diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py index cf7683fee64621..96e6d73a759794 100644 --- a/Lib/asyncio/unix_events.py +++ b/Lib/asyncio/unix_events.py @@ -223,7 +223,8 @@ async def _make_subprocess_transport(self, protocol, args, shell, return transp def _child_watcher_callback(self, pid, returncode, transp): - self.call_soon_threadsafe(transp._process_exited, returncode) + # Skip one iteration for callbacks to be executed + self.call_soon_threadsafe(self.call_soon, transp._process_exited, returncode) async def create_unix_connection( self, protocol_factory, path=None, *, diff --git a/Misc/NEWS.d/next/Library/2022-09-22-11-50-29.gh-issue-85760.DETTPd.rst b/Misc/NEWS.d/next/Library/2022-09-22-11-50-29.gh-issue-85760.DETTPd.rst new file mode 100644 index 00000000000000..af8ae2026f16d3 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2022-09-22-11-50-29.gh-issue-85760.DETTPd.rst @@ -0,0 +1 @@ +Fix race condition in :mod:`asyncio` where :meth:`~asyncio.SubprocessProtocol.process_exited` called before the :meth:`~asyncio.SubprocessProtocol.pipe_data_received` leading to inconsistent output. Patch by Kumar Aditya.