# Crashes * X core.4966 null dereference in gtk_text_mark_get_buffer gtk+3 caused by saving a handful of attachments * Fixed, but can regress too easily. * Repro: save a json file from a pgp or plaintext mail. click a different message. Mouse over the message view. * Notes: ```text (mail1glade2.py:14273): Gtk-CRITICAL **: gtk_text_mark_get_buffer: assertion 'GTK_IS_TEXT_MARK (mark)' failed (mail1glade2.py:14273): Gtk-CRITICAL **: gtk_text_buffer_delete_mark: assertion 'GTK_IS_TEXT_MARK (mark)' failed (mail1glade2.py:14273): Gtk-CRITICAL **: gtk_text_mark_get_buffer: assertion 'GTK_IS_TEXT_MARK (mark)' failed (mail1glade2.py:14273): Gtk-CRITICAL **: gtk_text_buffer_delete_mark: assertion 'GTK_IS_TEXT_MARK (mark)' failed ``` * Segmentation fault common. * Caused by Gtk.FileChooserDialog and clickFile (and friends) not returning True which causes the event to be passed on. This is a Gtk bug but we must avoid crashing. * [kwin crashes on pinentry](https://bugs.kde.org/show_bug.cgi?id=379493) * core.2239 caused by experimental code to remove messages from threaded message list clickSpamMulti. Delete a parent and child. * not in published BikeIM * Notes: ```text #0 0x00007fe6aa8dd038 in g_node_traverse_post_order () from /usr/lib64/libglib-2.0.so.0 => 0x7fe6aa8dd038 <g_node_traverse_post_order+40>: mov 0x8(%rdi),%rbx rdi 0x110 272 rbx 0x25efc00 39779328 ``` * Abort on startup * First seen in 6d7235d ```text [xcb] Unknown request in queue while dequeuing [xcb] Most likely this is a multi-threaded client and XInitThreads has not been called [xcb] Aborting, sorry about that. python3: /var/tmp/portage/x11-libs/libX11-1.6.5/work/libX11-1.6.5/src/xcb_io.c:165: dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq' failed. Aborted ``` * Likely fixed in 4cd890a. Probable cause is using python thread instead of idle_add.