this is darktable 0.9.2+288~gad4f86d reporting a segfault:

[Thread debugging using libthread_db enabled]
[New Thread 0x7f622cfd2700 (LWP 4548)]
[New Thread 0x7f622d3d3700 (LWP 4547)]
[New Thread 0x7f622d7d4700 (LWP 4546)]
[New Thread 0x7f622de5a700 (LWP 4545)]
[New Thread 0x7f62317fa700 (LWP 4544)]
[New Thread 0x7f6231ffb700 (LWP 4543)]
[New Thread 0x7f62327fc700 (LWP 4542)]
[New Thread 0x7f6232ffd700 (LWP 4541)]
[New Thread 0x7f62337fe700 (LWP 4540)]
[New Thread 0x7f6233fff700 (LWP 4539)]
[New Thread 0x7f6238b4a700 (LWP 4538)]
[New Thread 0x7f623934b700 (LWP 4537)]
[New Thread 0x7f6239b4c700 (LWP 4536)]
[New Thread 0x7f623a34d700 (LWP 4535)]
[New Thread 0x7f623ab4e700 (LWP 4534)]
[New Thread 0x7f623b378700 (LWP 4531)]
[New Thread 0x7f623c51a700 (LWP 4528)]
0x00007f62428550ad in read () from /lib64/libc.so.6

Thread 18 (Thread 0x7f623c51a700 (LWP 4528)):
#0  0x00007f6245dfb37d in read () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242da220d in _fswatch_thread (data=0x611a00) at /local/dev/darktable.upstream/src/common/fswatch.c:83
        gitem = 0x18
        fswatch = 0x611a00
        res = 0
        event_hdr_size = 16
        event_hdr = 0x60bfe0
        name = 0x612b40 ""
        __FUNCTION__ = "_fswatch_thread"
#2  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#3  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#4  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 17 (Thread 0x7f623b378700 (LWP 4531)):
#0  0x00007f6242859503 in poll () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007f62488bb114 in ?? () from /lib64/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f62488bba35 in g_main_loop_run () from /lib64/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f6246963244 in ?? () from /lib64/libgio-2.0.so.0
No symbol table info available.
#4  0x00007f62488e2466 in ?? () from /lib64/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#6  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#7  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 16 (Thread 0x7f623ab4e700 (LWP 4534)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd9094 in dt_control_work (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:823
        s = 0x7f623ab4f010
        __FUNCTION__ = "dt_control_work"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 15 (Thread 0x7f623a34d700 (LWP 4535)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd9094 in dt_control_work (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:823
        s = 0x7f623ab4f010
        __FUNCTION__ = "dt_control_work"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 14 (Thread 0x7f6239b4c700 (LWP 4536)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd9094 in dt_control_work (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:823
        s = 0x7f623ab4f010
        __FUNCTION__ = "dt_control_work"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 13 (Thread 0x7f623934b700 (LWP 4537)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd9094 in dt_control_work (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:823
        s = 0x7f623ab4f010
        __FUNCTION__ = "dt_control_work"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 12 (Thread 0x7f6238b4a700 (LWP 4538)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd9094 in dt_control_work (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:823
        s = 0x7f623ab4f010
        __FUNCTION__ = "dt_control_work"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 11 (Thread 0x7f6233fff700 (LWP 4539)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd8fcb in dt_control_work_res (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:801
        old = 0
        s = 0x7f623ab4f010
        threadid = 0
        __FUNCTION__ = "dt_control_work_res"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 10 (Thread 0x7f62337fe700 (LWP 4540)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd8fcb in dt_control_work_res (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:801
        old = 0
        s = 0x7f623ab4f010
        threadid = 1
        __FUNCTION__ = "dt_control_work_res"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 9 (Thread 0x7f6232ffd700 (LWP 4541)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd8fcb in dt_control_work_res (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:801
        old = 0
        s = 0x7f623ab4f010
        threadid = 2
        __FUNCTION__ = "dt_control_work_res"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 8 (Thread 0x7f62327fc700 (LWP 4542)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd8fcb in dt_control_work_res (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:801
        old = 0
        s = 0x7f623ab4f010
        threadid = 3
        __FUNCTION__ = "dt_control_work_res"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 7 (Thread 0x7f6231ffb700 (LWP 4543)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd8fcb in dt_control_work_res (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:801
        old = 0
        s = 0x7f623ab4f010
        threadid = 4
        __FUNCTION__ = "dt_control_work_res"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 6 (Thread 0x7f62317fa700 (LWP 4544)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6242dd32c0 in dt_pthread_cond_wait (cond=0x7f623ab529c0, mutex=0x7f623ab51ae0) at /local/dev/darktable.upstream/src/common/dtpthread.h:170
No locals.
