Arc doesn't work

[Simon Peyton Jones]

I can't use arc.  At the end of 'arc diff' it says

Exception

Some linters failed:

    - CommandException: Command failed with error #1!

      COMMAND

      python3 .arc-linters/check-cpp.py 'compiler/basicTypes/Id.hs'



      STDOUT

      (empty)



      STDERR

        File ".arc-linters/check-cpp.py", line 28

          r = re.compile(rb'ASSERT\s+\(')

                                       ^

      SyntaxError: invalid syntax



(Run with `--trace` for a full exception trace.)



simonpj at cam-05-unx:~/code/HEAD-3$ python3 --version

python3 --version

Python 3.2.3
Alas.
Simon
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