wip

compiler/constrain/src/uniq.rs

@@ -1346,7 +1346,12 @@ pub fn constrain_expr(
                 And(vec![Eq(fn_type, expected, category, region), record_con]),
             )
         }
-        RuntimeError(_) => True,
+        RuntimeError(_) | RunLowLevel(_) => {
+            // RunLowLevel can only be added by the compiler, so it's safe
+            // to assume its constraints have already been accounted for.
+            // Runtime Errors have no constraints because they're going to crash.
+            True
+        }
     }
 }