Program received signal SIGSEGV, Segmentation fault.
0x0000000000577670 in RRCrtcSet (crtc=0x8bf910, mode=0x0, x=0, y=0, rotation=1, 
    numOutputs=0, outputs=0x0) at /home/aaron/X/modular/xserver/randr/rrcrtc.c:293
293                 size.width = mode->mode.width;
(gdb) bt full
#0  0x0000000000577670 in RRCrtcSet (crtc=0x8bf910, mode=0x0, x=0, y=0, rotation=1, 
    numOutputs=0, outputs=0x0) at /home/aaron/X/modular/xserver/randr/rrcrtc.c:293
        size = {id = -718056752, width = 32767, height = 0, mmWidth = 6656, 
  mmHeight = 140, nRates = 0, pRates = 0x8c1a18}
        rate = {rate = 64432, mode = 0x78fb40}
        ret = 1
        pScrPriv = (rrScrPrivPtr) 0x7e4ec0
        pScreen = (ScreenPtr) 0x78fb40
#1  0x00000000005804e4 in ProcRRSetScreenConfig (client=0x8bdf80)
    at /home/aaron/X/modular/xserver/randr/rrscreen.c:867
        c = 0
        stuff = (xRRSetScreenConfigReq *) 0x8c0a0c
        rep = {type = 80 'P', status = 134 '\206', sequenceNumber = 126, 
  length = 0, newTimestamp = 9166720, newConfigTimestamp = 0, root = 4096, 
  subpixelOrder = 0, pad4 = 0, pad5 = 1, pad6 = 0}
        pDraw = (DrawablePtr) 0x7e9a20
        n = 0
        pScreen = (ScreenPtr) 0x78fb40
        pScrPriv = (rrScrPrivPtr) 0x7e4ec0
        configTime = {months = 0, milliseconds = 895006645}
        time = {months = 0, milliseconds = 895008191}
        i = 4096
        rotation = 1
        rate = 0
        has_rate = 1
        output = (RROutputPtr) 0x8bfbb0
        mode = (RRModePtr) 0x8bf830
        pData = (RR10DataPtr) 0x8c1a00
        pSize = (RRScreenSizePtr) 0x8c1a30
#2  0x0000000000576e1e in ProcRRDispatch (client=0x8bdf80)
    at /home/aaron/X/modular/xserver/randr/randr.c:477
        stuff = (xReq *) 0x8c0a0c
#3  0x0000000000553c74 in XaceCatchExtProc (client=0x8bdf80)
    at /home/aaron/X/modular/xserver/Xext/xace.c:299
        stuff = (xReq *) 0x0
        major = 153
        ext = (ExtensionEntry *) 0x7e8650
#4  0x000000000044b868 in Dispatch ()
    at /home/aaron/X/modular/xserver/dix/dispatch.c:511
        clientReady = (int *) 0x7fffd5335420
        result = 24
        client = (ClientPtr) 0x8bdf80
        nready = 0
        icheck = (HWEventQueuePtr *) 0x7704f0
        start_tick = 40
#5  0x0000000000432456 in main (argc=1, argv=0x7fffd53359c8, envp=0x7fffd53359d8)
    at /home/aaron/X/modular/xserver/dix/main.c:469
        i = 1
        j = 2
        k = 2
        error = -712451168
        xauthfile = 0x0
        alwaysCheckForInput = {0, 1}
(gdb) up
#1  0x00000000005804e4 in ProcRRSetScreenConfig (client=0x8bdf80)
    at /home/aaron/X/modular/xserver/randr/rrscreen.c:867
867                 rep.status = RRCrtcSet (pScrPriv->crtcs[c], NULL, 0, 0, RR_Rotate_0,
(gdb) l
862         {
863             int     c;
864
865             for (c = 0; c < pScrPriv->numCrtcs; c++)
866             {
867                 rep.status = RRCrtcSet (pScrPriv->crtcs[c], NULL, 0, 0, RR_Rotate_0,
868                                         0, NULL);
869                 if (rep.status != Success)
870                     goto sendReply;
871             }