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Dont ICE on copy error being suppressed due to overflow

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This commit is contained in:
Michael Goulet
2025-07-21 16:07:12 +00:00
parent 67819923ac
commit b5d36e5294
3 changed files with 36 additions and 4 deletions
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9
compiler/rustc_borrowck/src/diagnostics/move_errors.rs
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@@ -303,10 +303,11 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
}
fn has_ambiguous_copy(&mut self, ty: Ty<'tcx>) -> bool {
let Some(copy_trait_def) = self.infcx.tcx.lang_items().copy_trait() else { return false };
// This is only going to be ambiguous if there are incoherent impls, because otherwise
// ambiguity should never happen in MIR.
self.infcx.type_implements_trait(copy_trait_def, [ty], self.infcx.param_env).may_apply()
let Some(copy_def_id) = self.infcx.tcx.lang_items().copy_trait() else { return false };
// Avoid bogus move errors because of an incoherent `Copy` impl.
self.infcx.type_implements_trait(copy_def_id, [ty], self.infcx.param_env).may_apply()
&& self.infcx.tcx.coherent_trait(copy_def_id).is_err()
}
fn report_cannot_move_from_static(&mut self, place: Place<'tcx>, span: Span) -> Diag<'infcx> {