Multiprocessing Test Issue - signal.set_wakeup_fd errors #6700
Description
Summary
When running the test_multiprocessing_* suite, there are differences in test output that, while not impeding the tests, are output while running the suite, but are in CPython.
Details
For some tests, this error is popping up:
Exception ignored in: <function on_fork at 0x5607124ce900>
Exception ignored in: <function on_fork at 0x5607124ce900>
Exception ignored in: <function on_fork at 0x5607124ce900>
File "RustPython/crates/pylib/Lib/asyncio/events.py", line 880, in on_fork
signal.set_wakeup_fd(-1)
^
ValueError: signal only works in main thread
File "RustPython/crates/pylib/Lib/asyncio/events.py", line 880, in on_fork
signal.set_wakeup_fd(-1)
^
ValueError: signal only works in main thread
File "RustPython/crates/pylib/Lib/asyncio/events.py", line 880, in on_fork
signal.set_wakeup_fd(-1)
^
ValueError: signal only works in main thread
These tests include (but are not limited to):
test.test_multiprocessing_fork.test_manager.WithManagerTestPool.test_async_timeouttest.test_multiprocessing_fork.test_manager.WithManagerTestPool.test_empty_iterabletest.test_multiprocessing_fork.test_manager.WithManagerTestPool.test_map_no_failfasttest.test_multiprocessing_fork.test_manager.WithManagerTestPool.test_terminatetest.test_multiprocessing_fork.test_manager.WithManagerTestPool.test_wrapped_exception