make projection bounds with const bounds satisfy const

2022-09-18 17:38:18 +00:00
parent 4af79ccd5e
commit ee96ae0a32
5 changed files with 33 additions and 15 deletions
--- a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
@@ -68,10 +68,9 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                ImplSource::AutoImpl(data)
            }

-            ProjectionCandidate(idx) => {
+            ProjectionCandidate(idx, constness) => {
                let obligations = self.confirm_projection_candidate(obligation, idx)?;
-                // FIXME(jschievink): constness
-                ImplSource::Param(obligations, ty::BoundConstness::NotConst)
+                ImplSource::Param(obligations, constness)
            }

            ObjectCandidate(idx) => {