#2  0x00007f6242dd8fcb in dt_control_work_res (ptr=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:801
        old = 0
        s = 0x7f623ab4f010
        threadid = 5
        __FUNCTION__ = "dt_control_work_res"
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 5 (Thread 0x7f622de5a700 (LWP 4545)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6230cba589 in tbb::internal::rml::private_worker::run() () from /usr/lib64/OpenCL/vendors/intel/libtbb.so.2
No symbol table info available.
#2  0x00007f6230cba3c6 in tbb::internal::rml::private_worker::thread_routine(void*) () from /usr/lib64/OpenCL/vendors/intel/libtbb.so.2
No symbol table info available.
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 4 (Thread 0x7f622d7d4700 (LWP 4546)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6230cba589 in tbb::internal::rml::private_worker::run() () from /usr/lib64/OpenCL/vendors/intel/libtbb.so.2
No symbol table info available.
#2  0x00007f6230cba3c6 in tbb::internal::rml::private_worker::thread_routine(void*) () from /usr/lib64/OpenCL/vendors/intel/libtbb.so.2
No symbol table info available.
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 3 (Thread 0x7f622d3d3700 (LWP 4547)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6230cba589 in tbb::internal::rml::private_worker::run() () from /usr/lib64/OpenCL/vendors/intel/libtbb.so.2
No symbol table info available.
#2  0x00007f6230cba3c6 in tbb::internal::rml::private_worker::thread_routine(void*) () from /usr/lib64/OpenCL/vendors/intel/libtbb.so.2
No symbol table info available.
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 2 (Thread 0x7f622cfd2700 (LWP 4548)):
#0  0x00007f6245df838c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f6230cba589 in tbb::internal::rml::private_worker::run() () from /usr/lib64/OpenCL/vendors/intel/libtbb.so.2
No symbol table info available.
#2  0x00007f6230cba3c6 in tbb::internal::rml::private_worker::thread_routine(void*) () from /usr/lib64/OpenCL/vendors/intel/libtbb.so.2
No symbol table info available.
#3  0x00007f6245df3a3f in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#4  0x00007f624286267d in clone () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 1 (Thread 0x7f6248d34840 (LWP 4527)):
#0  0x00007f62428550ad in read () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007f62427ff138 in _IO_new_file_underflow () from /lib64/libc.so.6
No symbol table info available.
#2  0x00007f62428001ae in _IO_default_uflow_internal () from /lib64/libc.so.6
No symbol table info available.
#3  0x00007f62427f41ea in _IO_getline_info_internal () from /lib64/libc.so.6
No symbol table info available.
#4  0x00007f62427f2f21 in fgets () from /lib64/libc.so.6
No symbol table info available.
#5  0x00007f6242d8e2ea in _dt_sigsegv_handler (param=11) at /local/dev/darktable.upstream/src/common/darktable.c:111
        read_something = 0
        fd = 0x3b568c0
        buf = "arktable/20111029_badoo'))) order by filename limit ?1, ?2)\000b\177\000\000\020\362|\004\000\000\000\000\277,cHb\177\000\000\004\200\000@\377\177\000\000\060\335\t2\377\177\000\000\004\200\000@\377\177\000\000:\000\000\000:\000\000\000\003\200\000@*\000\000\000<$cHb\177\000\000\004\200\000@\000\000\000\000\020w\337Eb\177\000\000\340W\266Hb\177\000\000 QA\003\000\000\000\000\003\200\000@\000\000\000\000 QA\003", '\000' <repeats 12 times>, "\020w\337Eb\177\000\000\340W\266Hb\177\000\000 QA\003", '\000' <repeats 12 times>"\276, ?dHb\177"...
        name_used = 0x34d6cd0 "/tmp/darktable_bt_VE173V.txt"
        fout = 39
        delete_file = 0
        command = 0x34d2fa0 "gdb darktable 4527 -batch -x /usr/share/darktable/gdb_commands"
#6  <signal handler called>
No symbol table info available.
