[issue41594] Intermittent failures of loop.subprocess_exec() to capture output

Kyle Meyer added the comment: I should have thought to provide the output of when debug=True is passed to asyncio.run(). Here it is, with the python on my Debian system: $ python3 -V Python 3.7.3 $ python3 reproducer.py Iteration: 1 of 100 Failed on iteration 1

[issue41594] Intermittent failures of loop.subprocess_exec() to capture output

Yaroslav Halchenko added the comment: Might (although unlikely) be related to https://bugs.python.org/issue40634 which is about BlockingIOError being raised (and ignored) if SelectorEventLoop is reused (not the case here) also in the case of short lived processes. -- nosy:

[issue41594] Intermittent failures of loop.subprocess_exec() to capture output

New submission from Kyle Meyer : I've been debugging an intermittent test failure in code that calls `loop.subprocess_exec` with an `asyncio.SubprocessProtocol` subclass. Here's a minimal example that I hope captures the issue. It's based closely off of the `DateProtocol` [example][1] in the