[BUG] X.Org X Server 1.12.99.903 segfaults on linux 3.5

[Knut Petersen]

Xorg (full build of the git current git tree) running on a linux 3.5 PC with intel 915GM graphics
segfaults reliably during server shutdown, see Bug 52440. <https://bugs.freedesktop.org/show_bug.cgi?id=52440>

Program received signal SIGSEGV, Segmentation fault.
0x081a8624 in RRCrtcDetachScanoutPixmap (crtc=0x834ed80) at rrcrtc.c:370
370
(gdb) bt f
#0  0x081a8624 in RRCrtcDetachScanoutPixmap (crtc=0x834ed80) at rrcrtc.c:370
         master = 0x18
         ret = -1223076295
         mscreenpix = 0x8338b70
         pScrPriv = 0xb70c4ce0
#1  0x08112ba6 in xf86CrtcCloseScreen (screen=0x8350fe0) at xf86Crtc.c:738
         crtc = 0x83398b0
         scrn = 0x83380a8
         config = 0x8338b70
         o = 7
         c = 1
#2  0x080cb14d in DGACloseScreen (pScreen=0x8350fe0) at xf86DGA.c:288
         pScreenPriv = 0x835a3f0
#3  0x080cf751 in DPMSClose (pScreen=0x8350fe0) at xf86DPMS.c:130
         pDPMS = 0x8372430
         pScrn = 0x83380a8
#4  0x0814abe7 in XvCloseScreen (pScreen=0x8350fe0) at xvmain.c:311
         pxvs = 0x8351390
#5  0x081cd078 in SyncCloseScreen (pScreen=0x8350fe0) at misync.c:172
         pScreenPriv = 0x8372444
#6  0x08136d3c in CursorCloseScreen (pScreen=0x8350fe0) at cursor.c:205
         cs = 0x83610c8
         ret = 136096396
         close_proc = 0x8136ca0 <CursorCloseScreen>
         display_proc = 0x8136ad5 <CursorDisplayCursor>
         constrain_proc = 0x8138df1 <CursorConstrainCursorHarder>
#7  0x081cabb4 in AnimCurCloseScreen (pScreen=0x8350fe0) at animcur.c:106
         as = 0x8365460
         ret = -1074366248
#8  0x081322af in compCloseScreen (pScreen=0x8350fe0) at compinit.c:85
         cs = 0x83660c0
         ret = -1222052928
#9  0x080d6650 in VidModeClose (pScreen=0x8350fe0) at xf86VidMode.c:111
         pVidMode = 0x8366638
#10 0xb700f981 in glxCloseScreen (pScreen=Cannot access memory at address 0xbff67960
) at glxscreens.c:188
         pGlxScreen = <error reading variable pGlxScreen (Cannot access memory at address 0xbff6794c)>
Cannot access memory at address 0xbff6795c

cu,
  Knut
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