.
Thread 9 (Thread 0x7fcbeffff700 (LWP 427)):
#0  0x00007fcc20e6a94d in syscall () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fcc21f0ae66 in g_cond_wait_until () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#2  0x00007fcc21e8f3e1 in g_async_queue_pop_intern_unlocked () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#3  0x00007fcc21ee89ba in g_thread_pool_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#4  0x00007fcc21ee8121 in g_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#5  0x00007fcc20f49669 in start_thread () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007fcc20e71323 in clone () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
.
Thread 8 (Thread 0x7fcc17fff700 (LWP 29068)):
#0  0x00007fcc20e64c2f in poll () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fcc21ebea4e in g_main_context_iterate.isra () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#2  0x00007fcc21ebedd3 in g_main_loop_run () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#3  0x00007fcc213ba4fa in gdbus_shared_thread_func (user_data=0x562581cbb930) at ../../../gio/gdbusprivate.c:279
        data = 0x562581cbb930
#4  0x00007fcc21ee8121 in g_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#5  0x00007fcc20f49669 in start_thread () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007fcc20e71323 in clone () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
.
Thread 7 (Thread 0x7fcbfe6e7700 (LWP 29097)):
#0  0x00007fcc20e64c2f in poll () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fcc1408d1c6 in poll_func () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libpulse.so.0.21.1
No symbol table info available.
#2  0x00007fcc1407e831 in pa_mainloop_poll () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libpulse.so.0.21.1
No symbol table info available.
#3  0x00007fcc1407eeb3 in pa_mainloop_iterate () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libpulse.so.0.21.1
No symbol table info available.
#4  0x00007fcc1407ef60 in pa_mainloop_run () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libpulse.so.0.21.1
No symbol table info available.
#5  0x00007fcc1408d10d in thread () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libpulse.so.0.21.1
No symbol table info available.
#6  0x00007fcbfeaa737c in internal_thread_func () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-13.0.so
No symbol table info available.
#7  0x00007fcc20f49669 in start_thread () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#8  0x00007fcc20e71323 in clone () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
.
Thread 6 (Thread 0x7fcc14d3a700 (LWP 426)):
#0  0x00007fcc20e6a94d in syscall () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fcc21f0ae66 in g_cond_wait_until () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#2  0x00007fcc21e8f3e1 in g_async_queue_pop_intern_unlocked () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#3  0x00007fcc21ee89ba in g_thread_pool_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#4  0x00007fcc21ee8121 in g_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#5  0x00007fcc20f49669 in start_thread () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007fcc20e71323 in clone () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
.
Thread 5 (Thread 0x7fcc16ffd700 (LWP 29071)):
#0  0x00007fcc20e64c2f in poll () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fcc21ebea4e in g_main_context_iterate.isra () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#2  0x00007fcc21ebeb83 in g_main_context_iteration () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#3  0x00007fcc1c6d081d in dconf_gdbus_worker_thread (user_data=0x562581de5ea0) at ../gdbus/dconf-gdbus-thread.c:82
        context = 0x562581de5ea0
#4  0x00007fcc21ee8121 in g_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#5  0x00007fcc20f49669 in start_thread () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007fcc20e71323 in clone () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
.
Thread 4 (Thread 0x7fcc167fc700 (LWP 423)):
#0  0x00007fcc20e6a94d in syscall () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fcc21f0ae66 in g_cond_wait_until () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#2  0x00007fcc21e8f3e1 in g_async_queue_pop_intern_unlocked () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#3  0x00007fcc21ee89ba in g_thread_pool_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#4  0x00007fcc21ee8121 in g_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#5  0x00007fcc20f49669 in start_thread () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007fcc20e71323 in clone () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
.
Thread 3 (Thread 0x7fcc1cf5b700 (LWP 29067)):
#0  0x00007fcc20e64c2f in poll () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fcc21ebea4e in g_main_context_iterate.isra () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#2  0x00007fcc21ebeb83 in g_main_context_iteration () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#3  0x00007fcc21ebebd1 in glib_worker_main () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#4  0x00007fcc21ee8121 in g_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#5  0x00007fcc20f49669 in start_thread () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007fcc20e71323 in clone () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
.
