Plone hangs in debugtoolbar when trying to edit a portlet

[djowett]

At this line:

secu_label += '. Permission: ' + secu_infos[-1][1:-11] # _x_Permission -> x

I've no idea why. Also len(secu_infos) has the same result.
Using kill -USR1 doesn't give me a stracktrace either, so I had to track this down the hard way with pdb :-(

secu_infos is <imPermissionRole object at 0x90a6970> from AccessControl version 3.0.11

I'm using:

• Plone 4.3.8
• plone.app.contenttypes 1.1
• plone.app.multilingual 2.0.2
• plone.app.portlets 2.5.4

[djowett]

I should add that commenting out this line stops the issue (though I obviously lose some information in the debugtoolbar).