From 9e7ca5d94462c749b25a34bc2d23984ccd37d14d Mon Sep 17 00:00:00 2001
From: Yukihiro Matsumoto <matz@ruby-lang.org>
Date: Sun, 9 Sep 2012 13:14:32 +0900
Subject: mrb might be intialized incompletely from mrbc; close #457

---
 src/vm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/vm.c')

diff --git a/src/vm.c b/src/vm.c
index f6922be37..7745c0433 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -233,7 +233,7 @@ mrb_funcall_with_block(mrb_state *mrb, mrb_value self, mrb_sym mid, int argc, mr
   struct RClass *c;
   mrb_sym undef = 0;
   mrb_callinfo *ci;
-  int n = mrb->ci->nregs;
+  int n;
   mrb_value val;
 
   if (!mrb->jmp) {
@@ -250,6 +250,10 @@ mrb_funcall_with_block(mrb_state *mrb, mrb_value self, mrb_sym mid, int argc, mr
     return val;
   }
 
+  if (!mrb->stack) {
+    stack_init(mrb);
+  }
+  n = mrb->ci->nregs;
   if (argc < 0) {
     mrb_raise(mrb, E_ARGUMENT_ERROR, "negative argc for funcall (%d)", argc);
   }
-- 
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