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-rw-r--r--vm_method.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/vm_method.c b/vm_method.c
index 19852b0951..45285e0349 100644
--- a/vm_method.c
+++ b/vm_method.c
@@ -153,7 +153,7 @@ clear_method_cache_by_id_in_class(VALUE klass, ID mid)
VM_ASSERT(RB_TYPE_P(klass, T_CLASS) || RB_TYPE_P(klass, T_ICLASS));
if (rb_objspace_garbage_object_p(klass)) return;
- if (LIKELY(RCLASS_EXT(klass)->subclasses == NULL)) {
+ if (LIKELY(RCLASS_SUBCLASSES(klass) == NULL)) {
// no subclasses
// check only current class