Comment 18 for bug 780961

Using the debug packages you provided in #3, I get a different traceback. It's consistent across crashes, except for a few values.

Program received signal SIGUSR1, User defined signal 1.
0x00007f3a9ac43123 in select () from /lib/x86_64-linux-gnu/libc.so.6
#0 0x00007f3a9ac43123 in select () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1 0x000000000045d07b in WaitForSomething (pClientsReady=0x4223ef0) at ../../os/WaitFor.c:232
        i = <value optimized out>
        waittime = {tv_sec = 113, tv_usec = 785619}
        wt = 0x7fff3c80b140
        timeout = <value optimized out>
        clientsReadable = {fds_bits = {0 <repeats 16 times>}}
        clientsWritable = {fds_bits = {37909264, 4358308, 16777220, 140734208454804, 0, 67767824, 0, 32, 69320416, 4527564, 70041344, 4583109, 140734208454960, 32, 0, 0}}
        selecterr = <value optimized out>
        nready = 0
        devicesReadable = {fds_bits = {16777220, 140734208454888, 70041344, 4763888, 70041344, 16777220, 1073741825, 70314624, 0, 0, 16, 0, 48, 140734208454800, 140734208454720, 66656480}}
        now = <value optimized out>
        someReady = <value optimized out>
#2 0x0000000000434f42 in Dispatch () at ../../dix/dispatch.c:367
        clientReady = 0x4223ef0
        result = <value optimized out>
        client = <value optimized out>
        nready = <value optimized out>
        icheck = 0x7f1430
        start_tick = <value optimized out>
#3 0x0000000000421a7e in main (argc=6, argv=<value optimized out>, envp=<value optimized out>) at ../../dix/main.c:287
        i = <value optimized out>
        alwaysCheckForInput = {0, 1}

Program received signal SIGSEGV, Segmentation fault.
0x00000000004455b5 in PlayReleasedEvents () at ../../dix/events.c:1188
 in ../../dix/events.c

Here's a diff from another run:

-0x00007f9a453a2123 in select () from /lib/x86_64-linux-gnu/libc.so.6
+0x00007f3a9ac43123 in select () from /lib/x86_64-linux-gnu/libc.so.6

 Program received signal SIGUSR1, User defined signal 1.
-0x00007f9a453a2123 in select () from /lib/x86_64-linux-gnu/libc.so.6
-#0 0x00007f9a453a2123 in select () from /lib/x86_64-linux-gnu/libc.so.6
+0x00007f3a9ac43123 in select () from /lib/x86_64-linux-gnu/libc.so.6
+#0 0x00007f3a9ac43123 in select () from /lib/x86_64-linux-gnu/libc.so.6
 No symbol table info available.
-#1 0x000000000045d07b in WaitForSomething (pClientsReady=0x2999ef0) at ../../os/WaitFor.c:232
+#1 0x000000000045d07b in WaitForSomething (pClientsReady=0x4223ef0) at ../../os/WaitFor.c:232
         i = <value optimized out>
- waittime = {tv_sec = 113, tv_usec = 244163}
- wt = 0x7fffd55c06e0
+ waittime = {tv_sec = 113, tv_usec = 785619}
+ wt = 0x7fff3c80b140
         timeout = <value optimized out>
         clientsReadable = {fds_bits = {0 <repeats 16 times>}}
- clientsWritable = {fds_bits = {12178192, 4358308, 16777220, 140736772965940, 0, 42036752, 0, 32, 44737920, 4527564, 44300576, 4583109, 140736772966096, 32, 0, 0}}
+ clientsWritable = {fds_bits = {37909264, 4358308, 16777220, 140734208454804, 0, 67767824, 0, 32, 69320416, 4527564, 70041344, 4583109, 140734208454960, 32, 0, 0}}
         selecterr = <value optimized out>
         nready = 0
- devicesReadable = {fds_bits = {16777220, 140736772966024, 44300576, 4763888, 44300576, 16777220, 1073741825, 44409232, 0, 0, 16, 0, 48, 140736772965936, 140736772965856, 40925408}}
+ devicesReadable = {fds_bits = {16777220, 140734208454888, 70041344, 4763888, 70041344, 16777220, 1073741825, 70314624, 0, 0, 16, 0, 48, 140734208454800, 140734208454720, 66656480}}
         now = <value optimized out>
         someReady = <value optimized out>
 #2 0x0000000000434f42 in Dispatch () at ../../dix/dispatch.c:367
- clientReady = 0x2999ef0
+ clientReady = 0x4223ef0
         result = <value optimized out>
         client = <value optimized out>
         nready = <value optimized out>