PID: 795 (gnome-session-f)
           UID: 1000 (hsingyun)
           GID: 100 (users)
        Signal: 11 (SEGV)
     Timestamp: Sat 2017-03-11 01:01:57 CST (45s ago)
  Command Line: /usr/lib/gnome-session/gnome-session-failed --allow-logout
    Executable: /usr/lib/gnome-session/gnome-session-failed
 Control Group: /user.slice/user-1000.slice/session-c2.scope
          Unit: session-c2.scope
         Slice: user-1000.slice
       Session: c2
     Owner UID: 1000 (hsingyun)
       Boot ID: 67ea83722852415d97032a370c026e39
    Machine ID: ef37610188da44ec82561bc06c08bc18
      Hostname: hsingyun-pc
       Storage: /var/lib/systemd/coredump/core.gnome-session-f.1000.67ea83722852415d97032a370c026e39.795.1489165317000000000000.lz4
       Message: Process 795 (gnome-session-f) of user 1000 dumped core.
                
                Stack trace of thread 795:
                #0  0x00007f2172e063b2 _gtk_style_provider_private_get_settings (libgtk-3.so.0)
                #1  0x00007f2172cb3103 gtk_css_value_initial_compute (libgtk-3.so.0)
                #2  0x00007f2172cce331 _gtk_css_value_compute (libgtk-3.so.0)
                #3  0x00007f2172cb3047 gtk_css_value_inherit_compute (libgtk-3.so.0)
                #4  0x00007f2172cce331 _gtk_css_value_compute (libgtk-3.so.0)
                #5  0x00007f2172cc67bc gtk_css_static_style_compute_value (libgtk-3.so.0)
                #6  0x00007f2172cb42eb _gtk_css_lookup_resolve (libgtk-3.so.0)
                #7  0x00007f2172cc66f6 gtk_css_static_style_new_compute (libgtk-3.so.0)
                #8  0x00007f2172cc674e gtk_css_static_style_get_default (libgtk-3.so.0)
                #9  0x00007f2172cb4b51 gtk_css_node_init (libgtk-3.so.0)
                #10 0x00007f217263230f g_type_create_instance (libgobject-2.0.so.0)
                #11 0x00007f21726141fb n/a (libgobject-2.0.so.0)
                #12 0x00007f2172615c0d g_object_newv (libgobject-2.0.so.0)
                #13 0x00007f21726163c4 g_object_new (libgobject-2.0.so.0)
                #14 0x00007f2172cce970 gtk_css_widget_node_new (libgtk-3.so.0)
                #15 0x00007f2172e97002 gtk_widget_init (libgtk-3.so.0)
                #16 0x00007f217263230f g_type_create_instance (libgobject-2.0.so.0)
                #17 0x00007f21726141fb n/a (libgobject-2.0.so.0)
                #18 0x00007f2172615c0d g_object_newv (libgobject-2.0.so.0)
                #19 0x00007f21726163c4 g_object_new (libgobject-2.0.so.0)
                #20 0x00000000004024e2 main (gnome-session-failed)
                #21 0x00007f2171f68511 __libc_start_main (libc.so.6)
                #22 0x0000000000401d2a _start (gnome-session-failed)