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Diffstat (limited to 'crates/hir-ty/src/next_solver/mapping.rs')
| -rw-r--r-- | crates/hir-ty/src/next_solver/mapping.rs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/crates/hir-ty/src/next_solver/mapping.rs b/crates/hir-ty/src/next_solver/mapping.rs index 4696cf479c..20cd8626f2 100644 --- a/crates/hir-ty/src/next_solver/mapping.rs +++ b/crates/hir-ty/src/next_solver/mapping.rs @@ -1148,6 +1148,13 @@ pub(crate) fn convert_ty_for_result<'db>(interner: DbInterner<'db>, ty: Ty<'db>) }), ); + // Rust and chalk have slightly different + // representation for trait objects. + // + // Chalk uses `for<T0> for<'a> T0: Trait<'a>` while rustc + // uses `ExistentialPredicate`s, which do not have a self ty. + // We need to shift escaping bound vars by 1 to accommodate + // the newly introduced `for<T0>` binder. let p = shift_vars(interner, p, 1); let where_clause = match p.skip_binder() { |