Fix transmute goal

2024-09-27 14:24:31 -04:00
parent 38bbcc001e
commit 9453d2cfeb
9 changed files with 236 additions and 117 deletions
--- a/compiler/rustc_next_trait_solver/src/solve/trait_goals.rs
+++ b/compiler/rustc_next_trait_solver/src/solve/trait_goals.rs
@@ -627,11 +627,16 @@ where
        }

        ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx| {
+            let assume = ecx.structurally_normalize_const(
+                goal.param_env,
+                goal.predicate.trait_ref.args.const_at(2),
+            )?;
+
            let certainty = ecx.is_transmutable(
                goal.param_env,
                goal.predicate.trait_ref.args.type_at(0),
                goal.predicate.trait_ref.args.type_at(1),
-                goal.predicate.trait_ref.args.const_at(2),
+                assume,
            )?;
            ecx.evaluate_added_goals_and_make_canonical_response(certainty)
        })