(gdb) bt full
#0  0x00007f6f67834491 in dixGetPrivate (key=0x7f6f67a615e0 <glamor_pixmap_private_key_index>, privates=0xf38250) at /usr/include/xorg/privates.h:138
No locals.
#1  glamor_set_pixmap_private (pixmap=0xf38230, priv=priv@entry=0x0) at /var/tmp/portage/x11-libs/glamor-9999/work/glamor-9999/src/glamor.c:476
        old_priv = 0xf38c30
        fbo = <optimized out>
#2  0x00007f6f6783464d in glamor_close_screen (screen=0xf35900) at /var/tmp/portage/x11-libs/glamor-9999/work/glamor-9999/src/glamor.c:530
        glamor_priv = 0xf38f80
        screen_pixmap = <optimized out>
        flags = 15
        ps = 0xf38c30
#3  0x0000000000474825 in DPMSClose (pScreen=0xf35900) at /var/tmp/portage/x11-base/xorg-server-1.14.0/work/xorg-server-1.14.0/hw/xfree86/common/xf86DPMS.c:130
        pDPMS = 0x6168433a434e5953
        pScrn = 0x10
#4  0x000000000056bb1f in miDCCloseScreen (pScreen=0xf35900) at /var/tmp/portage/x11-base/xorg-server-1.14.0/work/xorg-server-1.14.0/mi/midispcur.c:156
        pScreenPriv = 0x14775c0
#5  0x0000000000514550 in damageCloseScreen (pScreen=0xf35900) at /var/tmp/portage/x11-base/xorg-server-1.14.0/work/xorg-server-1.14.0/miext/damage/damage.c:1659
        pScrPriv = 0xf38230
#6  0x0000000000576331 in miPointerCloseScreen (pScreen=0xf35900) at /var/tmp/portage/x11-base/xorg-server-1.14.0/work/xorg-server-1.14.0/mi/mipointer.c:165
        pScreenPriv = 0xf38230
#7  0x000000000057b540 in miSpriteCloseScreen (pScreen=0xf35900) at /var/tmp/portage/x11-base/xorg-server-1.14.0/work/xorg-server-1.14.0/mi/misprite.c:385
        pScreenPriv = 0x150d400
#8  0x00000000004ba148 in xf86CursorCloseScreen (pScreen=0xf35900) at /var/tmp/portage/x11-base/xorg-server-1.14.0/work/xorg-server-1.14.0/hw/xfree86/ramdac/xf86Cursor.c:152
        pScrn = 0xe91120
        PointPriv = 0x14772f0
        ScreenPriv = 0x14f85b0
#9  0x00007f6f65faffab in RADEONCloseScreen_KMS (pScreen=0xf35900) at /var/tmp/portage/x11-drivers/xf86-video-ati-9999/work/xf86-video-ati-9999/src/radeon_kms.c:1075
        pScrn = 0xe91120
        info = 0xe99e00
#10 0x00000000004f2d26 in RRCloseScreen (pScreen=0xf35900) at /var/tmp/portage/x11-base/xorg-server-1.14.0/work/xorg-server-1.14.0/randr/randr.c:105
        pScrPriv = 0x150ed20
        j = -1
#11 0x00000000004abf83 in xf86CrtcCloseScreen (screen=0xf35900) at /var/tmp/portage/x11-base/xorg-server-1.14.0/work/xorg-server-1.14.0/hw/xfree86/modes/xf86Crtc.c:732
        scrn = <optimized out>
        config = 0xf2e5c0
        o = <optimized out>
        c = <optimized out>
#12 0x00000000004283b1 in main (argc=1, argv=0x7fffc7751428, envp=<optimized out>) at /var/tmp/portage/x11-base/xorg-server-1.14.0/work/xorg-server-1.14.0/dix/main.c:337
        pScreen = 0xf35900
        i = 0
        alwaysCheckForInput = {0, 1}