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Date: Mon, 25 Apr 2022 01:58:53 -0500 (CDT)
From: Derek Foster <foster@coherentlogix.com>
To: cygwin@cygwin.com
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Subject: Apparent regression bug from Python 3.8 to 3.9: can't launch
 scripts using absolute Windows paths
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Thread-Topic: Apparent regression bug from Python 3.8 to 3.9: can't launch
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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 test.py
#!/usr/bin/env python3
print('hello')
^Z

C:\example>c:\cygwin64\bin\python3.8 test.py
hello

C:\example>c:\cygwin64\bin\python3.9 test.py
hello

C:\example>c:\cygwin64\bin\python3.8 C:\example\test.py
hello

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

There is an open bug on CPython for this ( https://github.com/python/cpython/issues/90907 ), 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!