[3.6] closes bpo-32859: Don't retry dup3() if it is not available at runtime (GH-5708) - #5769

[3.6] closes bpo-32859: Don't retry dup3() if it is not available at runtime (GH-5708)#5769

benjaminp merged 1 commit into

python:3.6python/cpython:3.6from

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