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Bail out if output_ty has bound variables

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This commit is contained in:
Dylan MacKenzie 2020-05-18 11:18:55 -07:00
parent 7278e29592
commit f99519bebb
1 changed files with 9 additions and 5 deletions
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14
src/librustc_trait_selection/traits/error_reporting/suggestions.rs
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@ -532,11 +532,15 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
};
let msg = format!("use parentheses to call the {}", callable);
let new_obligation = self.mk_trait_obligation_with_new_self_ty(
obligation.param_env,
trait_ref,
output_ty.skip_binder(),
);
// `mk_trait_obligation_with_new_self_ty` only works for types with no escaping bound
// variables, so bail out if we have any.
let output_ty = match output_ty.no_bound_vars() {
Some(ty) => ty,
None => return,
};
let new_obligation =
self.mk_trait_obligation_with_new_self_ty(obligation.param_env, trait_ref, output_ty);
match self.evaluate_obligation(&new_obligation) {
Ok(