I get Darktable segmentation faults and I can reproduce them. By executing Darktable from console, I get:

$ darktable
[New LWP 20260]
[New LWP 20259]
[New LWP 20258]
[New LWP 20253]
[New LWP 20252]
[New LWP 20251]
[New LWP 20248]
[New LWP 20247]
[New LWP 20246]
[New LWP 20245]
[New LWP 20244]
[New LWP 20243]
[New LWP 20242]
[New LWP 20241]
[New LWP 20240]
[New LWP 20239]
[New LWP 20238]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

warning: the debug information found in "/usr/lib/debug/usr/lib64/libcurl.so.4.3.0.debug" does not match "/lib64/libcurl.so.4" (CRC mismatch).


warning: the debug information found in "/usr/lib/debug//usr/lib64/libcurl.so.4.3.0.debug" does not match "/lib64/libcurl.so.4" (CRC mismatch).


warning: the debug information found in "/usr/lib/debug/usr/lib64//libcurl.so.4.3.0.debug" does not match "/lib64/libcurl.so.4" (CRC mismatch).

0x000000396dcea9dd in poll () at ../sysdeps/unix/syscall-template.S:81
81      T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib64/libgobject-2.0.so.0.3800.2-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
backtrace written to /tmp/darktable_bt_5UNGGX.txt
Errore di segmentazione (core dumped)



*/tmp/darktable_bt_5UNGGX.txt* is

this is darktable 1.4.2 reporting a segfault:

#0  0x000000396dcea9dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x000000396fc495b4 in g_main_context_poll (priority=2147483647, n_fds=2, fds=0x215c590, timeout=-1, context=0x2099550) at gmain.c:4007
#2  g_main_context_iterate (context=0x2099550, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3708
#3  0x000000396fc49a3a in g_main_loop_run (loop=0x2682c00) at gmain.c:3907
#4  0x000000352e145c27 in gtk_main () from /lib64/libgtk-x11-2.0.so.0
#5  0x000000351d742aeb in dt_gui_gtk_run () from /usr/bin/../lib64/darktable/libdarktable.so
#6  0x0000000000400a98 in main ()

