/usr/bin/mate-panel:ERROR:/build/buildd/gtk+2.0-2.24.27/modules/other/gail/gail.c:622:gail_focus_notify_when_idle: code should not be reached

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding mate-panel. This problem was most recently seen with version 1.8.1+dfsg1-3, the problem page at https://errors.ubuntu.com/problem/558945d278bfc3a06a03bc65607f51b8c4403af6 contains more details.

[Launchpad Janitor (janitor)]

[Expired for mate-panel (Ubuntu) because there has been no activity for 60 days.]

[Brian Murray (brian-murray)]

Why was this marked as Incomplete?

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Angel Guzman Maeso (shakaran)]

This appears too in Ubuntu 16.10 (Development branch) with Eclipse 4.5.1, pressing submenus. 100% reproducible

Gtk:ERROR:/build/gtk+3.0-JTuwRW/gtk+3.0-3.18.5/./gtk/a11y/gtkaccessibility.c:564:gail_focus_notify_when_idle: code should not be reached

[Oliver (euro-cent)]

Why is this bug invalid?
I have the same problem in Ubuntu Mate 16.04 when accessing the menu of Eclipse 32 Bit version and still no solution.
The bug is 100 % reproducible as Angel Guzman Maeso said.

And it is a Gtk error message.

Eclipse version used:

MD5:
eclipse-jee-mars-2-linux-gtk.tar.gz 3859084ed0db52f06436c62f115472d7

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.