#0  DRI2WaitSwap (client=0x29ef640, pDrawable=<value optimized out>) at ../../../../hw/xfree86/dri2/dri2.c:769
        pPriv = <value optimized out>
#1  0x00007f49e9d6cf78 in __glXDRIcontextWait (baseContext=<value optimized out>, cl=0x29ef768, error=0x27b40b0)
    at ../../glx/glxdri2.c:304
No locals.
#2  0x00007f49e9d622cb in __glXForceCurrent (cl=0x29ef768, tag=1, error=0x7fff8c0af1ec) at ../../glx/glxext.c:461
        cx = 0x278dad0
#3  0x00007f49e9d664f6 in DoGetString (cl=0x29ef768, pc=0x2b0c1c0 "\232\201\003", need_swap=0 '\000')
    at ../../glx/single2.c:326
        client = <value optimized out>
        cx = <value optimized out>
        name = <value optimized out>
        string = <value optimized out>
        sw = 0 '\000'
        error = <value optimized out>
        buf = <value optimized out>
        buf1 = <value optimized out>
        length = <value optimized out>
#4  0x00007f49e9d628a2 in __glXDispatch (client=0x29ef640) at ../../glx/glxext.c:600
        stuff = 0x2b0c1c0
        opcode = <value optimized out>
        cl = 0x29ef768
        retval = <value optimized out>
#5  0x0000000000448909 in ?? ()
No symbol table info available.
#6  0x00000000004257ab in _start ()
No symbol table info available.