weird = "pass #\r#\n"
exec(weird) # works, as does `compile` etc.
black.format_str(weird, mode=black.FileMode()) # fails with `black.InvalidInput`
Operating system: Windows
Python version: 3.7.3
Black version: 19.3b0
Does also happen on master: yes (website hangs)
I found this weird little string with hypothesmith, a tool for generating Python source code with Hypothesis that I started at the PyCon NA sprints and published at the PyCon AU sprints. Currently it works based on an approximate grammar, post-processing, and filtering.
CC @ambv who I know was interested in fuzzing 😄. Next steps... I think a combination of targeted mutation (open PR upstream) and spending more than a few minutes of CPU time could turn up a lot more weird things!
Operating system: Windows Python version: 3.7.3 Black version: 19.3b0 Does also happen on master: yes (website hangs)
I found this weird little string with
hypothesmith
, a tool for generating Python source code with Hypothesis that I started at the PyCon NA sprints and published at the PyCon AU sprints. Currently it works based on an approximate grammar, post-processing, and filtering.CC @ambv who I know was interested in fuzzing 😄. Next steps... I think a combination of targeted mutation (open PR upstream) and spending more than a few minutes of CPU time could turn up a lot more weird things!