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Fix #117033

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This commit is contained in:
Nadrieril 2023-10-21 23:04:17 +02:00
parent 26f340a0d5
commit a134f1624c
2 changed files with 10 additions and 0 deletions
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3
compiler/rustc_mir_build/src/thir/pattern/usefulness.rs
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@ -884,6 +884,9 @@ fn collect_nonexhaustive_missing_variants<'p, 'tcx>(
cx: &MatchCheckCtxt<'p, 'tcx>,
column: &[&DeconstructedPat<'p, 'tcx>],
) -> Vec<WitnessPat<'tcx>> {
if column.is_empty() {
return Vec::new();
}
let ty = column[0].ty();
let pcx = &PatCtxt { cx, ty, span: DUMMY_SP, is_top_level: false };