If somebody is incautiously advised to remove /opt/click.ubuntu.com/* as part of trying to figure out a problem with the click scope, then "click list" gets very confused because the symlinks under /opt/click.ubuntu.com/.click/ are still there but are now dangling.
phablet@ubuntu-phablet:/$ click list --manifest
Traceback (most recent call last):
File "/usr/bin/click", line 84, in <module>
sys.exit(main())
File "/usr/bin/click", line 79, in main
mod.run(args)
File "/usr/lib/python3/dist-packages/click/commands/list.py", line 59, in run
for package, version, path, writeable in list_packages(options):
File "/usr/lib/python3/dist-packages/click/commands/list.py", line 40, in list_packages
package, version, registry.path(package),
File "/usr/lib/python3/dist-packages/click/user.py", line 297, in path
(package, self.user))
KeyError: 'com.ubuntu.developer.dgalg.wordchain does not exist in any database for user phablet'
This is not really a valid thing to do, especially now that click supports proper package removal, but it would be nice to fail less badly.
This appears to be no longer a issue, if I follow the steps outlined above I get:
$ click list --manifest
** (process:19378): WARNING **: user.vala:724: com.ubuntu.
[]
which sounds entirely reasonable to me. Please let me know if there is more to do or if I can close this bug.