Comment 9 for bug 1876609

There seem to be two errors.
Whether they are independant or related I don't know.

1) Error 1: when adding gnubiff applet to panel and no pending email

I.e. gnubiff is not in panel. There is no pending email.
gnome-panel is started in gdb
gnubiff is added to panel using 'Add to Panel'

This is

XGetWindowProperty
read_rgb_icon
_wnck_read_icons

and full backtrace is in 'Error 1 Attachment'

2) Error 2: When gnubiff applet is in the panel already and email is received.

I.e. gnubiff is already in panel. There is no pending email.
gnome-panel is started in gdb.
Mail is received

This is the poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' error

XGetWindowProperty
get_current_desktop
gdk_x11_screen_get_work_area

and backtrace is in 'Error 2 Attachment'