1 files changed, 9 insertions, 0 deletions
diff --git a/compiler/rustc_infer/src/infer/lub.rs b/compiler/rustc_infer/src/infer/lub.rs
index d6e56fcb7..97ed4729b 100644
--- a/compiler/rustc_infer/src/infer/lub.rs
+++ b/compiler/rustc_infer/src/infer/lub.rs
@@ -30,6 +30,11 @@ impl<'tcx> TypeRelation<'tcx> for Lub<'_, '_, 'tcx> {
         "Lub"
     }
 
+    fn intercrate(&self) -> bool {
+        assert!(!self.fields.infcx.intercrate);
+        false
+    }
+
     fn tcx(&self) -> TyCtxt<'tcx> {
         self.fields.tcx()
     }
@@ -42,6 +47,10 @@ impl<'tcx> TypeRelation<'tcx> for Lub<'_, '_, 'tcx> {
         self.a_is_expected
     }
 
+    fn mark_ambiguous(&mut self) {
+        bug!("mark_ambiguous used outside of coherence");
+    }
+
     fn relate_with_variance<T: Relate<'tcx>>(
         &mut self,
         variance: ty::Variance,