Assert if inference vars are leaking from fully_resolve

rust-lang · Oct 24, 2022 · 1727c00 · 1727c00
1 parent c07a6a9
commit 1727c00
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/compiler/rustc_infer/src/infer/mod.rs b/compiler/rustc_infer/src/infer/mod.rs
@@ -1469,7 +1469,12 @@ impl<'tcx> InferCtxt<'tcx> {
          * except during the writeback phase.
          */
 
-        resolve::fully_resolve(self, value)
+        let value = resolve::fully_resolve(self, value);
+        assert!(
+            value.as_ref().map_or(true, |value| !value.needs_infer()),
+            "`{value:?}` is not fully resolved"
+        );
+        value
     }
 
     pub fn replace_bound_vars_with_fresh_vars<T>(