.
Thread 3 (Thread 0x7fe7bd18a700 (LWP 1770)):
#0  0x00007fe7c0bb3d93 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = 0
        result = <optimized out>
#1  0x00007fe7c1d68136 in g_main_context_poll (n_fds=3, fds=0x7fe7b80010c0, timeout=-1, context=0x1eb92f0, priority=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3412
        poll_func = 0x7fe7c1d75090 <g_pattern_match_simple+128>
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x1eb92f0, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3113
        timeout = -1
        some_ready = <optimized out>
        fds = 0x7fe7b80010c0
        max_priority = 2147483647
        nfds = 3
        allocated_nfds = <optimized out>
#3  g_main_context_iterate (context=0x1eb92f0, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3055
        some_ready = -1207955264
#4  0x00007fe7c1d6859a in g_main_loop_run (loop=0x1eb92a0) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3312
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#5  0x00007fe7c254a446 in release_required_types () at /build/buildd/glib2.0-2.31.20/./gio/gdbusprivate.c:248
No locals.
#6  gdbus_shared_thread_func (user_data=0x1eb92c0) at /build/buildd/glib2.0-2.31.20/./gio/gdbusprivate.c:279
        data = 0x1eb92c0
#7  0x00007fe7c1d897d5 in g_thread_proxy (data=0x1eb4e80) at /build/buildd/glib2.0-2.31.20/./glib/gthread.c:794
        thread = 0x1eb4e80
#8  0x00007fe7c0e91e9a in start_thread (arg=0x7fe7bd18a700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7fe7bd18a700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 3029956040274708744, 140734444002864, 140633286683072, 0, 3, -3043330786460727032, -3043570071933843192}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#9  0x00007fe7c0bbf74d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#10 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 0x7fe7b6318700 (LWP 1790)):
#0  0x00007fe7c0bb3d93 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = 0
        result = <optimized out>
#1  0x00007fe7c1d68136 in g_main_context_poll (n_fds=1, fds=0x7fe7a40010e0, timeout=-1, context=0x1ed69c0, priority=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3412
        poll_func = 0x7fe7c1d75090 <g_pattern_match_simple+128>
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x1ed69c0, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3113
        timeout = -1
        some_ready = <optimized out>
        fds = 0x7fe7a40010e0
        max_priority = 2147483647
        nfds = 1
        allocated_nfds = <optimized out>
#3  g_main_context_iterate (context=0x1ed69c0, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3055
        some_ready = -1543499552
#4  0x00007fe7c1d6859a in g_main_loop_run (loop=0x7fe7a40010c0) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3312
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#5  0x00007fe7b75fb75b in dconf_context_thread (data=0x1ed69c0) at dconfcontext.c:11
        context = 0x1ed69c0
        loop = <optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#6  0x00007fe7c1d897d5 in g_thread_proxy (data=0x1ec0f70) at /build/buildd/glib2.0-2.31.20/./glib/gthread.c:794
        thread = 0x1ec0f70
#7  0x00007fe7c0e91e9a in start_thread (arg=0x7fe7b6318700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7fe7b6318700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 3029956040274708744, 140734444001952, 140633170872768, 0, 3, -3043311202483599096, -3043570071933843192}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007fe7c0bbf74d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 0x7fe7c32d9840 (LWP 1761)):
#0  0x00007fe7c1d9ab8d in ?? () at /build/buildd/glib2.0-2.31.20/./glib/gvariant-core.c:583 from /tmp/tmpS40PBP/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#1  0x0000000000000007 in ?? ()
No symbol table info available.
#2  0x00007fe7c2a3aca6 in dee_sequence_model_free_row (self=<optimized out>, iter=0x206c0a0) at dee-sequence-model.c:981
        priv = 0x201a1d0
        row = 0x7fe7b8017f40
        n_cols = 32
        i = <optimized out>
        tag_iter = <optimized out>
        row_tag_iter = <optimized out>
        dum = <optimized out>
        destroy = <optimized out>
#3  0x00007fe7c2a3c1f2 in dee_sequence_model_remove (self=0x201a180, iter_=0x206c0a0) at dee-sequence-model.c:482
        __PRETTY_FUNCTION__ = "dee_sequence_model_remove"
#4  0x00007fe7c2c82182 in unity_results_synchronizer_on_row_removed (iter=0x1ea9c60, provider=0x1ec4440, self=0x2024540) at unity-lens-tools.c:1228
        _tmp9_ = <optimized out>
        _tmp11_ = <optimized out>
        _tmp8_ = <optimized out>
        _tmp10_ = <optimized out>
        _tmp12_ = <optimized out>
        _tmp1_ = 0x1ec4440
        _tmp4_ = 0x1ec4440
        riter = <optimized out>
        _tmp7_ = <optimized out>
        _tmp2_ = 0x1
        tag = 0x1
        _tmp5_ = 0x1ea9c60
        _tmp0_ = <optimized out>
        _tmp6_ = <optimized out>
        _tmp3_ = 0x1
#5  _unity_results_synchronizer_on_row_removed_dee_model_row_removed (_sender=<optimized out>, iter=0x1ea9c60, self=0x2024540) at unity-lens-tools.c:963
No locals.
#6  0x00007fe7c22393c4 in g_closure_add_invalidate_notifier (closure=0x202ff20, notify_data=0x0, notify_func=0) at /build/buildd/glib2.0-2.31.20/./gobject/gclosure.c:467
        __s = <optimized out>
        __p = <optimized out>
        __PRETTY_FUNCTION__ = "g_closure_add_invalidate_notifier"
#7  0x00007fe7c1d57f73 in g_hash_table_lookup_node (hash_return=<synthetic pointer>, key=0x0, hash_table=0x0) at /build/buildd/glib2.0-2.31.20/./glib/ghash.c:401
        node_hash = <optimized out>
        hash_value = <optimized out>
        have_tombstone = 0
        step = 0
        node_index = <optimized out>
        first_tombstone = 0
#8  g_hash_table_lookup (hash_table=0x0, key=0x0) at /build/buildd/glib2.0-2.31.20/./glib/ghash.c:1074
        node_hash = <optimized out>
        __PRETTY_FUNCTION__ = "g_hash_table_lookup"
#9  0x00007fe7c22495f5 in g_param_spec_enum (name=0x3 <Address 0x3 out of bounds>, nick=0x1ec4440 "p\020\001\002", blurb=0x2030460 "\237", enum_type=33623120, default_value=33752160, flags=<optimized out>) at /build/buildd/glib2.0-2.31.20/./gobject/gparamspecs.c:2031
        espec = <optimized out>
        enum_class = <optimized out>
        __PRETTY_FUNCTION__ = "g_param_spec_enum"
#10 0x00007fe7c1d66001 in g_main_context_ref_thread_default () at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:751
        context = <optimized out>
#11 0x00000000000000cb in ?? ()
No symbol table info available.
#12 0x0000000002010c50 in ?? ()
No symbol table info available.
#13 0x0000000001ec4440 in ?? ()
No symbol table info available.
#14 0x00000000c22588d7 in ?? ()
No symbol table info available.
#15 0x000000000200e310 in ?? ()
No symbol table info available.
#16 0x0000000000000018 in ?? ()
No symbol table info available.
#17 0x0000000000000000 in ?? ()
No symbol table info available.