Move frozen check out of rb_gc_impl_undefine_finalizer

1 files changed, 2 insertions, 0 deletions

diff --git a/gc.c b/gc.c
index 9c7114e5a7..b441a0beb2 100644
--- a/gc.c
+++ b/gc.c
@@ -1448,6 +1448,8 @@ os_each_obj(int argc, VALUE *argv, VALUE os)
 static VALUE
 undefine_final(VALUE os, VALUE obj)
 {
+    rb_check_frozen(obj);
+
     rb_gc_impl_undefine_finalizer(rb_gc_get_objspace(), obj);
 
     return obj;