.
Thread 5 (process 5578):
#0  0x00002ab641d5f8c6 in poll () from /lib/libc.so.6
#1  0x00002ab63e22589d in PR_Poll ()
   from /usr/lib/mozilla-thunderbird/libnspr4.so
#2  0x00002ab643aa3292 in ?? ()
   from /usr/lib/mozilla-thunderbird/components/libnecko.so
#3  0x00002ab643aa39ce in ?? ()
   from /usr/lib/mozilla-thunderbird/components/libnecko.so
#4  0x00002ab63dba3b9c in ?? ()
   from /usr/lib/mozilla-thunderbird/libxpcom_core.so
#5  0x00002ab63e2295ad in ?? () from /usr/lib/mozilla-thunderbird/libnspr4.so
#6  0x00002ab63e4512a5 in start_thread () from /lib/libpthread.so.0
#7  0x00002ab641d6861d in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()
.
Thread 4 (process 5583):
#0  0x00002ab63e455987 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00002ab63e223348 in ?? () from /usr/lib/mozilla-thunderbird/libnspr4.so
#2  0x00002ab63e223f6a in PR_WaitCondVar ()
   from /usr/lib/mozilla-thunderbird/libnspr4.so
#3  0x00002ab63dba5a62 in ?? ()
   from /usr/lib/mozilla-thunderbird/libxpcom_core.so
#4  0x00002ab63dba3b9c in ?? ()
   from /usr/lib/mozilla-thunderbird/libxpcom_core.so
#5  0x00002ab63e2295ad in ?? () from /usr/lib/mozilla-thunderbird/libnspr4.so
#6  0x00002ab63e4512a5 in start_thread () from /lib/libpthread.so.0
#7  0x00002ab641d6861d in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()
.
Thread 3 (process 5590):
#0  0x00002ab641d5f8c6 in poll () from /lib/libc.so.6
#1  0x00002ab63e22589d in PR_Poll ()
   from /usr/lib/mozilla-thunderbird/libnspr4.so
#2  0x00002ab63e22b30f in ?? () from /usr/lib/mozilla-thunderbird/libnspr4.so
#3  0x00002ab63e2295ad in ?? () from /usr/lib/mozilla-thunderbird/libnspr4.so
#4  0x00002ab63e4512a5 in start_thread () from /lib/libpthread.so.0
#5  0x00002ab641d6861d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()
.
Thread 2 (process 7202):
#0  0x00002ab63e455987 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00002ab63e223348 in ?? () from /usr/lib/mozilla-thunderbird/libnspr4.so
#2  0x00002ab63e223f6a in PR_WaitCondVar ()
   from /usr/lib/mozilla-thunderbird/libnspr4.so
#3  0x00002ab643a81838 in ?? ()
   from /usr/lib/mozilla-thunderbird/components/libnecko.so
#4  0x00002ab63e2295ad in ?? () from /usr/lib/mozilla-thunderbird/libnspr4.so
#5  0x00002ab63e4512a5 in start_thread () from /lib/libpthread.so.0
#6  0x00002ab641d6861d in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()
.
Thread 1 (process 5576):
#0  0x00002ab63e4590a0 in raise () from /lib/libpthread.so.0
#1  0x0000000000410886 in ?? ()
#2  <signal handler called>
#3  0x00000000000000c1 in ?? ()
#4  0x00002aaaab21ed38 in ?? ()
   from /usr/lib/mozilla-thunderbird/components/libwidget_gtk2.so
#5  0x00002aaaab21fec9 in ?? ()
   from /usr/lib/mozilla-thunderbird/components/libwidget_gtk2.so
#6  0x00002aaaab21ff27 in ?? ()
   from /usr/lib/mozilla-thunderbird/components/libwidget_gtk2.so
#7  0x00002aaaab21ff39 in ?? ()
   from /usr/lib/mozilla-thunderbird/components/libwidget_gtk2.so
#8  0x00002ab641292f1b in ?? () from /usr/lib/libglib-2.0.so.0
#9  0x00002ab641292a14 in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#10 0x00002ab64129585d in ?? () from /usr/lib/libglib-2.0.so.0
#11 0x00002ab641295b6a in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#12 0x00002ab63e9ad023 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#13 0x00002aaaab22045c in ?? ()
   from /usr/lib/mozilla-thunderbird/components/libwidget_gtk2.so
#14 0x00002aaaad99bbee in ?? ()
   from /usr/lib/mozilla-thunderbird/components/libtoolkitcomps.so
#15 0x00000000004087a9 in ?? ()
#16 0x00002ab641cb68e4 in __libc_start_main () from /lib/libc.so.6
#17 0x0000000000403ca9 in ?? ()
#18 0x00007fff6d65b198 in ?? ()
#19 0x0000000000000000 in ?? ()