Bug#180107: xserver-xfree86: ATI Radeon 7500: SEGV at random times, esp in xlock

[Jeffrey Baker <jwbaker@acm.org>]

As requested, the stack trace:

#0  0x40077a51 in kill () from /lib/libc.so.6
#1  0x40077872 in raise () from /lib/libc.so.6
#2  0x40078986 in abort () from /lib/libc.so.6
#3  0x0825137d in ddxGiveUp () at xf86Init.c:1094
#4  0x082b86e0 in AbortServer () at utils.c:436
#5  0x082b9985 in FatalError (f=0x85ab9e0 "Caught signal %d.  Server aborting\n")
    at utils.c:1399
#6  0x082628a8 in xf86SigHandler (signo=11) at xf86Events.c:1085
#7  0x400779d8 in sigaction () from /lib/libc.so.6
#8  0x081cefc0 in XAAPolySegment (pDrawable=0x6, pGC=0x89e45d0, nseg=0, pSeg=0x8932644)
    at xaaSeg.c:238
#9  0x0837c93e in miSpritePolySegment (pDrawable=0x882d880, pGC=0x89e45d0, nseg=1,
    pSegs=0x893263c) at misprite.c:1406
#10 0x08295fec in ProcPolySegment (client=0x87c6d70) at dispatch.c:1882
#11 0x08293967 in Dispatch () at dispatch.c:462
#12 0x082a34d4 in main (argc=9, argv=0xbffffdc4, envp=0xbffffdec) at main.c:454

pDrawable=0x6 in XAAPolySegment looks like a problem.  One level up
from that, pDrawable is a 1600x1200, depth 24, bpp 32, type 0, class
1 drawable.

-jwb