Comment 1 for bug 1432428

> How can I get more debug info, or is the crash file of any help?
You should be able to file another bug report with your crash file:
$ ubuntu-bug /var/log/_usr_lib_unity_unity-panel-service.1000.crash
If that worked you may want to duplicate this bug to the new one.

From what I can tell the crash seems to happen in libatk-bridge-2.0, see attachment. I ran
$ sudo gdb -p $(pidof unity-panel-service) -batch -ex 'c' -ex 'bt full'
then restarted Onboard and clicked the panel once. It doesn't always happen right away, but if I keep trying it will eventually. There might be a race with accessibles appearing/disappearing at the wrong time. I'm not sure if we can influence this from Onboard's side, but I'm going to experiment a bit.