diff options
Diffstat (limited to 'vm_method.c')
-rw-r--r-- | vm_method.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/vm_method.c b/vm_method.c index 557583f5aa..d1c68b58f3 100644 --- a/vm_method.c +++ b/vm_method.c @@ -857,6 +857,10 @@ rb_alias(VALUE klass, ID name, ID def) { rb_method_entry_t *orig_me; + if (NIL_P(klass)) { + rb_raise(rb_eTypeError, "no class to make alias"); + } + rb_frozen_class_p(klass); if (klass == rb_cObject) { rb_secure(4); |