Fix/5946 pest infestation bogwater softlock#6245
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Parse parameterized creature-token gifts from reminder text, route gift keyword lines through raw Oracle before reminder stripping, synthesize permanent gift delivery as an ETB trigger, and extend AI downside scoring. Co-authored-by: Cursor <cursoragent@cursor.com>
…rs#5975) Replace starts_with/match-literal gift dispatch with shared nom helpers (parse_gift_a_declaration, is_gift_keyword_router_line). Co-authored-by: Cursor <cursoragent@cursor.com>
…#5975) Fix nom tuple output typing after combinator-gate refactor. Co-authored-by: Cursor <cursoragent@cursor.com>
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Code Review
This pull request implements support for the "Gift an Octopus" mechanic (CR 702.174) for cards like Octomancer. It introduces the GiftCreatureToken struct and CreatureToken variant to GiftKind, handles parsing of parameterized creature-token gift delivery clauses from reminder text, synthesizes ETB gift-delivery triggers for permanent gifts, and updates the downside awareness AI policy to scale penalties for creature token gifts. Feedback highlights two style guide violations: first, the use of manual string searching (.find()) in parser dispatch inside oracle_keyword.rs violates rule R1, which mandates the exclusive use of nom combinators; second, the new rules-touching code block in gift_delivery.rs lacks a mandatory CR annotation, violating rule R6.
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| fn parse_gift_delivery_from_reminder(reminder: &str) -> Option<GiftKind> { | ||
| let lower = reminder.to_lowercase(); | ||
| let trimmed = lower.trim().trim_end_matches('.'); | ||
| let delivery = [ | ||
| "they draw a card", | ||
| "they create a treasure token", | ||
| "they create a food token", | ||
| "they create a tapped 1/1 blue fish creature token", | ||
| "they create an ", | ||
| "they create a ", | ||
| ] | ||
| .iter() | ||
| .find_map(|needle| trimmed.find(needle).map(|idx| &trimmed[idx..]))?; | ||
|
|
||
| if tag::<_, _, OracleError<'_>>("they draw a card") | ||
| .parse(delivery) | ||
| .is_ok() | ||
| { | ||
| return Some(GiftKind::Card); | ||
| } | ||
| if tag::<_, _, OracleError<'_>>("they create a treasure token") | ||
| .parse(delivery) | ||
| .is_ok() | ||
| { | ||
| return Some(GiftKind::Treasure); | ||
| } | ||
| if tag::<_, _, OracleError<'_>>("they create a food token") | ||
| .parse(delivery) | ||
| .is_ok() | ||
| { | ||
| return Some(GiftKind::Food); | ||
| } | ||
| if tag::<_, _, OracleError<'_>>("they create a tapped 1/1 blue fish creature token") | ||
| .parse(delivery) | ||
| .is_ok() | ||
| { | ||
| return Some(GiftKind::TappedFish); | ||
| } | ||
| parse_gift_creature_token_delivery(delivery) | ||
| } |
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[HIGH] Avoid verbatim string search and .find() in parser dispatch. Evidence: crates/engine/src/parser/oracle_keyword.rs:2152-2191. Why it matters: Using manual string searching and .find() violates the hard architectural rule R1 and bypasses the robust nom-based parser. Suggested fix: Decompose compound phrases into modular, reusable parsers for constituent parts (e.g., subjects, actions) and compose them using idiomatic combinator aggregates (like nested alt and tag sequences) to prevent combinatorial explosion and improve maintainability.
fn parse_gift_delivery_from_reminder(reminder: &str) -> Option<GiftKind> {
let lower = reminder.to_lowercase();
let trimmed = lower.trim().trim_end_matches('.');
let (remaining, _) = tag::<_, _, OracleError<'_>>("they ")(trimmed).ok()?;
let draw_parser = map(tag("draw a card"), |_| GiftKind::Card);
let create_parser = preceded(
tag("create "),
alt((
value(GiftKind::Treasure, tag("a treasure token")),
value(GiftKind::Food, tag("a food token")),
value(GiftKind::TappedFish, tag("a tapped 1/1 blue fish creature token")),
))
);
if let Ok((_, kind)) = alt((draw_parser, create_parser))(remaining) {
return Some(kind);
}
parse_gift_creature_token_delivery(remaining)
}References
- R1. Nom combinators on the first pass — no exceptions. Every new parser dispatch under crates/engine/src/parser/ must use nom 8.0 combinators. No .contains(), .starts_with(), .ends_with(), .find(), or .split_once() used for parsing dispatch in non-test parser code. (link)
- Avoid verbatim string equality for parsing Oracle phrases as it bypasses the robust nom-based parser and creates fragile matches. Instead, decompose compound phrases into modular, reusable parsers for constituent parts and compose them using idiomatic combinator aggregates.
