1 files changed, 5 insertions, 0 deletions

diff --git a/crates/ra_hir_ty/src/traits/chalk/mapping.rs b/crates/ra_hir_ty/src/traits/chalk/mapping.rs
index 834360430..28a5fbe3e 100644
--- a/crates/ra_hir_ty/src/traits/chalk/mapping.rs
+++ b/crates/ra_hir_ty/src/traits/chalk/mapping.rs
@@ -482,6 +482,11 @@ impl ToChalk for GenericPredicate {
                 let ty = from_chalk(db, projection_eq.ty);
                 GenericPredicate::Projection(ProjectionPredicate { projection_ty, ty })
             }
+
+            chalk_ir::WhereClause::LifetimeOutlives(_) => {
+                // we shouldn't get these from Chalk
+                panic!("encountered LifetimeOutlives from Chalk")
+            }
         }
     }
 }