1 files changed, 10 insertions, 0 deletions
diff --git a/compiler/rustc_hir_typeck/src/intrinsicck.rs b/compiler/rustc_hir_typeck/src/intrinsicck.rs
index c2dc14024..3c873024c 100644
--- a/compiler/rustc_hir_typeck/src/intrinsicck.rs
+++ b/compiler/rustc_hir_typeck/src/intrinsicck.rs
@@ -105,6 +105,16 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         } else {
             err.note(&format!("source type: `{}` ({})", from, skeleton_string(from, sk_from)))
                 .note(&format!("target type: `{}` ({})", to, skeleton_string(to, sk_to)));
+            let mut should_delay_as_bug = false;
+            if let Err(LayoutError::Unknown(bad_from)) = sk_from && bad_from.references_error() {
+                should_delay_as_bug = true;
+            }
+            if let Err(LayoutError::Unknown(bad_to)) = sk_to && bad_to.references_error() {
+                should_delay_as_bug = true;
+            }
+            if should_delay_as_bug {
+                err.delay_as_bug();
+            }
         }
         err.emit();
     }