From e59421db7a5cf557f39e55a47b99fd34b5895d57 Mon Sep 17 00:00:00 2001
From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 15 Dec 2014 14:24:06 +0000
Subject: 2014-12-15  Richard Biener  <rguenther@suse.de>

	* vec.h (vec::safe_grow): Guard against a grow to zero size.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@218749 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/vec.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'gcc/vec.h')

diff --git a/gcc/vec.h b/gcc/vec.h
index 2e5313dd146..ca568accdcf 100644
--- a/gcc/vec.h
+++ b/gcc/vec.h
@@ -1574,7 +1574,10 @@ vec<T, va_heap, vl_ptr>::safe_grow (unsigned len MEM_STAT_DECL)
   unsigned oldlen = length ();
   gcc_checking_assert (oldlen <= len);
   reserve_exact (len - oldlen PASS_MEM_STAT);
-  m_vec->quick_grow (len);
+  if (m_vec)
+    m_vec->quick_grow (len);
+  else
+    gcc_checking_assert (len == 0);
 }
 
 
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