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Fix lint scoping for let-else. #102257

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Merged
merged 1 commit into from
Sep 26, 2022
Merged

Fix lint scoping for let-else. #102257

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43 changes: 27 additions & 16 deletions compiler/rustc_mir_build/src/build/block.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -221,27 +221,37 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {

let init = &this.thir[*initializer];
let initializer_span = init.span;
this.declare_bindings(
visibility_scope,
remainder_span,
pattern,
ArmHasGuard(false),
Some((None, initializer_span)),
);
this.visit_primary_bindings(
pattern,
UserTypeProjections::none(),
&mut |this, _, _, _, node, span, _, _| {
this.storage_live_binding(block, node, span, OutsideGuard, true);
this.schedule_drop_for_binding(node, span, OutsideGuard);
},
);
let failure = unpack!(
block = this.in_opt_scope(
opt_destruction_scope.map(|de| (de, source_info)),
|this| {
let scope = (*init_scope, source_info);
this.in_scope(scope, *lint_level, |this| {
this.declare_bindings(
visibility_scope,
remainder_span,
pattern,
ArmHasGuard(false),
Some((None, initializer_span)),
);
this.visit_primary_bindings(
pattern,
UserTypeProjections::none(),
&mut |this, _, _, _, node, span, _, _| {
this.storage_live_binding(
block,
node,
span,
OutsideGuard,
true,
);
this.schedule_drop_for_binding(
node,
span,
OutsideGuard,
);
},
);
this.ast_let_else(
block,
init,
Expand Down Expand Up @@ -306,7 +316,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
ArmHasGuard(false),
Some((None, initializer_span)),
);
this.expr_into_pattern(block, &pattern, init) // irrefutable pattern
this.expr_into_pattern(block, &pattern, init)
// irrefutable pattern
})
},
)
Expand Down