[3.7] closes bpo-32859: Don't retry dup3() if it is not available at runtime (GH-5708) - #5768

[3.7] closes bpo-32859: Don't retry dup3() if it is not available at runtime (GH-5708)#5768

benjaminp merged 1 commit into

python:3.7python/cpython:3.7from

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