Comment 6 for bug 1851806

Simply removing O_PATH from the line in question leads to:

Traceback (most recent call last):
  File "/usr/share/apport/apport-gtk", line 597, in <module>
    app.run_argv()
  File "/usr/lib/python2.7/dist-packages/apport/ui.py", line 661, in run_argv
    return self.run_update_report()
  File "/usr/lib/python2.7/dist-packages/apport/ui.py", line 559, in run_update_report
    self.report.add_proc_environ()
  File "/usr/lib/python2.7/dist-packages/apport/report.py", line 592, in add_proc_environ
    env = _read_file('environ', dir_fd=proc_pid_fd).replace('\n', '\\n')
  File "/usr/lib/python2.7/dist-packages/apport/report.py", line 73, in _read_file
    with open(path, 'rb', opener=lambda path, mode: os.open(path, mode, dir_fd=dir_fd)) as fd:
TypeError: 'opener' is an invalid keyword argument for this function

(Linux Mint 18.2, python-apport 2.20.1-0ubuntu2.21)