File CVE-2022-1286.patch of Package mruby

diff -Nur old/src/class.c new/src/class.c
--- old/src/class.c	2023-02-15 19:48:06.910773088 +0100
+++ new/src/class.c	2023-02-15 19:48:22.539076311 +0100
@@ -2363,7 +2363,10 @@
   MRB_CLASS_ORIGIN(c);
   h = c->mt;
 
-  if (h && mt_del(mrb, h, mid)) return;
+  if (h && mt_del(mrb, h, mid)) {
+    mrb_mc_clear_by_class(mrb, c);
+    return;
+  }
   mrb_name_error(mrb, mid, "method '%n' not defined in %C", mid, c);
 }