.
Thread 4 (Thread 0x7f6e70ab5840 (LWP 8137)):
#0  0x00007f6e6c3df9e3 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = 0
        result = <optimized out>
#1  0x00007f6e6ca01084 in g_main_context_poll (n_fds=8, fds=0x23b0f00, timeout=-1, context=0x2119f00, priority=<optimized out>) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3576
        poll_func = 0x7f6e6ca0f130 <g_poll>
#2  g_main_context_iterate (context=context@entry=0x2119f00, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3277
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 8
        allocated_nfds = <optimized out>
        fds = 0x23b0f00
#3  0x00007f6e6ca011a4 in g_main_context_iteration (context=0x2119f00, may_block=1) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3343
        retval = <optimized out>
#4  0x00007f6e6d2ae076 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#5  0x00007f6e6e0da97e in ?? () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtGui.so.4
No symbol table info available.
#6  0x00007f6e6d27e67f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#7  0x00007f6e6d27e908 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#8  0x00007f6e6d283ac8 in QCoreApplication::exec() () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#9  0x000000000040c913 in ?? ()
No symbol table info available.
#10 0x00007f6e6c31a76d in __libc_start_main (main=0x40c620, argc=1, ubp_av=0x7fff52f0e708, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff52f0e6f8) at libc-start.c:226
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -7774008190315139769, 4246296, 140734584907520, 0, 0, 7774208412336385351, 7692698872998128967}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x4204c0, 0x7fff52f0e708}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4326592}}}
        not_first_call = <optimized out>
#11 0x000000000040cb41 in ?? ()
No symbol table info available.
#12 0x00007fff52f0e6f8 in ?? ()
No symbol table info available.
#13 0x000000000000001c in ?? ()
No symbol table info available.
#14 0x0000000000000001 in ?? ()
No symbol table info available.
#15 0x00007fff52f0e9ce in ?? ()
No symbol table info available.
#16 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (Thread 0x7f6e57fff700 (LWP 8140)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007f6e6fee3b2d in WTF::TCMalloc_PageHeap::scavengerThread (this=0x7f6e708a4280) at wtf/FastMalloc.cpp:2499
No locals.
#2  0x00007f6e6fee3c39 in WTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at wtf/FastMalloc.cpp:1622
No locals.
#3  0x00007f6e6ae96e9a in start_thread (arg=0x7f6e57fff700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f6e57fff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -7774008190315139769, 140112216852608, 140111899523520, 0, 3, 7692573960636591431, 7692703896271711559}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#4  0x00007f6e6c3eb39d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#5  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 0x7f6e5d8c7700 (LWP 8139)):
#0  0x00007f6e6c3df9e3 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = 0
        result = <optimized out>
#1  0x00007f6e6ca01084 in g_main_context_poll (n_fds=3, fds=0x7f6e500010c0, timeout=-1, context=0x7f6e5800c1f0, priority=<optimized out>) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3576
        poll_func = 0x7f6e6ca0f130 <g_poll>
#2  g_main_context_iterate (context=0x7f6e5800c1f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3277
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 3
        allocated_nfds = <optimized out>
        fds = 0x7f6e500010c0
#3  0x00007f6e6ca014e2 in g_main_loop_run (loop=0x7f6e5800c180) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3476
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007f6e68498f56 in gdbus_shared_thread_func (user_data=0x7f6e5800c1c0) at /build/buildd/glib2.0-2.33.10/./gio/gdbusprivate.c:277
        data = 0x7f6e5800c1c0
#5  0x00007f6e6ca24115 in g_thread_proxy (data=0x7f6e5800acf0) at /build/buildd/glib2.0-2.33.10/./glib/gthread.c:801
        thread = 0x7f6e5800acf0
#6  0x00007f6e6ae96e9a in start_thread (arg=0x7f6e5d8c7700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f6e5d8c7700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -7774008190315139769, 140112001006464, 140111992617408, 0, 3, 7692596376070909255, 7692703896271711559}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007f6e6c3eb39d 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 0x7f6e577fe700 (LWP 8141)):
#0  0x00007f6e6c32f405 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <optimized out>
        selftid = 8141
#1  0x00007f6e6c332b6b in __GI_abort () at abort.c:91
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x4, sa_sigaction = 0x4}, sa_mask = {__val = {5, 140112250801848, 31, 140112239727141, 1, 140112238260433, 5, 140112239731385, 3, 140111891124382, 2, 140112239727088, 1, 140112239736068, 3, 140111891124356}}, sa_flags = 12, sa_restorer = 0x7f6e6c473508}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f6e6c36cd0e in __libc_message (do_abort=2, fmt=0x7f6e6c474fd0 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:201
        ap = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7f6e577fda00, reg_save_area = 0x7f6e577fd910}}
        ap_copy = {{gp_offset = 16, fp_offset = 48, overflow_arg_area = 0x7f6e577fda00, reg_save_area = 0x7f6e577fd910}}
        fd = 2
        on_2 = <optimized out>
        list = <optimized out>
        nlist = <optimized out>
        cp = <optimized out>
        written = <optimized out>
#3  0x00007f6e6c377506 in malloc_printerr (action=3, str=0x7f6e6c471f99 "invalid fastbin entry (free)", ptr=<optimized out>) at malloc.c:5007
        buf = "000000000234c3c0"
        cp = <optimized out>
#4  0x00007f6e6d1ce298 in QString::free(QString::Data*) () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#5  0x00007f6e6eb45929 in ?? () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtDBus.so.4
No symbol table info available.
#6  0x00007f6e6eb45a3f in QDBusMessage::~QDBusMessage() () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtDBus.so.4
No symbol table info available.
#7  0x00007f6e6eb4175d in ?? () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtDBus.so.4
No symbol table info available.
#8  0x00007f6e6d2837ba in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#9  0x00007f6e6d2adec3 in ?? () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#10 0x00007f6e6ca00db5 in g_main_dispatch (context=0x7f6e4c0009a0) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:2707
        dispatch = 0x7f6e6d2adeb0
        was_in_call = 0
        user_data = 0x0
        callback = 0
        cb_funcs = 0x0
        cb_data = 0x0
        current_source_link = {data = 0x7f6e4c001d00, next = 0x0}
        need_destroy = <optimized out>
        source = 0x7f6e4c001d00
        current = 0x2335470
        i = <optimized out>
#11 g_main_context_dispatch (context=context@entry=0x7f6e4c0009a0) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3211
No locals.
#12 0x00007f6e6ca010e8 in g_main_context_iterate (context=context@entry=0x7f6e4c0009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3282
        max_priority = 2147483647
        timeout = 6337
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = <optimized out>
        fds = 0x7f6e4c0026d0
#13 0x00007f6e6ca011a4 in g_main_context_iteration (context=0x7f6e4c0009a0, may_block=1) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3343
        retval = <optimized out>
#14 0x00007f6e6d2ae056 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#15 0x00007f6e6d27e67f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#16 0x00007f6e6d27e908 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#17 0x00007f6e6d181a50 in QThread::exec() () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#18 0x00007f6e6d1849eb in ?? () from /tmp/tmpIc5BMM/usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#19 0x00007f6e6ae96e9a in start_thread (arg=0x7f6e577fe700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f6e577fe700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -7774008190315139769, 140734584902080, 140111891130816, 0, 3, 7692572862735576391, 7692703896271711559}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#20 0x00007f6e6c3eb39d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#21 0x0000000000000000 in ?? ()
No symbol table info available.