[issue25800] errors running test_capi from command line

[Martin Panter]

Martin Panter added the comment:

The code looks like it is trying to find the root of the source code tree, and then chdir() to it and access /Programs/_testembed etc.

In your case the chain of dirname() calls returns an empty string because that root is already the current directory. I would make chdir() conditional:

if basepath:
    os.chdir(basepath)

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nosy: +martin.panter

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<http://bugs.python.org/issue25800>
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