[PR #8089/dc38630b backport][3.9] 💅 Propagate error causes via asyncio protocols #8162
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This is a backport of PR #8089 as merged into master (dc38630).
This is supposed to unify setting exceptions on the future objects, allowing to also attach their causes whenever available. It'll make possible for the end-users to see more detailed tracebacks.
It's also supposed to help with tracking down what's happening with #4581.
PR #8089
Co-Authored-By: J. Nick Koston [email protected]
Co-Authored-By: Sam Bull [email protected]
(cherry picked from commit dc38630)