> bt
#0  0x00007f8a2a123165 in raise () from /lib/libc.so.6
#1  0x00007f8a2a125f70 in abort () from /lib/libc.so.6
#2  0x00007f8a2a11c2b1 in __assert_fail () from /lib/libc.so.6
#3  0x00000000004fa873 in SecurityAuthorizationExpired (timer=0x27f1a70, time=263664301, pval=0x2805a80) at ../../Xext/security.c:315
#4  0x0000000000472535 in TimerSet (timer=0x27f1a70, flags=0, millis=263664005, func=0x4fa82b <SecurityAuthorizationExpired>, arg=0x2805a80) at ../../os/WaitFor.c:472
#5  0x00000000004fa8f4 in SecurityStartAuthorizationTimer (pAuth=0x2805a80) at ../../Xext/security.c:346
#6  0x00000000004fae9d in ProcSecurityGenerateAuthorization (client=0x28058c0) at ../../Xext/security.c:571
#7  0x00000000004fb1dc in ProcSecurityDispatch (client=0x28058c0) at ../../Xext/security.c:642
#8  0x000000000044cdf6 in Dispatch () at ../../dix/dispatch.c:431
#9  0x0000000000425a4b in main (argc=8, argv=0x7fff0ec00548, envp=0x7fff0ec00590) at ../../dix/main.c:287

> bt full
#0  0x00007f8a2a123165 in raise () from /lib/libc.so.6
No symbol table info available.
#1  0x00007f8a2a125f70 in abort () from /lib/libc.so.6
No symbol table info available.
#2  0x00007f8a2a11c2b1 in __assert_fail () from /lib/libc.so.6
No symbol table info available.
#3  0x00000000004fa873 in SecurityAuthorizationExpired (timer=0x27f1a70, time=263664301, pval=0x2805a80) at ../../Xext/security.c:315
        pAuth = 0x2805a80
        __PRETTY_FUNCTION__ = "SecurityAuthorizationExpired"
#4  0x0000000000472535 in TimerSet (timer=0x27f1a70, flags=0, millis=263664005, func=0x4fa82b <SecurityAuthorizationExpired>, arg=0x2805a80) at ../../os/WaitFor.c:472
        prev = 0x4fa82b
        now = 263664301
#5  0x00000000004fa8f4 in SecurityStartAuthorizationTimer (pAuth=0x2805a80) at ../../Xext/security.c:346
No locals.
#6  0x00000000004fae9d in ProcSecurityGenerateAuthorization (client=0x28058c0) at ../../Xext/security.c:571
        stuff = 0x27f2930
        len = 10
        removeAuth = 1
        pAuth = 0x2805a80
        err = 0
        authId = 178
        rep = {type = 0 '\000', pad0 = 0 '\000', sequenceNumber = 0, length = 0, authId = 4635787, dataLength = 0, pad1 = 0, pad2 = 0, pad3 = 0, pad4 = 14, pad5 = 0}
        trustLevel = 1
        group = 0
        timeout = 1000000000
        values = 0x27f2958
        protoname = 0x27f293c "MIT-MAGIC-COOKIE-1"
        protodata = 0x27f2941 "AGIC-COOKIE-1"
        authdata_len = 16
        pAuthdata = 0x881980 "\211%4\262A\022\264\276\267\345\377\212\230\036=\226"
        eventMask = 0
#7  0x00000000004fb1dc in ProcSecurityDispatch (client=0x28058c0) at ../../Xext/security.c:642
        stuff = 0x27f2930
#8  0x000000000044cdf6 in Dispatch () at ../../dix/dispatch.c:431
        clientReady = 0x2784440
        result = 0
        client = 0x28058c0
        nready = 0
        icheck = 0x884b30
        start_tick = 140
#9  0x0000000000425a4b in main (argc=8, argv=0x7fff0ec00548, envp=0x7fff0ec00590) at ../../dix/main.c:287
        i = 1
        alwaysCheckForInput = {0, 1}

> frame 3
#3  0x00000000004fa873 in SecurityAuthorizationExpired (timer=0x27f1a70, time=263664301, pval=0x2805a80) at ../../Xext/security.c:315
315	    assert(pAuth->timer == timer);

> p pAuth->timer
$1 = (OsTimerPtr) 0x0

> p timer
$2 = (OsTimerPtr) 0x27f1a70