: index out of bounds: the len is 86 but the index is 330125368
9cfe5f61ab66fb8fba8907ff45dfb9d0dee617ae: 11:03:08 E: thread 'rustc' panicked at compiler/rustc_mir_transform/src/ssa.rs:212:40:
11:03:08 E: index out of bounds: the len is 86 but the index is 329076952
987a49ba38e29f8c8b8dde4aab71dfad0f28f3fa: 11:55:20 E: thread 'rustc' panicked at compiler/rustc_mir_transform/src/ssa.rs:212:40:
11:55:20 E: index out of bounds: the len is 86 but the index is 331174104

I am now doing a cross-build of nightly without Debian LLVM, and another one of 1.91.1, and will see where that takes me.