.
Thread 4 (Thread 1886):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007f64413152a2 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f644162e180) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
No locals.
#2  0x00007f64413152d9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f644163c254) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
No locals.
#3  0x00007f6442ad6d8c in start_thread (arg=0x7f6431f13700) at pthread_create.c:304
        pd = 0x7f6431f13700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140068311348992, 4238086344615836621, 140068592164352, 140068311349696, 0, 3, -4316463911673873459, -4316647150044398643}, 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"
#4  0x00007f644282204d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#5  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (Thread 1923):
#0  0x00007f6442814f03 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  0x00007f6444060104 in g_main_context_poll (context=0x1790590, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3404
        poll_func = 0x7f6444070130 <g_poll>
#2  g_main_context_iterate (context=0x1790590, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3086
        max_priority = 2147483647
        timeout = -1
        some_ready = <value optimized out>
        nfds = 1
        allocated_nfds = <value optimized out>
        fds = 0x178a990
#3  0x00007f6444060639 in g_main_context_iteration (context=0x1790590, may_block=1) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3154
        retval = <value optimized out>
#4  0x00007f6447fde3ef in QEventDispatcherGlib::processEvents (this=0x1790010, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
        d = 0x17900d0
        canWait = true
        result = <value optimized out>
#5  0x00007f6447fb2882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
        d = 0x17a5af0
#6  0x00007f6447fb2abc in QEventLoop::exec (this=0x7f64333b1bc0, flags=...) at kernel/qeventloop.cpp:201
        d = 0x17a5af0
        app = 0x7fff56cdf2b0
#7  0x00007f6447ec9924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
        d = 0x1788e80
        locker = {val = 24678160}
        eventLoop = {<QObject> = {_vptr.QObject = 0x7f64482e4910, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f644806e140 "QObject", data = 0x7f644806e1e0, extradata = 0x7f64482dc240}}, d_ptr = {d = 0x17a5af0}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f6448076e20 "Qt", data = 0x7f644807a6a0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x60b580, stringdata = 0x7f6448080640 "QEventLoop", data = 0x7f6448080660, extradata = 0x0}}}
        returnCode = <value optimized out>
#8  0x00007f6446ad9f11 in QDeclarativePixmapReader::run (this=0x1781ec0) at util/qdeclarativepixmapcache.cpp:557
No locals.
#9  0x00007f6447ecc175 in QThreadPrivate::start (arg=0x1781ec0) at thread/qthread_unix.cpp:320
        thr = 0x1781ec0
        data = 0x1790c20
#10 0x00007f6442ad6d8c in start_thread (arg=0x7f64333b2700) at pthread_create.c:304
        pd = 0x7f64333b2700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140068332971776, 4238086344615836621, 140734649716368, 140068332972480, 0, 3, -4316467810967307315, -4316647150044398643}, 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"
#11 0x00007f644282204d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#12 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 1884):
#0  0x00007f6442814f03 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  0x00007f6444060104 in g_main_context_poll (context=0x144e320, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3404
        poll_func = 0x7f6444070130 <g_poll>
#2  g_main_context_iterate (context=0x144e320, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3086
        max_priority = 2147483647
        timeout = -1
        some_ready = <value optimized out>
        nfds = 3
        allocated_nfds = <value optimized out>
        fds = 0x144e6d0
#3  0x00007f64440609f2 in g_main_loop_run (loop=0x144e300) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007f6445c55d44 in gdbus_shared_thread_func (data=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./gio/gdbusprivate.c:276
No locals.
