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only erase param env regions where needed

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This commit is contained in:
lcnr 2023-10-26 12:19:23 +02:00
parent 57253552de
commit a582e9638b
2 changed files with 2 additions and 2 deletions
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2
compiler/rustc_middle/src/ty/util.rs
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@ -1107,7 +1107,7 @@ impl<'tcx> Ty<'tcx> {
// This doesn't depend on regions, so try to minimize distinct
// query keys used.
// If normalization fails, we just use `query_ty`.
let param_env = tcx.erase_regions(param_env);
debug_assert!(!param_env.has_infer());
let query_ty = tcx
.try_normalize_erasing_regions(param_env, query_ty)
.unwrap_or_else(|_| tcx.erase_regions(query_ty));

2
compiler/rustc_trait_selection/src/traits/query/dropck_outlives.rs
View File

@ -298,7 +298,7 @@ pub fn dtorck_constraint_for_ty_inner<'tcx>(
// While we conservatively assume that all coroutines require drop
// to avoid query cycles during MIR building, we can check the actual
// witness during borrowck to avoid unnecessary liveness constraints.
if args.witness().needs_drop(tcx, param_env) {
if args.witness().needs_drop(tcx, tcx.erase_regions(param_env)) {
constraints.outlives.extend(args.upvar_tys().iter().map(ty::GenericArg::from));
constraints.outlives.push(args.resume_ty().into());
}