From cdc7d3908ee1b3684d8d4c9608688be371de0931 Mon Sep 17 00:00:00 2001
From: "fschneider@chromium.org"
 <fschneider@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Thu, 16 Dec 2010 12:01:22 +0000
Subject: [PATCH] Fix a SEGV in the register allocator.

This occasionally caused the regress-806 unit test to crash.

Review URL: http://codereview.chromium.org/5913002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6043 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---
 src/lithium-allocator.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lithium-allocator.cc b/src/lithium-allocator.cc
index 30b86ffe72..ac61c17ba7 100644
--- a/src/lithium-allocator.cc
+++ b/src/lithium-allocator.cc
@@ -526,7 +526,7 @@ LifetimePosition LiveRange::FirstIntersection(LiveRange* other) {
     }
     if (a->start().Value() < b->start().Value()) {
       a = a->next();
-      if (a == NULL && a->start().Value() > other->End().Value()) break;
+      if (a == NULL || a->start().Value() > other->End().Value()) break;
       AdvanceLastProcessedMarker(a, advance_last_processed_up_to);
     } else {
       b = b->next();