Bug 71482

Just using LibreOffice to edit some slides, I got 3x in a row (I now have it
running under gdb) over the course of 30minutes editing some slides. Drat -
I've lost the Xorg.0.log.old as well, but nevertheless this is a pretty
annoying one ... I have an openSUSE 13.1 with xf86-video-intel-2.99.905-1.1.i586

Program received signal SIGSEGV, Segmentation fault.
#0  sna_do_copy (src=src@entry=0xb751dc0, dst=dst@entry=0xb357808,
gc=gc@entry=0xb34f318, sx=sx@entry=0, sy=sy@entry=0, width=width@entry=300, hei
    bitPlane=bitPlane@entry=0, closure=closure@entry=0x0) at sna_accel.c:6097
#1  0xb6c209f6 in sna_copy_area (src=0xb751dc0, dst=0xb357808, gc=0xb34f318,
src_x=0, src_y=0, width=300, height=213, dst_x=5, dst_y=-115) at sna_
#2  0x0807ab3f in ProcCopyArea (client=0xac8e7e8) at dispatch.c:1626
#3  0x0807ed8d in Dispatch () at dispatch.c:432
#4  0x0806ce2a in main (argc=12, argv=0xbffacf64, envp=0xbffacf98) at
main.c:298

Suggested patch is:

--- xf86-video-intel-2.99.905/src/sna_accel.c
+++ xf86-video-intel-2.99.905/src/sna_accel.c
@@ -6094,7 +6094,7 @@
 	     region.extents.x1, region.extents.y1,
 	     region.extents.x2, region.extents.y2));
 
-	if (!box_intersect(&region.extents, &gc->pCompositeClip->extents)) {
+	if (gc->pCompositeClip && !box_intersect(&region.extents, &gc->pCompositeClip->extents)) {
 		DBG(("%s: dst clipped out\n", __FUNCTION__));
 		return NULL;
 	}

The gc's pCompositeClip is NULL when using my slide deck under the 'master view' on this hardware.

HTH !