Apparent regression bug from Python 3.8 to 3.9: can't launch scripts using absolute Windows paths

Derek Foster
Mon Apr 25 06:58:53 GMT 2022

Hi, folks.

I have been having problems with Python 3.9 packaged with Cygwin that I did not have with Python 3.8.

Specifically, I am seeing the following:

C:\example>copy con
#!/usr/bin/env python3



C:\example>c:\cygwin64\bin\python3.8 C:\example\

C:\example>c:\cygwin64\bin\python3.9 C:\example\
/usr/bin/python3.9: can't open file '/cygdrive/c/example/C:\example\': [Errno 2] No such file or directory

There is an open bug on CPython for this ( ), but the people there seem to think it's something that the Cygwin folks should probably address, and I haven't been able to find a corresponding Cygwin bug.

What do I need to do to get this information to the appropriate team so that this bug can be fixed?

Thanks for any information!

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