GHCi tests hanging on Mac

[Richard Eisenberg]

Hi devs,

Some GHCi tests (but far from all!) hang on my Mac. I can't reproduce this behavior outside the testsuite driver, so I think it's the Python code, not the Haskell.

Failing tests:
  ghci/prog017/prog017
  ghci/scripts/T6018ghcifail
  ghci/scripts/T6018ghcirnfail

And that's it! My Python reports that it's 2.7.13.

Any leads to follow?

Thanks,
Richard