| GiftKind::CreatureToken(spec) => { | ||
| let obj_id = create_gift_token( | ||
| state, | ||
| events, | ||
| opponent, | ||
| &spec.name, | ||
| ability.source_id, | ||
| |ct| { | ||
| ct.core_types.push(CoreType::Creature); | ||
| ct.subtypes.extend(spec.subtypes.iter().cloned()); | ||
| }, | ||
| ); | ||
| if let Some(obj) = state.objects.get_mut(&obj_id) { | ||
| obj.color = spec.colors.clone(); | ||
| obj.base_color = spec.colors.clone(); | ||
| obj.power = Some(spec.power); | ||
| obj.toughness = Some(spec.toughness); | ||
| obj.base_power = Some(spec.power); | ||
| obj.base_toughness = Some(spec.toughness); | ||
| obj.tapped = spec.tapped; | ||
| } | ||
| } |
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[MEDIUM] Missing mandatory CR annotation. Evidence: crates/engine/src/game/effects/gift_delivery.rs:82-103. Why it matters: Every rules-touching line of engine code must carry a CR annotation per rule R6. Suggested fix: Add a CR 702.174 comment before resolving the creature token gift.
GiftKind::CreatureToken(spec) => {
// CR 702.174: Deliver the promised creature token gift to the opponent.
let obj_id = create_gift_token(
state,
events,
opponent,
&spec.name,
ability.source_id,
|ct| {
ct.core_types.push(CoreType::Creature);
ct.subtypes.extend(spec.subtypes.iter().cloned());
},
);
if let Some(obj) = state.objects.get_mut(&obj_id) {
obj.color = spec.colors.clone();
obj.base_color = spec.colors.clone();
obj.power = Some(spec.power);
obj.toughness = Some(spec.toughness);
obj.base_power = Some(spec.power);
obj.base_toughness = Some(spec.toughness);
obj.tapped = spec.tapped;
}
}References
- R6. CR annotations are mandatory and verified. Every rules-touching line of engine code must carry a comment of the form CR : . (link)
Parse changes introduced by this PR · 4 card(s), 4 signature(s) (baseline: main
|
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matthewevans
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Blocked — this head does not contain the #5946 softlock fix described by the PR.
🔴 Blocker
-
The submitted change set is for #5975, not #5946. Evidence:
crates/engine/tests/integration/issue_5975_octomancer_gift.rs:1identifies this as the Octomancer Gift-an-Octopus regression, while the current diff has nocrates/engine/src/game/stack.rs, Pest Infestation, or Bogwater changes despite the PR summary claiming a stack-run batcher. Why it matters: merging this cannot resolve the linked P0 softlock and would misattribute an unrelated parser/engine feature to #5946. Suggested fix: replace the branch with the scoped #5946 stack-batching implementation plus a discriminating Pest Infestation/Bogwater regression, or retitle/reopen this work as a separate #5975 PR. -
The Gift parser still uses string-search dispatch. Evidence:
crates/engine/src/parser/oracle_keyword.rs:2163-2164selects a delivery clause via.find_map(... trimmed.find(...)). Why it matters: this bypasses the repository’s required nom parser grammar and is the open Gemini high-severity finding. Suggested fix: scan word boundaries with a composed nom delivery-clause parser instead of searching substrings. -
Creature-token gift delivery lacks the required rule annotation. Evidence:
crates/engine/src/game/effects/gift_delivery.rs:82creates and configures the promised token without a CR annotation; CR 702.174 defines Gift. Why it matters: the rules implementation has no verified source citation. Suggested fix: add a grep-verified CR 702.174 annotation directly above this arm.
Recommendation: request changes; do not enqueue this head.
3 participants
Closes #5946
Summary
Discord report: Pest Infestation for X=100 softlocked while resolving ~200 Bogwater Lumaret ETB life-gain triggers on the stack.
Root cause: Bogwater correctly fires one
GainLife { Fixed(1), Controller }trigger per entering creature (batched: false). Contiguous identical runs still resolved one-by-one through priority/WASM with no proven-inert collapse (unlike the self-counter batch path), so Instant stack pressure froze the client.Fix: extend the proven-inert contiguous stack-run batcher for Fixed Controller
GainLifewith a production-aware candidate gate (allow inert provenance stamps) and SourceIndependent keying so interleaved Soul Warden–class triggers can share a run when checkpoints stay inert.Changes
crates/engine/src/game/stack.rs—fixed_controller_gain_life_*helpers +resolve_proven_fixed_controller_gain_life_batch; wire after self_counter, before Token Tier-3.crates/engine/tests/integration/issue_5946_pest_infestation_bogwater_softlock.rs— oracle Bogwater + token flood softlock budget; SourceIndependent collapse for two interleaved ETB gainers.Test Plan
cargo fmt --all -- --checkcargo test -p engine --integration bogwater_token_etb_life_gain_batches_without_softlockcargo test -p engine --integration interleaved_identical_etb_gainers_batch_source_independent