Thread 18 (Thread 0x7f1ee0248700 (LWP 20238)):
#0  0x000000396e80f309 in __libc_waitpid (pid=20261, stat_loc=0x0, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:40
        resultvar = 139770449849824
        oldtype = 0
#1  0x000000351d6700ab in _dt_sigsegv_handler () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#2  <signal handler called>
No locals.
#3  __memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:161
No locals.
#4  0x00007f1e7205a0ee in process () from /usr/lib64/darktable/plugins/libsharpen.so
No symbol table info available.
#5  0x000000351d6e1be2 in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#6  0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#7  0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#8  0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#9  0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#10 0x000000351d6e02a6 in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#11 0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#12 0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#13 0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#14 0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#15 0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#16 0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#17 0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#18 0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#19 0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#20 0x000000351d6dfb6f in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#21 0x000000351d6e02a6 in dt_dev_pixelpipe_process_rec () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#22 0x000000351d6e3e4c in dt_dev_pixelpipe_process () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#23 0x000000351d69e4ec in dt_imageio_export_with_flags () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#24 0x000000351d6aa4ca in _init_8.isra.9 () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#25 0x000000351d6ac804 in dt_mipmap_cache_read_get () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#26 0x000000351d6cceeb in dt_image_load_job_run () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#27 0x000000351d6c552d in dt_control_run_job () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#28 0x000000351d6c5628 in dt_control_work () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#29 0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#30 0x000000396e807f33 in start_thread (arg=0x7f1ee0248700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1ee0248700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770586236672, -7360674501151019228, 0, 0, 139770586237376, 139770586236672, 7486215970162093860, -7373663029144834268}, 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>
#31 0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 17 (Thread 0x7f1edfa47700 (LWP 20239)):
#0  0x000000396e80efbd in nanosleep () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x000000396fc70028 in g_usleep (microseconds=<optimized out>) at gtimer.c:261
        request = {tv_sec = 0, tv_nsec = 5000000}
        remaining = {tv_sec = 0, tv_nsec = 1532442}
#2  0x000000351d6642c8 in dt_cache_read_get () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#3  0x000000351d6ac5ab in dt_mipmap_cache_read_get () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#4  0x000000351d6cceeb in dt_image_load_job_run () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#5  0x000000351d6c552d in dt_control_run_job () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#6  0x000000351d6c5628 in dt_control_work () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#7  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#8  0x000000396e807f33 in start_thread (arg=0x7f1edfa47700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1edfa47700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770577843968, -7360674501151019228, 0, 0, 139770577844672, 139770577843968, 7486142303419903780, -7373663029144834268}, 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>
#9  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 16 (Thread 0x7f1edf246700 (LWP 20240)):
#0  0x000000396dcbc98d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x000000396dcbc824 in __sleep (seconds=0) at ../sysdeps/unix/sysv/linux/sleep.c:137
        ts = {tv_sec = 0, tv_nsec = 296882582}
        set = {__val = {65536, 0 <repeats 15 times>}}
        oset = {__val = {0 <repeats 16 times>}}
        result = <optimized out>
#2  0x000000351d6c489a in _control_worker_kicker () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#3  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#4  0x000000396e807f33 in start_thread (arg=0x7f1edf246700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1edf246700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770569451264, -7360674501151019228, 0, 0, 139770569451968, 139770569451264, 7486143401320918820, -7373663029144834268}, 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>
#5  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 15 (Thread 0x7f1edea45700 (LWP 20241)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x000000351d6c57f0 in dt_control_work_res () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#2  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#3  0x000000396e807f33 in start_thread (arg=0x7f1edea45700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1edea45700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770561058560, -7360674501151019228, 0, 0, 139770561059264, 139770561058560, 7486140103322906404, -7373663029144834268}, 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>
#4  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 14 (Thread 0x7f1ede244700 (LWP 20242)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x000000351d6c57f0 in dt_control_work_res () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#2  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#3  0x000000396e807f33 in start_thread (arg=0x7f1ede244700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1ede244700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770552665856, -7360674501151019228, 0, 0, 139770552666560, 139770552665856, 7486141201223921444, -7373663029144834268}, 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>
