Fix missing unused_variables lint when using a match guard#151990
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rust-bors[bot] merged 1 commit intorust-lang:mainfrom Feb 3, 2026
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Fix missing unused_variables lint when using a match guard#151990rust-bors[bot] merged 1 commit intorust-lang:mainfrom
rust-bors[bot] merged 1 commit intorust-lang:mainfrom
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Some changes occurred to MIR optimizations cc @rust-lang/wg-mir-opt |
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Within a binding pattern match guard, only real reads of a bound local impact its liveness analysis - not the fake read that is injected.
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Some changes occurred in src/tools/clippy cc @rust-lang/clippy |
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| let (lhs, rhs) = match expr.kind { | ||
| ExprKind::Binary(op, lhs, rhs) if matches!(op.node, BinOpKind::Sub,) => (lhs, rhs), | ||
| ExprKind::MethodCall(fn_name, lhs, [rhs], _) if cx.ty_based_def(expr).is_diag_item(cx, sym::sub) => { | ||
| ExprKind::MethodCall(_, lhs, [rhs], _) if cx.ty_based_def(expr).is_diag_item(cx, sym::sub) => { |
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Ha, nice that this finds a real case in clippy.
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@bors r+ rollup |
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Rollup of 11 pull requests Successful merges: - #151378 (Codegen tests for Arm Cortex-R82) - #151936 (Move the `fingerprint_style` special case into `DepKindVTable` creation) - #152018 (Move bigint helper tracking issues) - #151958 (Add codegen test for SLP vectorization) - #151974 (Update documentation for `Result::ok()`) - #151975 (Work around rustfmt giving up on a large expression) - #151990 (Fix missing unused_variables lint when using a match guard) - #151995 (stabilize ptr_as_ref_unchecked) - #151999 (attribute parsing: pass recovery mode to Parser.) - #152009 (Port rustc_preserve_ub_checks to attr parser) - #152022 (rustc-dev-guide subtree update) Failed merges: - #151968 (Remove `HasDepContext` by merging it into `QueryContext`)
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Rollup of 11 pull requests Successful merges: - rust-lang/rust#151378 (Codegen tests for Arm Cortex-R82) - rust-lang/rust#151936 (Move the `fingerprint_style` special case into `DepKindVTable` creation) - rust-lang/rust#152018 (Move bigint helper tracking issues) - rust-lang/rust#151958 (Add codegen test for SLP vectorization) - rust-lang/rust#151974 (Update documentation for `Result::ok()`) - rust-lang/rust#151975 (Work around rustfmt giving up on a large expression) - rust-lang/rust#151990 (Fix missing unused_variables lint when using a match guard) - rust-lang/rust#151995 (stabilize ptr_as_ref_unchecked) - rust-lang/rust#151999 (attribute parsing: pass recovery mode to Parser.) - rust-lang/rust#152009 (Port rustc_preserve_ub_checks to attr parser) - rust-lang/rust#152022 (rustc-dev-guide subtree update) Failed merges: - rust-lang/rust#151968 (Remove `HasDepContext` by merging it into `QueryContext`)
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Within a binding pattern match guard, only real reads of a bound local impact its liveness analysis - not the fake read that is injected.
Fixes #151983
r? compiler