Erase **all** regions when probing for associated types in astconv

2023-02-28 17:29:40 +00:00
parent 31f858d9a5
commit cb9852b8e6
3 changed files with 21 additions and 2 deletions
--- a/compiler/rustc_hir_analysis/src/astconv/mod.rs
+++ b/compiler/rustc_hir_analysis/src/astconv/mod.rs
@@ -2403,8 +2403,10 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                                infcx
                                    .can_eq(
                                        ty::ParamEnv::empty(),
-                                        tcx.erase_regions(impl_.self_ty()),
-                                        tcx.erase_regions(qself_ty),
+                                        impl_.self_ty(),
+                                        // Must fold past escaping bound vars too,
+                                        // since we have those at this point in astconv.
+                                        tcx.fold_regions(qself_ty, |_, _| tcx.lifetimes.re_erased),
                                    )
                            })
                            && tcx.impl_polarity(impl_def_id) != ty::ImplPolarity::Negative