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Always report reachability for user-supplied patterns

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This commit is contained in:
Nadrieril 2021-09-13 15:47:24 +01:00
parent 2bf6e7880d
commit 003bbcb799
1 changed files with 3 additions and 8 deletions
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11
compiler/rustc_mir_build/src/thir/pattern/check_match.rs
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@ -434,14 +434,9 @@ fn check_let_reachability<'p, 'tcx>(
let arms = [MatchArm { pat, hir_id: pat_id, has_guard: false }];
let report = compute_match_usefulness(&cx, &arms, pat_id, pat.ty);
match let_source(cx.tcx, pat_id) {
LetSource::IfLet | LetSource::WhileLet | LetSource::IfLetGuard => {
report_arm_reachability(&cx, &report, |arm_span, arm_hir_id, _| {
unreachable_pattern(cx.tcx, arm_span, arm_hir_id, None)
});
}
_ => {}
}
report_arm_reachability(&cx, &report, |arm_span, arm_hir_id, _| {
unreachable_pattern(cx.tcx, arm_span, arm_hir_id, None)
});
if report.non_exhaustiveness_witnesses.is_empty() {
// The match is exhaustive, i.e. the `if let` pattern is irrefutable.