From a925c32cca224bf8d839fa420c524213c6cb340f Mon Sep 17 00:00:00 2001
From: "Ricardo M. Correia" <rcorreia@wizy.org>
Date: Sat, 23 Apr 2011 01:26:16 +0200
Subject: [PATCH] Fix segfault when we're unable to create the lock file.

---
 init.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/init.cpp b/init.cpp
index 8f721812257..a8e93140b3b 100644
--- a/init.cpp
+++ b/init.cpp
@@ -326,7 +326,7 @@ bool AppInit2(int argc, char* argv[])
     // Make sure only a single bitcoin process is using the data directory.
     string strLockFile = GetDataDir() + "/.lock";
     FILE* file = fopen(strLockFile.c_str(), "a"); // empty lock file; created if it doesn't exist.
-    fclose(file);
+    if (file) fclose(file);
     static boost::interprocess::file_lock lock(strLockFile.c_str());
     if (!lock.try_lock())
     {