.
Thread 2 (Thread 0x7f4738b67700 (LWP 2086)):
#0  0x00007f4744338c33 in select () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f474748b171 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#2  0x00007f47473ac32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#3  0x00007f4744030182 in start_thread (arg=0x7f4738b67700) at pthread_create.c:312
        __res = <optimized out>
        pd = 0x7f4738b67700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139943870887680, 2643142235562614293, 0, 0, 139943870888384, 139943870887680, -2729143204194902507, -2728939627740094955}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#4  0x00007f474434130d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
.
Thread 1 (Thread 0x7f47479fb7c0 (LWP 2081)):
#0  0x00007f474427cf79 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = 0
        pid = 2081
        selftid = 2081
#1  0x00007f4744280388 in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x11b9050, sa_sigaction = 0x11b9050}, sa_mask = {__val = {0, 139944091745376, 139944119129431, 139942919405573, 0, 0, 139944062668072, 139944066574440, 139944091745376, 108208000, 139944119158037, 139944121055128, 133744352, 2, 139944121057488, 133744352}}, sa_flags = -1563548312, sa_restorer = 0x7fffa2ce2070}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f47448826b5 in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#3  0x00007f4744880836 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#4  0x00007f4744880863 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#5  0x00007f4744880af6 in __cxa_rethrow () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#6  0x00007f47474ad596 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#7  0x00007f47474b2b79 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#8  0x00000000004092fe in ?? ()
No symbol table info available.
#9  0x00007f4744267ec5 in __libc_start_main (main=0x408e90, argc=1, argv=0x7fffa2ce2a18, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa2ce2a08) at libc-start.c:287
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 2643142235562614293, 4232891, 140735924808208, 0, 0, -2643307009221681643, -2728939932508709355}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x4299f0 <__libc_csu_init>, 0x7fffa2ce2a18}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4364784}}}
        not_first_call = <optimized out>
#10 0x00000000004096e4 in _start ()
No symbol table info available.