From 88db589e7f965e5b16b82eca76f2e1febd82d124 Mon Sep 17 00:00:00 2001
From: Yukihiro Matsumoto <matz@ruby-lang.org>
Date: Wed, 20 Jun 2012 15:12:35 +0900
Subject: protect crash from empty irep

---
 src/vm.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src')

diff --git a/src/vm.c b/src/vm.c
index 826cdafef..c78799c6d 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -788,6 +788,10 @@ mrb_run(mrb_state *mrb, struct RProc *proc, mrb_value self)
         /* setup environment for calling method */
         proc = m;
         irep = m->body.irep;
+	if (!irep) {
+	  mrb->stack[0] = mrb_nil_value();
+	  goto L_RETURN;
+	}
         pool = irep->pool;
         syms = irep->syms;
         ci->nregs = irep->nregs;
-- 
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