http://bugs.freedesktop.org/show_bug.cgi?id=17415

           Summary: segfault when run glxinfo and some 3D games(openarena
                    and ut2004)
           Product: Mesa
           Version: unspecified
          Platform: Other
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i915
        AssignedTo: dri-devel@lists.sourceforge.net
        ReportedBy: [EMAIL PROTECTED]
                CC: [EMAIL PROTECTED]


Created an attachment (id=18643)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=18643)
xorg.0.log

System Environment:
--------------------------
Host:           945g
Arch:           i386
Kernel:         2.6.27-rc5
Libdrm:master           cd7d71f19cf2a16521c9da1815421c6a5f12a58e
Mesa:master     0fd1a8c4a1201f3508cb6a98dc1c66ab9ebd919f
Xserver:master          7c5ca85a9e6d49ab572831b3e0c08bb4cafb395e
Xf86_video_intel:master         57ad9cc689724a2f3583eda862250eab0a6798d5

Bug detailed description:
--------------------------
start X,then run glxinfo or other 3D games ,we will get Segmentation
fault.following is the backtrace from GDB:
**********************************************
#0  0xb7c4a601 in intel_update_renderbuffers (context=0x94a7578,
    drawable=0x9776cd8) at intel_context.c:227
#1  0xb7c4a94c in intelMakeCurrent (driContextPriv=0x94a7578,
    driDrawPriv=0x9776cd8, driReadPriv=0x9776cd8) at intel_context.c:925
#2  0xb7c278ee in driBindContext (pcp=0x94a7578, pdp=0x9776cd8, prp=0x9776cd8)
    at ../common/dri_util.c:203
#3  0xb7fc907c in driBindContext (context=0x94a1e98, draw=0x951b278,
    read=0x951b278) at dri_glx.c:457
#4  0xb7fa7f3d in MakeContextCurrent (dpy=0x949a008, draw=6291460,
    read=6291460, gc=0x949f370, pre13=1) at glxcurrent.c:384
#5  0xb7fa81db in glXMakeCurrent (dpy=0x949a008, draw=6291460, gc=0x949f370)
    at glxcurrent.c:509
#6  0x0804a9b6 in main (argc=1, argv=0xbf8f2824) at glxinfo.c:463
************************************************

Reproduce steps:
----------------
1.xinit&
2../glxinfo


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