test_close_all_fds closes the socket through the IOLoop's shadow socket
and then reads s.closed. pyzmq implements that by calling
zmq_getsockopt() on the handle, which libzmq's reaper thread may already
have freed. With glibc the memory stays mapped, libzmq's tag check fails
and ENOTSOCK comes back; musl's allocator can unmap it, so the ptest run
segfaults intermittently and loses every result after it:
File ".../tests/test_future.py", line 319 in test_close_all_fds
Segmentation fault (core dumped)
Closing a socket via a shadow and then querying .closed on the original
segfaults on musl every time in a standalone reproducer and survives on
glibc. Skip the test for musl.
Tested with meta-python-image-ptest-python3-pyzmq on qemux86-64 with
yoe-musl-systemd-wayland.
AI-Generated: Uses Claude Code
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
Khem Raj
Wang Mingyu