From cab77711b3e8d398393677bcefcd413f50503a64 Mon Sep 17 00:00:00 2001
From: Vinson Lee <vlee@vmware.com>
Date: Sat, 27 Feb 2010 16:51:17 -0800
Subject: [PATCH] dri: Add assert to check for null pointer dereference.

---
 src/mesa/drivers/dri/common/dri_util.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index a4fd002..890ae513 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -127,6 +127,7 @@ static int driUnbindContext(__DRIcontext *pcp)
     /* Let driver unbind drawable from context */
     (*psp->DriverAPI.UnbindContext)(pcp);
 
+    assert(pdp);
     if (pdp->refcount == 0) {
 	/* ERROR!!! */
 	return GL_FALSE;
-- 
2.7.4