Thread 2 (Thread 0x7fcc177fe700 (LWP 29070)):
#0  0x00007fcc20e6a94d in syscall () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fcc21f0ad43 in g_cond_wait () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#2  0x00007fcc21e8f3fb in g_async_queue_pop_intern_unlocked () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#3  0x00007fcc21ee8837 in g_thread_pool_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#4  0x00007fcc21ee8121 in g_thread_proxy () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#5  0x00007fcc20f49669 in start_thread () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007fcc20e71323 in clone () from /tmp/apport_sandbox_0lh3kzt0/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
.
Thread 1 (Thread 0x7fcc1cfd8600 (LWP 29066)):
#0  0x000056257fbf8bfc in nautilus_list_view_dnd_drag_begin (list_view=0x562582e72350, offset_x=<optimized out>, offset_y=<optimized out>, event=0x7fcc10032f10) at ../src/nautilus-list-view-dnd.c:296
        actions = 46
#1  0x00007fcc21b453fe in _gtk_marshal_VOID__DOUBLE_DOUBLEv (closure=<optimized out>, return_value=<optimized out>, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x5625828784c0) at gtkmarshalers.c:2982
        cc = <optimized out>
        data1 = <optimized out>
        data2 = <optimized out>
        callback = <optimized out>
        arg0 = 140
        arg1 = 606
        args_copy = {{gp_offset = 24, fp_offset = 80, overflow_arg_area = 0x7fffc6803ac0, reg_save_area = 0x7fffc6803a00}}
#2  0x00007fcc21256936 in _g_closure_invoke_va () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6200.0
No symbol table info available.
#3  0x00007fcc2127336c in g_signal_emit_valist () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6200.0
No symbol table info available.
#4  0x00007fcc212739b3 in g_signal_emit () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6200.0
No symbol table info available.
#5  0x00007fcc21259b36 in g_cclosure_marshal_VOID__BOXEDv () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6200.0
No symbol table info available.
#6  0x00007fcc21256936 in _g_closure_invoke_va () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6200.0
No symbol table info available.
#7  0x00007fcc2127336c in g_signal_emit_valist () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6200.0
No symbol table info available.
#8  0x00007fcc212739b3 in g_signal_emit () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6200.0
No symbol table info available.
#9  0x00007fcc2195de5d in gtk_gesture_handle_event (event=0x5625831205d0, controller=0x562582e5f640) at ../../../../gtk/gtkgesture.c:802
        gesture = <optimized out>
        was_recognized = 1
        sequence = 0x0
        priv = 0x562582e5f5f0
        source_device = <optimized out>
        gesture = <optimized out>
        sequence = <optimized out>
        priv = <optimized out>
        source_device = <optimized out>
        was_recognized = <optimized out>
        triggered_recognition = <optimized out>
        data = <optimized out>
#10 gtk_gesture_handle_event (controller=0x562582e5f640, event=0x5625831205d0) at ../../../../gtk/gtkgesture.c:713
        gesture = 0x562582e5f640
        sequence = <optimized out>
        priv = <optimized out>
        source_device = <optimized out>
        was_recognized = <optimized out>
        triggered_recognition = <optimized out>
        data = <optimized out>
#11 0x00007fcc21960ee6 in gtk_gesture_single_handle_event (controller=0x562582e5f640, event=0x5625831205d0) at ../../../../gtk/gtkgesturesingle.c:222
        sequence = <optimized out>
        priv = 0x562582e5f5d0
        source_device = <optimized out>
        source = GDK_SOURCE_MOUSE
        button = <optimized out>
        i = <optimized out>
        retval = <optimized out>
        test_touchscreen = <optimized out>
#12 0x00007fcc219289e0 in gtk_event_controller_handle_event (controller=0x562582e5f640, event=event@entry=0x5625831205d0) at ../../../../gtk/gtkeventcontroller.c:230
        controller_class = 0x562582855600
        retval = 0
        __func__ = "gtk_event_controller_handle_event"
#13 0x00007fcc21ae9dad in _gtk_widget_run_controllers (widget=widget@entry=0x562582d327c0, event=event@entry=0x5625831205d0, phase=phase@entry=GTK_PHASE_CAPTURE) at ../../../../gtk/gtkwidget.c:7424
