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Check allow instantiating object trait binder when upcasting and in new solver

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This commit is contained in:
Michael Goulet
2024-09-25 19:19:22 -04:00
parent 58420a065b
commit d4ee408afc
8 changed files with 70 additions and 51 deletions
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6
compiler/rustc_next_trait_solver/src/solve/trait_goals.rs
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@@ -896,7 +896,7 @@ where
&& ecx
.probe(|_| ProbeKind::UpcastProjectionCompatibility)
.enter(|ecx| -> Result<(), NoSolution> {
ecx.eq(param_env, source_projection, target_projection)?;
ecx.sub(param_env, source_projection, target_projection)?;
let _ = ecx.try_evaluate_added_goals()?;
Ok(())
})
@@ -909,7 +909,7 @@ where
// Check that a's supertrait (upcast_principal) is compatible
// with the target (b_ty).
ty::ExistentialPredicate::Trait(target_principal) => {
ecx.eq(
ecx.sub(
param_env,
upcast_principal.unwrap(),
bound.rebind(target_principal),
@@ -934,7 +934,7 @@ where
Certainty::AMBIGUOUS,
);
}
ecx.eq(param_env, source_projection, target_projection)?;
ecx.sub(param_env, source_projection, target_projection)?;
}
// Check that b_ty's auto traits are present in a_ty's bounds.
ty::ExistentialPredicate::AutoTrait(def_id) => {