ubuntu-bug crashes with AttributeError: 'int' object has no attribute 'isspace'

[Jonathan Lange]

I was just trying to file a bug on apport, and got this error message (after about 20 seconds of waiting for it to generate the report and then clicking "Send").

$ ubuntu-bug apport
Traceback (most recent call last):
  File "/usr/share/apport/apport-gtk", line 588, in <module>
    app.run_argv()
  File "/usr/lib/python3/dist-packages/apport/ui.py", line 632, in run_argv
    return self.run_report_bug()
  File "/usr/lib/python3/dist-packages/apport/ui.py", line 472, in run_report_bug
    self.file_report()
  File "/usr/lib/python3/dist-packages/apport/ui.py", line 1156, in file_report
    upthread.exc_raise()
  File "/usr/lib/python3/dist-packages/apport/REThread.py", line 64, in exc_raise
    raise self._exception[1].with_traceback(self._exception[2])
  File "/usr/lib/python3/dist-packages/apport/REThread.py", line 34, in run
    self._retval = self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python3/dist-packages/apport/crashdb_impl/launchpad.py", line 186, in upload
    blob_file = self._generate_upload_blob(report)
  File "/usr/lib/python3/dist-packages/apport/crashdb_impl/launchpad.py", line 913, in _generate_upload_blob
    hdr['Tags'] += ' ' + self._filter_tag_names(report['Tags'])
  File "/usr/lib/python3/dist-packages/apport/crashdb_impl/launchpad.py", line 952, in _filter_tag_names
    if ch.isspace() or ch.isalpha() or ch.isdigit() or (len(res) > 0 and ch in b'+-.'):
AttributeError: 'int' object has no attribute 'isspace'