1 files changed, 3 insertions, 0 deletions
diff --git a/eval.c b/eval.c
index 84ffab3183..7a1d6a8914 100644
--- a/eval.c
+++ b/eval.c
@@ -2009,6 +2009,9 @@ rb_alias(klass, name, def)
     if (FL_TEST(klass, FL_SINGLETON)) {
 	singleton = rb_iv_get(klass, "__attached__");
     }
+    if (RTEST(ruby_verbose) && klass == origin && orig->nd_cnt == 0 && orig->nd_body) {
+	rb_warning("discarding old %s", rb_id2name(name));
+    }
     body = orig->nd_body;
     orig->nd_cnt++;
     if (nd_type(body) == NODE_FBODY) { /* was alias */