[issue43113] os.posix_spawn errors with wrong information when shebang points to not-existing file

[Miro Hrončok]

Miro Hrončok <miro at hroncok.cz> added the comment:

That was "ideal" error message. If we don't have all the information, we cannot have the ideal error message. But we need to adapt the default error message to not be misleading. What about:

FileNotFoundError: [Errno 2] No such file or directory: Either './demo' or the interpreter of './demo' not found.

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<https://bugs.python.org/issue43113>
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