Add sanity Drop impl.

rust-lang-ci · Oct 1, 2022 · fec53fd · fec53fd
1 parent 299e10d
commit fec53fd
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/compiler/rustc_lint/src/levels.rs b/compiler/rustc_lint/src/levels.rs
@@ -494,6 +494,14 @@ impl<'s> LintLevelsBuilder<'s, TopDown> {
     /// Called after `push` when the scope of a set of attributes are exited.
     pub(crate) fn pop(&mut self, push: BuilderPush) {
         self.provider.cur = push.prev;
+        std::mem::forget(push);
+    }
+}
+
+#[cfg(debug_assertions)]
+impl Drop for BuilderPush {
+    fn drop(&mut self) {
+        panic!("Found a `push` without a `pop`.");
     }
 }