[issue35214] Get the test suite passing with clang Memory Sanitizer enabled

[Gregory P. Smith]

Gregory P. Smith <greg at krypto.org> added the comment:

Status on my upcoming buildbot host after today's changes:

== Tests result: FAILURE ==

375 tests OK.

11 tests failed:
    test_asyncio test_builtin test_code test_ctypes test_ioctl
    test_openpty test_os test_posix test_pty test_shutil test_uuid

32 tests skipped:
    test_bz2 test_curses test_dbm_gnu test_dbm_ndbm test_devpoll
    test_gzip test_idle test_kqueue test_lzma test_msilib
    test_ossaudiodev test_readline test_smtpnet test_socketserver
    test_sqlite test_ssl test_startfile test_tcl test_timeout test_tix
    test_tk test_ttk_guionly test_ttk_textonly test_turtle
    test_urllib2net test_urllibnet test_winconsoleio test_winreg
    test_winsound test_xmlrpc_net test_zipfile64 test_zlib


Most of those are dying due to pty use (openpty, etc) which is not properly memory sanitizer traced.  test_posix appears to have something
I can fix by annotating in the code.

after that, I'll decide how to tell my buildbot not to run those tests so we can have a green buildbot memory sanitizing everything else.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35214>
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