"AttributeError: Handler cb_checkbutton_storage_show_passphrase_toggled not found" on Greeter close

I see this in the Journal for a bunch of test suite failures recently:

Nov 15 11:05:22 amnesia tails-greeter.desktop[3767]: [INFO] greeter.py:124 close_app: Finished.
Nov 15 11:05:22 amnesia tails-greeter.desktop[3767]: Traceback (most recent call last):
Nov 15 11:05:22 amnesia tails-greeter.desktop[3767]:   File "/usr/lib/python3/dist-packages/gi/overrides/Gtk.py", line 110, in _builder_connect_callback
Nov 15 11:05:22 amnesia tails-greeter.desktop[3767]:     handler, args = _extract_handler_and_args(obj_or_map, handler_name)
Nov 15 11:05:22 amnesia tails-greeter.desktop[3767]:   File "/usr/lib/python3/dist-packages/gi/overrides/Gtk.py", line 90, in _extract_handler_and_args
Nov 15 11:05:22 amnesia tails-greeter.desktop[3767]:     raise AttributeError('Handler %s not found' % handler_name)
Nov 15 11:05:22 amnesia tails-greeter.desktop[3767]: AttributeError: Handler cb_checkbutton_storage_show_passphrase_toggled not found

Impact: nothing user-visible AFAICT but that’s one more innocuous error our Help Desk and FT frontdesk folks have to filter out when looking for potential causes of trouble in bug reports.

Feature Branch: bugfix/17240-greeter-attribute-error

Related issues

• Related to #17177 (closed)
• Blocks #16209

Original created by @intrigeri on 17240 (Redmine)