**
Gtk:ERROR:gtkrbtree.c:1044:_gtk_rbtree_find_offset: assertion failed: (tree)

Program received signal SIGABRT, Aborted.
0x00007ffff2c26849 in raise () from /lib64/libc.so.6
(gdb) bt
#0  0x00007ffff2c26849 in raise () from /lib64/libc.so.6
#1  0x00007ffff2c27cd8 in abort () from /lib64/libc.so.6
#2  0x00007ffff3530935 in g_assertion_message (domain=domain@entry=0x7ffff78f6838 "Gtk", file=file@entry=0x7ffff7943b85 "gtkrbtree.c", line=line@entry=1044, 
    func=func@entry=0x7ffff7943e40 <__FUNCTION__.28607> "_gtk_rbtree_find_offset", message=message@entry=0x9ed9f0 "assertion failed: (tree)") at gtestutils.c:2291
#3  0x00007ffff35309ba in g_assertion_message_expr (domain=domain@entry=0x7ffff78f6838 "Gtk", file=file@entry=0x7ffff7943b85 "gtkrbtree.c", line=line@entry=1044, 
    func=func@entry=0x7ffff7943e40 <__FUNCTION__.28607> "_gtk_rbtree_find_offset", expr=expr@entry=0x7ffff7977bdb "tree") at gtestutils.c:2306
#4  0x00007ffff77bccf1 in _gtk_rbtree_find_offset (tree=<optimized out>, height=<optimized out>, new_tree=new_tree@entry=0x7fffffffc3d0, new_node=new_node@entry=0x7fffffffc3d8)
    at gtkrbtree.c:1044
#5  0x00007ffff7883cc9 in gtk_tree_view_drag_gesture_begin (gesture=<optimized out>, start_x=<optimized out>, start_y=<optimized out>, tree_view=0x8dec70) at gtktreeview.c:3327
#6  0x00007ffff25e0cd8 in ffi_call_unix64 () from /usr/lib64/libffi.so.4
#7  0x00007ffff25e0729 in ffi_call () from /usr/lib64/libffi.so.4
#8  0x00007ffff380c095 in g_cclosure_marshal_generic_va (closure=0xae9430, return_value=0x0, instance=0x9a9220, args_list=<optimized out>, marshal_data=0x0, n_params=2, param_types=0x857ec0)
    at gclosure.c:1541
#9  0x00007ffff380b677 in _g_closure_invoke_va (closure=0xae9430, return_value=0x0, instance=0x9a9220, args=0x7fffffffc878, n_params=2, param_types=0x857ec0) at gclosure.c:831
#10 0x00007ffff38245af in g_signal_emit_valist (instance=0x9a9220, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffffffc878) at gsignal.c:3218
#11 0x00007ffff3825232 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at gsignal.c:3365
#12 0x00007ffff380e240 in g_cclosure_marshal_VOID__BOXEDv (closure=0x82e560, return_value=<optimized out>, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, 
    n_params=<optimized out>, param_types=0x864480) at gmarshal.c:1160
#13 0x00007ffff380b677 in _g_closure_invoke_va (closure=0x82e560, return_value=0x0, instance=0x9a9220, args=0x7fffffffcb68, n_params=1, param_types=0x864480) at gclosure.c:831
#14 0x00007ffff38245af in g_signal_emit_valist (instance=0x9a9220, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffffffcb68) at gsignal.c:3218
#15 0x00007ffff3825232 in g_signal_emit (instance=instance@entry=0x9a9220, signal_id=<optimized out>, detail=detail@entry=0) at gsignal.c:3365
#16 0x00007ffff770db1a in _gtk_gesture_set_recognized (sequence=0x0, recognized=1, gesture=0x9a9220) at gtkgesture.c:273
#17 _gtk_gesture_check_recognized (gesture=gesture@entry=0x9a9220, sequence=sequence@entry=0x0) at gtkgesture.c:318
#18 0x00007ffff770ef68 in gtk_gesture_handle_event (controller=<optimized out>, event=0xc6dda0) at gtkgesture.c:598
#19 0x00007ffff7711e8a in gtk_gesture_single_handle_event (controller=0x9a9220, event=0xc6dda0) at gtkgesturesingle.c:218
#20 0x00007ffff76e16db in gtk_event_controller_handle_event (controller=0x9a9220, event=event@entry=0xc6dda0) at gtkeventcontroller.c:214
#21 0x00007ffff789477d in _gtk_widget_run_controllers (widget=widget@entry=0x8dec70, event=event@entry=0xc6dda0, phase=phase@entry=GTK_PHASE_CAPTURE) at gtkwidget.c:7430
#22 0x00007ffff7898659 in _gtk_widget_captured_event (widget=widget@entry=0x8dec70, event=event@entry=0xc6dda0) at gtkwidget.c:7462
#23 0x00007ffff775452b in propagate_event_down (topmost=0x848280, event=0xc6dda0, widget=0x8dec70) at gtkmain.c:2468
#24 propagate_event (widget=widget@entry=0x8dec70, event=event@entry=0xc6dda0, captured=captured@entry=1, topmost=topmost@entry=0x8ee9f0) at gtkmain.c:2522
#25 0x00007ffff7755d25 in _gtk_propagate_captured_event (topmost=0x8ee9f0, event=0xc6dda0, widget=0x8dec70) at gtkmain.c:2565
#26 gtk_main_do_event (event=0xc6dda0) at gtkmain.c:1747
#27 0x00007ffff72dd8d2 in gdk_event_source_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at gdkeventsource.c:364
#28 0x00007ffff350c4d4 in g_main_dispatch (context=0x730d70) at gmain.c:3064
#29 g_main_context_dispatch (context=context@entry=0x730d70) at gmain.c:3663
#30 0x00007ffff350c718 in g_main_context_iterate (context=context@entry=0x730d70, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3734
#31 0x00007ffff350c7bc in g_main_context_iteration (context=0x730d70, context@entry=0x0, may_block=may_block@entry=1) at gmain.c:3795
#32 0x00007ffff3af9bdc in g_application_run (application=0x700190, argc=argc@entry=1, argv=argv@entry=0x7fffffffd088) at gapplication.c:2219
#33 0x0000000000414588 in main (argc=1, argv=0x7fffffffd088) at main.c:1033
