Traceback (most recent call last):
  File "/usr/share/apport/package-hooks/dkms_packages.py", line 99, in <module>
    report.write(open(apport.fileutils.make_report_path(report), 'w'))
  File "/usr/lib/python2.7/dist-packages/problem_report.py", line 251, in write
    self._assert_bin_mode(file)
  File "/usr/lib/python2.7/dist-packages/problem_report.py", line 629, in _assert_bin_mode
    assert (type(file) == BytesIO or 'b' in file.mode), 'file stream must be in binary mode'
AssertionError: file stream must be in binary mode