Changed unused_labels lint default from allow to warn

Closes #66324.

diff --git a/src/librustc/lint/builtin.rs b/src/librustc/lint/builtin.rs
index f8a592d22c19c1a3f6ce285fa294ffa9a44a6688..8c556a09e1ebec8ecdbc26c7edba45a74eed3115 100644 (file)
--- a/src/librustc/lint/builtin.rs
+++ b/src/librustc/lint/builtin.rs
@@ -327,7 +327,7 @@
 
 declare_lint! {
     pub UNUSED_LABELS,
-    Allow,
+    Warn,
     "detects labels that are never used"
 }