        controller_phase = <optimized out>
        next = 0x5625828ef0e0
        data = 0x562582eb7c50
        handled = 1
        priv = 0x562582d326d0
        l = <optimized out>
#14 0x00007fcc21aee3a0 in _gtk_widget_captured_event (widget=widget@entry=0x562582d327c0, event=event@entry=0x5625831205d0) at ../../../../gtk/gtkwidget.c:7478
        return_val = 0
        handler = <optimized out>
        __func__ = "_gtk_widget_captured_event"
#15 0x00007fcc219a7483 in propagate_event_down (topmost=0x0, event=0x5625831205d0, widget=0x562582d327c0) at ../../../../gtk/gtkmain.c:2646
        handled_event = 0
        widgets = 0x7fcc00163d80
        l = 0x562582de5ae0
        handled_event = <optimized out>
        widgets = <optimized out>
        l = <optimized out>
#16 propagate_event (widget=widget@entry=0x562582d327c0, event=event@entry=0x5625831205d0, captured=captured@entry=1, topmost=topmost@entry=0x0) at ../../../../gtk/gtkmain.c:2694
        handled_event = 0
        propagate_func = <optimized out>
#17 0x00007fcc219a9565 in _gtk_propagate_captured_event (topmost=0x0, event=0x5625831205d0, widget=0x562582d327c0) at ../../../../gtk/gtkmain.c:2737
No locals.
#18 gtk_main_do_event (event=0x5625831205d0) at ../../../../gtk/gtkmain.c:1914
        grab_widget = 0x562582d327c0
        window_group = 0x562582b85710
        rewritten_event = <optimized out>
        device = <optimized out>
        tmp_list = <optimized out>
        event_widget = 0x562582d327c0
        topmost_widget = <optimized out>
        event_widget = <optimized out>
        grab_widget = <optimized out>
        topmost_widget = <optimized out>
        window_group = <optimized out>
        rewritten_event = <optimized out>
        device = <optimized out>
        tmp_list = <optimized out>
        __func__ = "gtk_main_do_event"
        __inst = <optimized out>
        __t = <optimized out>
        __r = <optimized out>
        window = <optimized out>
        __inst = <optimized out>
        __t = <optimized out>
        __r = <optimized out>
        __inst = <optimized out>
        __t = <optimized out>
        __r = <optimized out>
        mnemonics_visible = <optimized out>
        window = <optimized out>
        __inst = <optimized out>
        __t = <optimized out>
        __r = <optimized out>
#19 gtk_main_do_event (event=<optimized out>) at ../../../../gtk/gtkmain.c:1685
        event_widget = <optimized out>
        window_group = <optimized out>
        device = <optimized out>
        tmp_list = <optimized out>
        __func__ = "gtk_main_do_event"
        __inst = <optimized out>
        __t = <optimized out>
        __r = <optimized out>
        window = <optimized out>
        __inst = <optimized out>
        __t = <optimized out>
        __r = <optimized out>
        __inst = <optimized out>
        __t = <optimized out>
        __r = <optimized out>
        mnemonics_visible = <optimized out>
        window = <optimized out>
        __inst = <optimized out>
        __t = <optimized out>
        __r = <optimized out>
#20 0x00007fcc21693f19 in _gdk_event_emit () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libgdk-3.so.0.2404.7
No symbol table info available.
#21 0x00007fcc216c6ff6 in gdk_event_source_dispatch () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libgdk-3.so.0.2404.7
No symbol table info available.
#22 0x00007fcc21ebe85d in g_main_context_dispatch () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#23 0x00007fcc21ebeae0 in g_main_context_iterate.isra () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#24 0x00007fcc21ebeb83 in g_main_context_iteration () from /tmp/apport_sandbox_0lh3kzt0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6200.0
No symbol table info available.
#25 0x00007fcc2137ea65 in g_application_run (application=0x562581ca8210, argc=<optimized out>, argv=<optimized out>) at ../../../gio/gapplication.c:2559
        arguments = 0x562581ca6ef0
        status = 0
        context = 0x562581cbd3d0
        acquired_context = 1
        __FUNCTION__ = "g_application_run"
#26 0x000056257fbdad0b in main (argc=2, argv=0x7fffc68042a8) at ../src/nautilus-main.c:81
        retval = <optimized out>
        application = 0x562581ca8210