Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb7aa46b0 (LWP 9062)]
0xb773a5ad in radeon_update_renderbuffers (context=0x99188c0, drawable=0x9c37a58)
    at radeon_common_context.c:455
455                     if ((radeon->is_front_buffer_rendering || !draw->color_rb[1])
(gdb) bt full
#0  0xb773a5ad in radeon_update_renderbuffers (context=0x99188c0, drawable=0x9c37a58)
    at radeon_common_context.c:455
        depth_rb = <value optimized out>
        stencil_rb = <value optimized out>
        attachments = {241, 52, 163805608, 0, 0, 2, 0, 136138740, 160477096, 241}
        buffers = <value optimized out>
        screen = (__DRIscreen *) 0x985ab90
        rb = <value optimized out>
        i = <value optimized out>
        count = <value optimized out>
        regname = <value optimized out>
        depth_bo = <value optimized out>
        bo = <value optimized out>
        __func__ = "radeon_update_renderbuffers"
#1  0xb773b05f in radeonMakeCurrent (driContextPriv=0x99188c0,
    driDrawPriv=0x9c37a58, driReadPriv=0x9c37a58) at radeon_common_context.c:652
        radeon = (radeonContextPtr) 0x98e08f0
        drfb = (struct radeon_framebuffer *) 0x0
        readfb = (struct gl_framebuffer *) 0x0
        __FUNCTION__ = "radeonMakeCurrent"
#2  0xb770d634 in driBindContext (pcp=0x99188c0, pdp=0x9c37a58, prp=0x9c37a58)
    at ../common/dri_util.c:203
        psp = (__DRIscreenPrivate *) 0x985ab90
#3  0xb7a922cc in __glXDRIcontextMakeCurrent (baseContext=0x9919a70) at glxdri2.c:205
No locals.
#4  0xb7a84ee0 in DoMakeCurrent (cl=0x98dad18, drawId=<value optimized out>,
    readId=241, contextId=4194319, tag=0) at glxcmds.c:647
---Type <return> to continue, or q <return> to quit---
        client = (ClientPtr) 0x9c37dc0
        reply = {type = 244 'ô', unused = 15 '\017', sequenceNumber = 47018,
  length = 1, contextTag = 4194319, pad2 = 3081276380, pad3 = 159596208,
  pad4 = 3081385240, pad5 = 0, pad6 = 134668193}
        glxc = (__GLXcontext *) 0x9919a70
        prevglxc = (__GLXcontext *) 0x0
        drawPriv = (__GLXdrawable *) 0x9c379a8
        readPriv = (__GLXdrawable *) 0x9c379a8
        error = <value optimized out>
        mask = <value optimized out>
        __PRETTY_FUNCTION__ = "DoMakeCurrent"
#5  0xb7a850a5 in __glXDisp_MakeCurrent (cl=0x98dad18, pc=0x98e3c60 "\227\005\004")
    at glxcmds.c:686
No locals.
#6  0xb7a87740 in __glXDispatch (client=0x9c37dc0) at glxext.c:549
        stuff = (xGLXSingleReq *) 0x98e3c60
        opcode = 5 '\005'
        retval = 1
#7  0x08090b8f in Dispatch () at dispatch.c:432
        result = <value optimized out>
        client = (ClientPtr) 0x9c37dc0
        nready = 0
        start_tick = 360
#8  0x0806932d in main (argc=5, argv=0xbfe92724, envp=0x9c379a8) at main.c:283
        i = 1
        alwaysCheckForInput = {0, 1}
(gdb)