I'm getting multiple test failures with latest Alpine 3.15 and musl-1.2.2-r7. Some test failures may be caused by wrong assumptions in our tests, some might be bugs in musl lib.c

9 tests failed:
    test__locale test_c_locale_coercion test_cmd_line test_gdb
    test_locale test_os test_posix test_re test_selectors

I have attached the output of

./python -m test -v test__locale test_c_locale_coercion test_cmd_line test_gdb test_locale test_os test_posix test_re test_selectors 2>&1 | tee alpine315-tests.txt

You can use my container to reproduce the test failures:

$ podman run --privileged -ti --rm -v $(pwd):/cpython:Z quay.io/tiran/cpythonbuild:alpine-3.15 /bin/sh
# /cmd.sh
# cd /cpython/builddep/alpine-3.15-x86_64/
# make test