diff options
| -rw-r--r-- | src/kernel.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/kernel.c b/src/kernel.c index 54c90dfc0..e578918af 100644 --- a/src/kernel.c +++ b/src/kernel.c @@ -507,6 +507,9 @@ mrb_obj_instance_eval(mrb_state *mrb, mrb_value self) if (mrb_get_args(mrb, "|S&", &a, &b) == 1) { mrb_raise(mrb, E_NOTIMP_ERROR, "instance_eval with string not implemented"); } + if (mrb_nil_p(b)) { + mrb_raise(mrb, E_ARGUMENT_ERROR, "no block given"); + } switch (mrb_type(self)) { case MRB_TT_SYMBOL: case MRB_TT_FIXNUM: |