#5  0x00007f64440873e4 in g_thread_create_proxy (data=0x144e400) at /build/buildd/glib2.0-2.28.5/./glib/gthread.c:1897
        thread = 0x144e400
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007f6442ad6d8c in start_thread (arg=0x7f643b544700) at pthread_create.c:304
        pd = 0x7f643b544700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140068468836096, 4238086344615836621, 140734649722048, 140068468836800, 0, 3, -4316485034859906099, -4316647150044398643}, 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"
#7  0x00007f644282204d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#8  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 1883):
#0  0x00007f644276fd05 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <value optimized out>
        selftid = 1883
#1  0x00007f6442773ab6 in abort () at abort.c:92
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0, sa_sigaction = 0}, sa_mask = {__val = {140068599395454, 140068684457792, 140068680438012, 140068588366752, 140068686561280, 140734649725056, 140068680117450, 4294967295, 140068589220809, 0, 140068592066264, 3076632, 0, 20716960, 0, 140068599140352}}, sa_flags = 1211063588, sa_restorer = 0x5}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f64432446dd in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#3  0x00007f6443242926 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#4  0x00007f6443242953 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#5  0x00007f6443242aa6 in __cxa_rethrow () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#6  0x00007f6447fb2bb2 in QEventLoop::exec (this=0x7fff56cdf1e0, flags=...) at kernel/qeventloop.cpp:214
        d = 0x170cec0
        app = 0x7fff56cdf2b0
#7  0x00007f6447fb6ecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
        threadData = 0x13e1f30
        eventLoop = {<QObject> = {_vptr.QObject = 0x7f64482e4910, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f644806e140 "QObject", data = 0x7f644806e1e0, extradata = 0x7f64482dc240}}, d_ptr = {d = 0x170cec0}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f6448076e20 "Qt", data = 0x7f644807a6a0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x60b580, stringdata = 0x7f6448080640 "QEventLoop", data = 0x7f6448080660, extradata = 0x0}}}
        returnCode = <value optimized out>
#8  0x0000000000406161 in main (argc=1, argv=0x7fff56cdf6b8) at /build/buildd/unity-2d-3.8.2/spread/app/spread.cpp:101
        application = {<QCoreApplication> = {<QObject> = {_vptr.QObject = 0x7f6447e1c610, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f644806e140 "QObject", data = 0x7f644806e1e0, extradata = 0x7f64482dc240}}, d_ptr = {d = 0x13e1d60}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f6448076e20 "Qt", data = 0x7f644807a6a0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x60b580, stringdata = 0x7f64480806e0 "QCoreApplication", data = 0x7f6448080780, extradata = 0x0}}, static self = 0x7fff56cdf2b0}, static staticMetaObject = {d = {superdata = 0x7f64482e49a0, stringdata = 0x7f64479f64e0 "QApplication", data = 0x7f64479f6720, extradata = 0x0}}}
        view = {<QDeclarativeView> = {<QGraphicsView> = {<QAbstractScrollArea> = {<QFrame> = {<QWidget> = {<QObject> = {_vptr.QObject = 0x4092f0, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f644806e140 "QObject", data = 0x7f644806e1e0, extradata = 0x7f64482dc240}}, d_ptr = {d = 0x155a220}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f6448076e20 "Qt", data = 0x7f644807a6a0, extradata = 0x0}}}, <QPaintDevice> = {_vptr.QPaintDevice = 0x4094e0, painters = 0}, static staticMetaObject = {d = {superdata = 0x60b580, stringdata = 0x7f64479fa2c0 "QWidget", data = 0x7f64479fa860, extradata = 0x0}}, data = 0x155a370}, static staticMetaObject = {d = {superdata = 0x7f6447e1e440, stringdata = 0x7f6447a511c0 "QFrame", data = 0x7f6447a51280, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7f6447e44f00, stringdata = 0x7f6447a2d060 "QAbstractScrollArea", data = 0x7f6447a2d140, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7f6447e2d900, stringdata = 0x7f6447a48d20 "QGraphicsView", data = 0x7f6447a490c0, extradata = 0x7f6447e1c220}}}, static staticMetaObject = {d = {superdata = 0x7f6447e3dec0, stringdata = 0x7f6446c864a0 "QDeclarativeView", data = 0x7f6446c86580, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x60b500, stringdata = 0x4091c0 "SpreadView", data = 0x409240, extradata = 0x0}}}
        control = {<QObject> = {_vptr.QObject = 0x409830, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f644806e140 "QObject", data = 0x7f644806e1e0, extradata = 0x7f64482dc240}}, d_ptr = {d = 0x1590800}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f6448076e20 "Qt", data = 0x7f644807a6a0, extradata = 0x0}}}, <QDBusContext> = {d_ptr = 0x0}, static staticMetaObject = {d = {superdata = 0x60b580, stringdata = 0x4095e0 "SpreadControl", data = 0x409700, extradata = 0x0}}, m_isShown = false, m_launcherClient = 0x15908a0}
        current_screen = <value optimized out>