Comment 1 for bug 1607942

Well, it seems to work now without stack tracing with current flake8 (3.3.0) in that running flake8 will report hacking problems (such as H304). However, hacking still , but hacking 0.13.0 still explicitly states dependencies on flake8, pyflakes and mccabe at older versions:

  flake8<2.6.0,>=2.5.4
  pyflakes==0.8.1
  mccabe==0.2.1