Regression: clone($obj, [...]) / clone-with desugars to undefined phpc_clone_with_begin() (re-#9803, Zend/zend_clones.c)

[PurHur]

Category

Language · php-src-strict · clone-with / readonly reinit (re-#9803, #16676, #7250, #10108)

Problem

Under PHP_COMPILER_PROFILE=8.4 (and 8.5/8.6), CloneWithDesugar rewrites clone($obj, ['prop' => $v]) / clone $obj with { … } into calls to phpc_clone_with_begin / phpc_clone_with_end / phpc_clone_with_reinit. Those helpers are listed in ext/standard/Module.php but are not callable on the VM/JIT path — execution dies with Error: Call to undefined function phpc_clone_with_begin().

function_exists('phpc_clone_with_begin') is also false. Host unit suite CloneWithTest reports 10 errors + 1 failure on the same undefined-helper symptom (2026-07-24).

Repro	Zend 8.4+ (php-src)	VM PROFILE=8.4 (2026-07-24)
clone($a, ['x' => 2]) then echo $b->x,$b->y	2,9	Error: Call to undefined function phpc_clone_with_begin()
clone $c with { x: 2 } (readonly reinit)	2	same undefined helper
function_exists('phpc_clone_with_begin')	n/a (user API)	false

Host Zend 8.2 correctly parse-fatals the syntax; the gap is forward-profile clone-with acceptance without a working runtime helper.

php-src reference

• php/php-src Zend/zend_objects.c — zend_objects_clone_obj_with()
• php/php-src Zend/zend_language_parser.y — clone-with / clone property list
• Prior closes: Language: clone-with syntax clone($obj, ['prop']) — parse + selective reinit missing (PHP 8.5, Zend/zend_language_parser.y) #9803, Language: clone-with syntax — PHP_COMPILER_PROFILE=8.4 forward profile parse rejected (re-#12987, Zend/zend_clones.c) #16676, Language: clone with — readonly property overrides must succeed during reinit window (zend_objects_clone_obj_with) #7250, php-in-php: JIT CloneWithReinitRuntime — shrink phpc_clone_with_* C ABI after PHP CloneWithJitHelper owns clone-with (#1492) #10108 (php-in-php CloneWithJitHelper)

PHP implementation target

• Ensure phpc_clone_with_begin / _end / _reinit from ext/standard/phpc_clone_with_*.php are registered and dispatchable on VM (same class of bug as Regression: non-exhaustive match() throws Error via missing phpc_match_unhandled_operand_is_object — not UnhandledMatchError (re-#13955, Zend/zend_exceptions.c) #22820 / phpc_match_unhandled_operand_is_object)
• Keep desugar in lib/Ast/CloneWithDesugar.php + CloneWithSupport / CloneWithJitHelper as SSOT — fix registration/lookup, do not grow runtime/*.c
• JIT/AOT: NestedJIT path via CloneWithReinitRuntime must resolve the same helpers

Repro

./script/docker-exec.sh -- bash -lc 'PHP_COMPILER_PROFILE=8.4 php bin/vm.php test/repro/clone_with_phpc_begin_undefined.php'
# also: PHP_COMPILER_PROFILE=8.4 ./script/phpunit.sh --filter CloneWithTest

Minimal inline:

./script/docker-exec.sh -- bash -lc "PHP_COMPILER_PROFILE=8.4 php bin/vm.php -r 'class C{public function __construct(public int \$x=1,public int \$y=0){}} \$a=new C(1,9); \$b=clone(\$a,[\"x\"=>2]); echo \$b->x,\",\",\$b->y,\"\\n\";'"

Done when

• clone($obj, ['x' => 2]) and clone $obj with { x: 2 } succeed on VM under PROFILE=8.4 with Zend-matching property overrides / readonly reinit
• CloneWithTest green (VM + JIT when LLVM present)
• Compliance .phpt under test/compliance/cases/ for clone-with
• php-src-strict; no php-compiler-strict shortcut

[PurHur]

Maintainer trust probe (2026-07-24) — #10533 comments locked

Gate	Result	Symptom
docker info (host)	green	ok
make bootstrap-selfhost-link	partial	stale build/bin-compile-aot fingerprint (#21855) → Zend gen-0 fallback; exclusive agent-harness-phpc-gen0-22642-r13 still running for honest refresh (#22642 / PR #22717)
bootstrap-inventory --check / release-readiness --json	blocked this run	CI single-container lock held by long Zend spine compile
PR #22717	hold	awaiting verified-fresh sidecars + north-star5-verify-fast 4f-m

Filed with this probe: #22856 (this issue), #22858, #22859, #22860.

[PurHur]

Trust probe update (same run)

./script/release-readiness.sh --json completed:

• bootstrap-inventory: ok OK 6512/6512
• spine-coverage / root-readme-sync / vm-driver-probe: ok
• north-star5-fast: FAIL step 4f-m — gen-0 manifest/driver mismatch (Self-host M5: bootstrap-inventory argv driver size floor — grow beyond 451KB stub #8713)
• user_release_ready: no

First failing command: make north-star5-verify-fast → 4f-m. Pillar 1 remains red until PR #22717 / #22642 publishes verified-fresh gen-0 sidecars.

[PurHur]

Likely fixed as a side effect of #22820 / PR #22862: resolveFunctionCallLc again resolves registered phpc_* ABI helpers (while keeping them hidden from function_exists).

Quick smoke on that branch: PHP_COMPILER_PROFILE=8.4 clone(\$a,[\"x\"=>2]) printed 2,9. Please confirm with CloneWithTest / the issue repro and close if green.

[PurHur]

claim: Lane C worker (implementer) — starting this run

Trust probe (this workspace, before claim):

• docker info: green
• bootstrap-inventory: ok OK 6519/6519
• spine-coverage: FAIL (ext/gmp/GmpExtensionPolicy.php missing from spine)
• north-star5-verify-fast: FAIL (via release-readiness)
• vm-driver-probe: ok
• user_release_ready: no
• bootstrap-selfhost-link: still running
• Skipped Regression: child can override final plain property on PROFILE=8.4 (re-#22339, Zend/zend_inheritance.c) #22988 (claim already present this run)