diff options
| -rw-r--r-- | compiler/rustc_middle/src/ty/mod.rs | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/compiler/rustc_middle/src/ty/mod.rs b/compiler/rustc_middle/src/ty/mod.rs index a7298af502e..e567ba05f61 100644 --- a/compiler/rustc_middle/src/ty/mod.rs +++ b/compiler/rustc_middle/src/ty/mod.rs @@ -829,14 +829,15 @@ impl<'tcx> OpaqueHiddenType<'tcx> { // Convert the type from the function into a type valid outside by mapping generic // parameters to into the context of the opaque. // - // We erase regions when doing this during HIR typeck. + // We erase regions when doing this during HIR typeck. We manually use `fold_regions` + // here as we do not want to anonymize bound variables. let this = match defining_scope_kind { - DefiningScopeKind::HirTypeck => tcx.erase_regions(self), + DefiningScopeKind::HirTypeck => fold_regions(tcx, self, |_, _| tcx.lifetimes.re_erased), DefiningScopeKind::MirBorrowck => self, }; let result = this.fold_with(&mut opaque_types::ReverseMapper::new(tcx, map, self.span)); if cfg!(debug_assertions) && matches!(defining_scope_kind, DefiningScopeKind::HirTypeck) { - assert_eq!(result.ty, tcx.erase_regions(result.ty)); + assert_eq!(result.ty, fold_regions(tcx, result.ty, |_, _| tcx.lifetimes.re_erased)); } result } |