.
Thread 3 (Thread 2357):
#0  0x00007f1e97835e33 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = 18446744073709551100
        oldtype = 0
        result = <value optimized out>
#1  0x00007f1e98b82104 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f1e98b829f2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f1e8166769b in ?? () from /usr/lib/gio/modules/libdconfsettings.so
No symbol table info available.
#4  0x00007f1e98ba93e4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f1e984add8c in start_thread (arg=0x7f1e81662700) at pthread_create.c:304
        pd = 0x7f1e81662700
        now = <value optimized out>
        unwind_buf = {
          cancel_jmp_buf = {{
              jmp_buf = {139768996701952, 179857103099857188, 140733649449232, 139768996702656, 0, 3, -269096841516611292, -269147799172609756}, 
              mask_was_saved = 0
            }}, 
          priv = {
            pad = {0x0, 0x0, 0x0, 0x0}, 
            data = {
              prev = 0x0, 
              cleanup = 0x0, 
              canceltype = 0
            }
          }
        }
        not_first_call = 0
        robust = <value optimized out>
        sp = <value optimized out>
        freesize = <value optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f1e97842f7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#7  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 2314):
#0  0x00007f1e97835e33 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = 18446744073709551100
        oldtype = 0
        result = <value optimized out>
#1  0x00007f1e98b82104 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f1e98b829f2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f1e99babd44 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#4  0x00007f1e98ba93e4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f1e984add8c in start_thread (arg=0x7f1e950ad700) at pthread_create.c:304
        pd = 0x7f1e950ad700
        now = <value optimized out>
        unwind_buf = {
          cancel_jmp_buf = {{
              jmp_buf = {139769326262016, 179857103099857188, 140733649451232, 139769326262720, 0, 3, -269141752379012828, -269147799172609756}, 
              mask_was_saved = 0
            }}, 
          priv = {
            pad = {0x0, 0x0, 0x0, 0x0}, 
            data = {
              prev = 0x0, 
              cleanup = 0x0, 
              canceltype = 0
            }
          }
        }
        not_first_call = 0
        robust = <value optimized out>
        sp = <value optimized out>
        freesize = <value optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f1e97842f7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#7  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 2311):
#0  0x00007f1e97790d05 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <value optimized out>
        selftid = 2311
#1  0x00007f1e97794ab6 in abort () at abort.c:92
        save_stage = 2
        act = {
          __sigaction_handler = {
            sa_handler = 0x3e, 
            sa_sigaction = 0x3e
          }, 
          sa_mask = {
            __val = {139769368282734, 139769380835312, 139769368274618, 140733649453344, 139769367246946, 206158430232, 140733649453360, 140733649453136, 139769367158132, 206158430256, 140733649453384, 13788672, 7716448, 91662992, 2338042681683304287, 140733649459950}
          }, 
          sa_flags = -1752439110, 
          sa_restorer = 0x7f1e984b96ae
        }
        sigs = {
          __val = {32, 0 <repeats 15 times>}
        }
#2  0x00007f1e977897c5 in __assert_fail (assertion=0x7f1e984b8f1c "mutex->__data.__owner == 0", file=<value optimized out>, line=62, function=<value optimized out>) at assert.c:81
        buf = 0xd26600 "compiz: pthread_mutex_lock.c:62: __pthread_mutex_lock: Assertion `mutex->__data.__owner == 0' failed.\n"
#3  0x00007f1e984b040d in __pthread_mutex_lock (mutex=<value optimized out>) at pthread_mutex_lock.c:62
        __PRETTY_FUNCTION__ = "__pthread_mutex_lock"
        type = <value optimized out>
        id = <value optimized out>
#4  0x00007f1e98b7d899 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x000000000042cee8 in PrivateScreen::~PrivateScreen() ()
No symbol table info available.
#6  0x000000000042d169 in PrivateScreen::~PrivateScreen() ()
No symbol table info available.
#7  0x000000000042b215 in CompScreen::~CompScreen() ()
No symbol table info available.
#8  0x000000000042b349 in CompScreen::~CompScreen() ()
No symbol table info available.
#9  0x0000000000422989 in CompManager::fini() ()
No symbol table info available.
#10 0x0000000000423188 in main ()
No symbol table info available.