Fix (non-container) pytest stdout buffering-related lock-up #1963
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Two issues: 1. When one of the stdout/stderr pipe buffers of a process started with `subprocess.Popen` is full, the process can get blocked until the buffer is drained. 2. Calling `Popen.wait` can deadlock when called before draining the pipe buffers (if they are full). This avoids the issue altogether by giving the child process a temporary file to write to.
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What does this PR do?
Two issues:
subprocess.Popenis full, the process can get blocked until the buffer is drained.Popen.waitcan deadlock when called before draining the pipe buffers (if they are full).This avoids the issue altogether by giving the child process a temporary file to write to.
Fixes # (issue)
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