diff options
Diffstat (limited to 'proc.c')
-rw-r--r-- | proc.c | 4 |
1 files changed, 3 insertions, 1 deletions
@@ -722,9 +722,11 @@ rb_block_arity(void) rb_thread_t *th = GET_THREAD(); rb_control_frame_t *cfp = th->cfp; rb_block_t *block = rb_vm_control_frame_block_ptr(cfp); - VALUE proc_value = block->proc; + VALUE proc_value; + if (!block) rb_raise(rb_eArgError, "no block given"); min = rb_block_min_max_arity(block, &max); + proc_value = block->proc; if (proc_value) { rb_proc_t *proc; GetProcPtr(proc_value, proc); |