#7  0x00007f6242e15b0d in update_query () at /local/dev/darktable.upstream/src/gui/gtk.c:710
        win = 0x33110f0
#8  0x00007f6242e15d08 in image_filter_changed (widget=0x53d0040, user_data=0x0) at /local/dev/darktable.upstream/src/gui/gtk.c:740
        i = 0
#9  0x00007f6248632d3e in g_closure_invoke () from /lib64/libgobject-2.0.so.0
No symbol table info available.
#10 0x00007f6248644367 in ?? () from /lib64/libgobject-2.0.so.0
No symbol table info available.
#11 0x00007f624864dca5 in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0
No symbol table info available.
#12 0x00007f624864de73 in g_signal_emit () from /lib64/libgobject-2.0.so.0
No symbol table info available.
#13 0x00007f6247de796a in ?? () from /usr/lib64/libgtk-x11-2.0.so.0
No symbol table info available.
#14 0x00007f6247deb978 in gtk_combo_box_set_active () from /usr/lib64/libgtk-x11-2.0.so.0
No symbol table info available.
#15 0x00007f6242ddac14 in dt_control_restore_gui_settings (mode=DT_LIBRARY) at /local/dev/darktable.upstream/src/control/control.c:1175
        bit = 0 '\000'
        widget = 0x53d0040
        filter = DT_LIB_FILTER_ALL
        sort = DT_LIB_SORT_DATETIME
#16 0x00007f6242dd62ad in dt_control_load_config (c=0x7f623ab4f010) at /local/dev/darktable.upstream/src/control/control.c:175
        width = 1272
        height = 739
        x = 0
        y = 0
        widget = 0x536a000
        fullscreen = 0
#17 0x00007f6242d8f8e5 in dt_init (argc=1, argv=0x7fff320a29c8, init_gui=1) at /local/dev/darktable.upstream/src/common/darktable.c:526
        dbfilenameFromCommand = 0x0
        image_to_load = 0x0
        datadir = "/home/tony/.config/darktable\000\000\000\000p\205\323Hb\177\000\000ȴ\324Hb\177\000\000\365\355\257Bb\177\000\000\220\366yBb\177\000\000\340\324\257Bb\177\000\000\000\000\000\000\001\000\000\000\301\004\000\000\001\000\000\000X#\325Hb\177\000\000\300%\n2\377\177\000\000X\263\324Hb\177\000\000\320%\n2\377\177\000\000p\205\323Hb\177\000\000\370%\n2\377\177\000\000\000\260\324Hb\177\000\000\372\273z\236\000\000\000\000\062\005\267Hb\177\000\000\000\000\000\000\000\000\000\000p\205\323Hb\177\000\000\001\000\000\000\377\177\000\000\000\000\000\000\000\000\000\000\001\000\000\000b\177\000\000\000\260\324Hb\177\000\000`s\323Hb\177\000\000ȴ\324Hb\177\000\000\000\000\000\000\000\000\000\000X#\325Hb\177"...
        filename = "/home/tony/.config/darktable/darktablerc\000\300\324Hb\177\000\000\020 \n2\377\177\000\000\000\000\000\000\000\000\000\000\340\035`\000\000\000\000\000\324+\267Hb\177\000\000\001\000\000\000\000\000\000\000\270\331\324Hb\177\000\000@ \n2\377\177\000\000\000\000\000\000\000\000\000\000\320\035`\000\000\000\000\000\324+\267Hb\177\000\000\001\000\000\000\000\000\000\000\340\324\324Hb\177\000\000p \n2\377\177\000\000\000\000\000\000\000\000\000\000\300\035`\000\000\000\000\000\324+\267Hb\177\000\000\001\000\000\000\000\000\000\000\000\320\324Hb\177\000\000\240 \n2\377\177\000\000\000\000\000\000\000\000\000\000\260\035`\000\000\000\000\000\324+\267Hb\177\000\000\001\000\000\000\000\000\000\000\260"...
        dbfilename = "/home/tony/.config/darktable/library.db", '\000' <repeats 2008 times>
        conf_db = 0x676bf0 "/home/tony"
        cachefilename = "/home/tony/mipmaps", '\000' <repeats 2029 times>
        cachedir = '\000' <repeats 2047 times>
        conf_cache = 0x689400 "\b"
        dbname = 0x6867b0 "\020"
        load_cached = 1
        __FUNCTION__ = "dt_init"
        thumbnails = 1000
        id = 839526856
#18 0x0000000000400b29 in main (argc=1, argv=0x7fff320a29c8) at /local/dev/darktable.upstream/src/main.c:24
No locals.