.
Thread 2 (Thread 8551):
#0  0x00007f0d91d40e33 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  0x00007f0d9159f104 in g_main_context_poll (context=0x11e7a90, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3404
        poll_func = 0x7f0d915af130 <g_poll>
#2  g_main_context_iterate (context=0x11e7a90, 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 = 0x11e9b50
#3  0x00007f0d9159f9f2 in g_main_loop_run (loop=0x11e7a70) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007f0d8e5cdd44 in gdbus_shared_thread_func (data=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./gio/gdbusprivate.c:276
No locals.
#5  0x00007f0d915c63e4 in g_thread_create_proxy (data=0x11e7b70) at /build/buildd/glib2.0-2.28.5/./glib/gthread.c:1897
        thread = 0x11e7b70
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007f0d934a7d8c in start_thread (arg=0x7f0d8dc6e700) at pthread_create.c:304
        pd = 0x7f0d8dc6e700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139696189925120, -7862007253398599297, 140737319887264, 139696189925824, 0, 3, 7854156269047892351, 7854186053606164863}, 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  0x00007f0d91d4df7d 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 8549):
#0  0x00007f0d91c9bd05 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <value optimized out>
        selftid = 8549
#1  0x00007f0d91c9fab6 in abort () at abort.c:92
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x200000017, sa_sigaction = 0x200000017}, sa_mask = {__val = {140737319886768, 140737319897759, 8, 139696258455658, 1, 4251282, 93, 139696258464604, 3, 140737319886749, 3, 139696258455605, 1, 139696258464612, 3, 140737319886762}}, sa_flags = 6, sa_restorer = 0x7f0d91dcbb68}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f0d91cd4d7b in __libc_message (do_abort=2, fmt=0x7f0d91dcd3e0 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
        ap = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7ffff5f56920, reg_save_area = 0x7ffff5f56830}}
        ap_copy = {{gp_offset = 16, fp_offset = 48, overflow_arg_area = 0x7ffff5f56920, reg_save_area = 0x7ffff5f56830}}
        fd = 2
        on_2 = <value optimized out>
        list = <value optimized out>
        nlist = <value optimized out>
        cp = <value optimized out>
        written = <value optimized out>
#3  0x00007f0d91ce008a in malloc_printerr (av=0x7f0d920081c0) at malloc.c:6283
        buf = "00000000011f2370"
        cp = <value optimized out>
#4  malloc_consolidate (av=0x7f0d920081c0) at malloc.c:5169
        fb = <value optimized out>
        maxfb = <value optimized out>
        p = 0x11f2350
        nextp = 0x16e4330
        unsorted_bin = 0x7f0d92008218
        first_unsorted = <value optimized out>
        nextchunk = 0x11f2370
        size = 32
        nextsize = <value optimized out>
        prevsize = <value optimized out>
        nextinuse = <value optimized out>
        bck = <value optimized out>
        fwd = <value optimized out>
        __func__ = "malloc_consolidate"
#5  0x00007f0d91ce1472 in _int_malloc (av=0x7f0d920081c0, bytes=1048) at malloc.c:4373
        nb = 1056
        idx = <value optimized out>
        bin = <value optimized out>
        victim = <value optimized out>
        size = <value optimized out>
        victim_index = <value optimized out>
        remainder = <value optimized out>
        remainder_size = <value optimized out>
        block = <value optimized out>
        bit = <value optimized out>
        map = <value optimized out>
        fwd = <value optimized out>
        bck = <value optimized out>
        errstr = 0x0
        __func__ = "_int_malloc"
#6  0x00007f0d91ce431e in __libc_malloc (bytes=1048) at malloc.c:3660
        ar_ptr = 0x7f0d920081c0
        victim = <value optimized out>
        hook = <value optimized out>
        __func__ = "__libc_malloc"
#7  0x00007f0d92561e0d in operator new(unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#8  0x00007f0d92561f29 in operator new[](unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#9  0x00007f0d946ff30f in QHashData::rehash (this=0x12535b0, hint=<value optimized out>) at tools/qhash.cpp:364
        e = 0x12535b0
        oldBuckets = 0x180def0
        oldNumBuckets = 521
        nb = 131
#10 0x00007f0d94d0fdd3 in hasShrunk (this=0x11f3740, akey=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:174
No locals.
#11 QHash<QWidget*, QHashDummyValue>::remove (this=0x11f3740, akey=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:799
        deleteNext = false
        oldSize = 66
        node = 0x180e2d0
#12 0x00007f0d94d04f24 in remove (this=0x1819190, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qset.h:84
No locals.
#13 QWidget::~QWidget (this=0x1819190, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1643
        d = 0x1819ce0
#14 0x00007f0d950bce59 in QLabel::~QLabel (this=0x1819190, __in_chrg=<value optimized out>) at widgets/qlabel.cpp:263
No locals.
#15 0x00007f0d947dcc14 in QObjectPrivate::deleteChildren (this=0x1818d60) at kernel/qobject.cpp:1964
        i = <value optimized out>
        reallyWasDeleted = false
#16 0x00007f0d94d04ee2 in QWidget::~QWidget (this=0x1818a50, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1631
        d = 0x1818d60
#17 0x00007f0d950b9b99 in QGroupBox::~QGroupBox (this=0x1818a50, __in_chrg=<value optimized out>) at widgets/qgroupbox.cpp:216
No locals.
#18 0x00007f0d947dcc14 in QObjectPrivate::deleteChildren (this=0x181b1d0) at kernel/qobject.cpp:1964
        i = <value optimized out>
        reallyWasDeleted = false
#19 0x00007f0d94d04ee2 in QWidget::~QWidget (this=0x181b1a0, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1631
        d = 0x181b1d0
#20 0x00007f0d950b93a9 in QFrame::~QFrame (this=0x181b1a0, __in_chrg=<value optimized out>) at widgets/qframe.cpp:242
No locals.
#21 0x00007f0d947dcc14 in QObjectPrivate::deleteChildren (this=0x1817790) at kernel/qobject.cpp:1964
        i = <value optimized out>
        reallyWasDeleted = false
#22 0x00007f0d94d04ee2 in QWidget::~QWidget (this=0x18081f0, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1631
        d = 0x1817790
#23 0x00000000004b0a0c in C3DMipMapPage::~C3DMipMapPage() ()
No symbol table info available.
#24 0x00000000004a8c9c in C3DORCARule::UnInitialize() ()
No symbol table info available.
#25 0x0000000000419f5a in CLDC::UnInitialize() ()
No symbol table info available.
#26 0x0000000000419608 in main ()
No symbol table info available.