#4  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 13 (Thread 0x7f1edda43700 (LWP 20243)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x000000351d6c57f0 in dt_control_work_res () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#2  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#3  0x000000396e807f33 in start_thread (arg=0x7f1edda43700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1edda43700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770544273152, -7360674501151019228, 0, 0, 139770544273856, 139770544273152, 7486137903225909028, -7373663029144834268}, 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>
#4  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 12 (Thread 0x7f1edd242700 (LWP 20244)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x000000351d6c57f0 in dt_control_work_res () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#2  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#3  0x000000396e807f33 in start_thread (arg=0x7f1edd242700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1edd242700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770535880448, -7360674501151019228, 0, 0, 139770535881152, 139770535880448, 7486139001126924068, -7373663029144834268}, 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>
#4  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 11 (Thread 0x7f1edca41700 (LWP 20245)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x000000351d6c57f0 in dt_control_work_res () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#2  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#3  0x000000396e807f33 in start_thread (arg=0x7f1edca41700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1edca41700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770527487744, -7360674501151019228, 0, 0, 139770527488448, 139770527487744, 7486135703128911652, -7373663029144834268}, 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>
#4  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 10 (Thread 0x7f1ec3fff700 (LWP 20246)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x000000351d6c57f0 in dt_control_work_res () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#2  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#3  0x000000396e807f33 in start_thread (arg=0x7f1ec3fff700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1ec3fff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770114078464, -7360674501151019228, 0, 0, 139770114079168, 139770114078464, 7486150768800444196, -7373663029144834268}, 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>
#4  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 9 (Thread 0x7f1ec37fe700 (LWP 20247)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x000000351d6c57f0 in dt_control_work_res () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#2  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#3  0x000000396e807f33 in start_thread (arg=0x7f1ec37fe700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1ec37fe700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770105685760, -7360674501151019228, 0, 0, 139770105686464, 139770105685760, 7486151866701459236, -7373663029144834268}, 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>
#4  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 8 (Thread 0x7f1ec2ffd700 (LWP 20248)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x000000351d6c57f0 in dt_control_work_res () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#2  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#3  0x000000396e807f33 in start_thread (arg=0x7f1ec2ffd700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1ec2ffd700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139770097293056, -7360674501151019228, 0, 0, 139770097293760, 139770097293056, 7486148568703446820, -7373663029144834268}, 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>
#4  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 7 (Thread 0x7f1ea74b0700 (LWP 20251)):
#0  0x000000396dcea9dd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x000000396fc495b4 in g_main_context_poll (priority=2147483647, n_fds=5, fds=0x7f1ea00081c0, timeout=-1, context=0x21063b0) at gmain.c:4007
        poll_func = 0x396fc58500 <g_poll>
#2  g_main_context_iterate (context=0x21063b0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3708
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 5
        allocated_nfds = 5
        fds = 0x7f1ea00081c0
#3  0x000000396fc49a3a in g_main_loop_run (loop=0x2106340) at gmain.c:3907
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x0000003729ad0376 in gdbus_shared_thread_func (user_data=0x2106380) at gdbusprivate.c:278
        data = 0x2106380
#5  0x000000396fc6ea45 in g_thread_proxy (data=0x20c18a0) at gthread.c:798
        thread = 0x20c18a0
#6  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#7  0x000000396e807f33 in start_thread (arg=0x7f1ea74b0700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1ea74b0700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139769632458496, -7360674501151019228, 0, 0, 139769632459200, 139769632458496, 7486371400733568804, -7373663029144834268}, 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>
#8  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 6 (Thread 0x7f1ea6caf700 (LWP 20252)):
#0  0x000000396dcea9dd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x000000396fc495b4 in g_main_context_poll (priority=2147483647, n_fds=2, fds=0x7f1e980008f0, timeout=-1, context=0x210d750) at gmain.c:4007
        poll_func = 0x396fc58500 <g_poll>
#2  g_main_context_iterate (context=context@entry=0x210d750, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3708
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 2
        allocated_nfds = 2
        fds = 0x7f1e980008f0
#3  0x000000396fc496dc in g_main_context_iteration (context=0x210d750, may_block=may_block@entry=1) at gmain.c:3774
        retval = <optimized out>
#4  0x000000396fc49729 in glib_worker_main (data=<optimized out>) at gmain.c:5473
No locals.
#5  0x000000396fc6ea45 in g_thread_proxy (data=0x20c1ad0) at gthread.c:798
        thread = 0x20c1ad0
#6  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#7  0x000000396e807f33 in start_thread (arg=0x7f1ea6caf700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1ea6caf700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139769624065792, -7360674501151019228, 0, 0, 139769624066496, 139769624065792, 7486368102735556388, -7373663029144834268}, 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>
