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Fix ICE

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This commit is contained in:
Matthew Jasper 2020-07-01 21:56:35 +01:00
parent 0dda4154bd
commit 21eccbb587
1 changed files with 5 additions and 4 deletions
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9
compiler/rustc_trait_selection/src/traits/select/confirmation.rs
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@ -342,7 +342,8 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
) -> ImplSourceObjectData<'tcx, PredicateObligation<'tcx>> {
debug!("confirm_object_candidate({:?})", obligation);
let self_ty = self.infcx.replace_bound_vars_with_placeholders(&obligation.self_ty());
let self_ty = self.infcx.shallow_resolve(obligation.self_ty());
let self_ty = self.infcx.replace_bound_vars_with_placeholders(&self_ty);
let data = match self_ty.kind() {
ty::Dynamic(data, ..) => data,
_ => span_bug!(obligation.cause.span, "object candidate with non-object"),
@ -448,7 +449,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
)
.map_bound(|(trait_ref, _)| trait_ref);
let Normalized { value: trait_ref, obligations } = ensure_sufficient_stack(|| {
let Normalized { value: trait_ref, mut obligations } = ensure_sufficient_stack(|| {
project::normalize_with_depth(
self,
obligation.param_env,
@ -458,12 +459,12 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
)
});
self.confirm_poly_trait_refs(
obligations.extend(self.confirm_poly_trait_refs(
obligation.cause.clone(),
obligation.param_env,
obligation.predicate.to_poly_trait_ref(),
trait_ref,
)?;
)?);
Ok(ImplSourceFnPointerData { fn_ty: self_ty, nested: obligations })
}