#8  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 5 (Thread 0x7f1ea64ae700 (LWP 20253)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
No locals.
#1  0x000000396fc8a915 in g_cond_wait_until (cond=cond@entry=0x2211ef8, mutex=mutex@entry=0x2211ef0, end_time=end_time@entry=112643394697) at gthread-posix.c:870
        ts = {tv_sec = 112643, tv_nsec = 394697000}
        status = <optimized out>
#2  0x000000396fc1f0d1 in g_async_queue_pop_intern_unlocked (queue=queue@entry=0x2211ef0, wait=wait@entry=1, end_time=end_time@entry=112643394697) at gasyncqueue.c:424
        retval = <optimized out>
        __FUNCTION__ = "g_async_queue_pop_intern_unlocked"
#3  0x000000396fc1f68b in g_async_queue_timeout_pop (queue=0x2211ef0, timeout=timeout@entry=15000000) at gasyncqueue.c:545
        end_time = 112643394697
        retval = <optimized out>
#4  0x000000396fc6f4d6 in g_thread_pool_wait_for_new_pool () at gthreadpool.c:169
        pool = <optimized out>
        local_max_idle_time = 15000
        local_wakeup_thread_serial = <optimized out>
        local_max_unused_threads = 2
        last_wakeup_thread_serial = 0
        have_relayed_thread_marker = <optimized out>
#5  g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:366
        free_pool = <optimized out>
        task = 0x2
        pool = <optimized out>
#6  0x000000396fc6ea45 in g_thread_proxy (data=0x20c1d40) at gthread.c:798
        thread = 0x20c1d40
#7  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#8  0x000000396e807f33 in start_thread (arg=0x7f1ea64ae700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1ea64ae700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139769615673088, -7360674501151019228, 0, 0, 139769615673792, 139769615673088, 7486369200636571428, -7373663029144834268}, 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>
#9  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 4 (Thread 0x7f1e5ffff700 (LWP 20258)):
#0  futex_wait (val=64, addr=0x7f1ed80017d4) at ../../../libgomp/config/linux/x86/futex.h:44
        r10 = 0
        res = -512
#1  do_wait (val=64, addr=0x7f1ed80017d4) at ../../../libgomp/config/linux/wait.h:64
        val = 64
        addr = 0x7f1ed80017d4
#2  gomp_barrier_wait_end (bar=0x7f1ed80017d0, state=64) at ../../../libgomp/config/linux/bar.c:47
No locals.
#3  0x000000399ba0882e in gomp_thread_start (xdata=<optimized out>) at ../../../libgomp/team.c:119
        team = 0x7f1ed82fd690
        data = <optimized out>
        pool = 0x7f1ed8001790
        local_fn = 0x7f1e72058120 <process._omp_fn>
        local_data = 0x7f1ee0233040
#4  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#5  0x000000396e807f33 in start_thread (arg=0x7f1e5ffff700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1e5ffff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139768436356864, -7360674501151019228, 0, 0, 139768436357568, 139768436356864, 7486423447684132644, -7373663029144834268}, 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>
#6  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 3 (Thread 0x7f1e690b5700 (LWP 20259)):
#0  futex_wait (val=64, addr=0x7f1ed80017d4) at ../../../libgomp/config/linux/x86/futex.h:44
        r10 = 0
        res = -512
#1  do_wait (val=64, addr=0x7f1ed80017d4) at ../../../libgomp/config/linux/wait.h:64
        val = 64
        addr = 0x7f1ed80017d4
#2  gomp_barrier_wait_end (bar=0x7f1ed80017d0, state=64) at ../../../libgomp/config/linux/bar.c:47
No locals.
#3  0x000000399ba0882e in gomp_thread_start (xdata=<optimized out>) at ../../../libgomp/team.c:119
        team = 0x7f1ed82fd690
        data = <optimized out>
        pool = 0x7f1ed8001790
        local_fn = 0x7f1e72058120 <process._omp_fn>
        local_data = 0x7f1ee0233040
#4  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#5  0x000000396e807f33 in start_thread (arg=0x7f1e690b5700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1e690b5700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139768588097280, -7360674501151019228, 0, 0, 139768588097984, 139768588097280, 7486517072602476324, -7373663029144834268}, 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>
#6  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 2 (Thread 0x7f1e698b6700 (LWP 20260)):
#0  futex_wait (val=64, addr=0x7f1ed80017d4) at ../../../libgomp/config/linux/x86/futex.h:44
        r10 = 0
        res = -512
#1  do_wait (val=64, addr=0x7f1ed80017d4) at ../../../libgomp/config/linux/wait.h:64
        val = 64
        addr = 0x7f1ed80017d4
#2  gomp_barrier_wait_end (bar=0x7f1ed80017d0, state=64) at ../../../libgomp/config/linux/bar.c:47
No locals.
#3  0x000000399ba0882e in gomp_thread_start (xdata=<optimized out>) at ../../../libgomp/team.c:119
        team = 0x7f1ed82fd690
        data = <optimized out>
        pool = 0x7f1ed8001790
        local_fn = 0x7f1e72058120 <process._omp_fn>
        local_data = 0x7f1ee0233040
#4  0x0000003504eaa8f4 in ?? () from /usr/lib64/nvidia-304xx/libGL.so.1
No symbol table info available.
#5  0x000000396e807f33 in start_thread (arg=0x7f1e698b6700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1e698b6700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139768596489984, -7360674501151019228, 0, 0, 139768596490688, 139768596489984, 7486515972553977636, -7373663029144834268}, 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>
#6  0x000000396dcf4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Thread 1 (Thread 0x7f1ee7363b00 (LWP 20234)):
#0  0x000000396dcea9dd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x000000396fc495b4 in g_main_context_poll (priority=2147483647, n_fds=2, fds=0x215c590, timeout=-1, context=0x2099550) at gmain.c:4007
        poll_func = 0x396fc58500 <g_poll>
#2  g_main_context_iterate (context=0x2099550, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3708
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 2
        allocated_nfds = 2
        fds = 0x215c590
#3  0x000000396fc49a3a in g_main_loop_run (loop=0x2682c00) at gmain.c:3907
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x000000352e145c27 in gtk_main () from /lib64/libgtk-x11-2.0.so.0
No symbol table info available.
#5  0x000000351d742aeb in dt_gui_gtk_run () from /usr/bin/../lib64/darktable/libdarktable.so
No symbol table info available.
#6  0x0000000000400a98 in main ()
No symbol table info available.



Upstream bugreport: http://www.darktable.org/redmine/issues/9977