FYI, the earlier failure is due to trying to delete a file that Windows still had open. To deal with that, I've switched to a different approach that does not copy the extension file.

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot wasm32-wasi 3.x has failed when building commit b365d88.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/1046/builds/1411) and take a look at the build logs.
4. Check if the failure is related to this commit (b365d88) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/1046/builds/1411

Failed tests:

• test_imp

Summary of the results of the build (if available):

== Tests result: FAILURE ==

325 tests OK.

10 slowest tests:

• test_math: 1 min 47 sec
• test_tokenize: 1 min 12 sec
• test_lib2to3: 49.0 sec
• test_unparse: 44.3 sec
• test_capi: 24.4 sec
• test_hashlib: 24.2 sec
• test_pickle: 19.3 sec
• test_statistics: 18.7 sec
• test_unicodedata: 16.1 sec
• test_decimal: 12.9 sec

1 test failed:
test_imp

108 tests skipped:
test__xxinterpchannels test__xxsubinterpreters test_asyncgen
test_asyncio test_bz2 test_check_c_globals test_clinic
test_cmd_line test_concurrent_futures test_contextlib_async
test_ctypes test_curses test_dbm_gnu test_dbm_ndbm test_devpoll
test_doctest test_docxmlrpc test_dtrace test_embed test_epoll
test_faulthandler test_fcntl test_file_eintr test_fork1
test_ftplib test_gdb test_grp test_gzip test_httplib
test_httpservers test_idle test_imaplib test_interpreters
test_ioctl test_kqueue test_launcher test_lzma test_mailbox
test_mmap test_msilib test_multiprocessing_fork
test_multiprocessing_forkserver test_multiprocessing_main_handling
test_multiprocessing_spawn test_nis test_openpty test_ossaudiodev
test_pdb test_peg_generator test_perf_profiler test_pipes
test_poll test_poplib test_pty test_pwd test_queue test_readline
test_regrtest test_repl test_resource test_select test_selectors
test_smtplib test_smtpnet test_socket test_socketserver test_spwd
test_sqlite3 test_ssl test_stable_abi_ctypes test_startfile
test_subprocess test_sys_settrace test_syslog test_tcl
test_telnetlib test_thread test_threadedtempfile test_threading
test_threading_local test_tix test_tkinter test_tools test_ttk
test_ttk_textonly test_turtle test_urllib test_urllib2
test_urllib2_localnet test_urllib2net test_urllib_response
test_urllibnet test_venv test_wait3 test_wait4 test_webbrowser
test_winconsoleio test_winreg test_winsound test_wmi test_wsgiref
test_xmlrpc test_xmlrpc_net test_xxlimited test_zipfile64
test_zipimport_support test_zlib test_zoneinfo
0:06:18 load avg: 6.06
0:06:18 load avg: 6.06 Re-running failed tests is not supported with --python host runner option.

Total duration: 6 min 18 sec

Traceback (most recent call last):
  File "/Lib/test/libregrtest/runtest.py", line 360, in _runtest_inner
    refleak = _runtest_inner2(ns, test_name)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Lib/test/libregrtest/runtest.py", line 300, in _runtest_inner2
    the_module = importlib.import_module(abstest)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Lib/importlib/__init__.py", line 124, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1334, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1307, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1278, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 841, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1015, in exec_module
  File "<frozen importlib._bootstrap>", line 400, in _call_with_frames_removed
  File "/Lib/test/test_imp.py", line 19, in <module>
    import _xxsubinterpreters as _interpreters
ModuleNotFoundError: No module named '_xxsubinterpreters'

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot wasm32-emscripten node (pthreads) 3.x has failed when building commit b365d88.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/1050/builds/1370) and take a look at the build logs.
4. Check if the failure is related to this commit (b365d88) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/1050/builds/1370

Failed tests:

• test_imp

Summary of the results of the build (if available):

== Tests result: FAILURE ==

338 tests OK.

10 slowest tests:

• test_math: 1 min 15 sec
• test_tokenize: 56.7 sec
• test_unparse: 42.4 sec
• test_lib2to3: 29.1 sec
• test_capi: 28.7 sec
• test_io: 24.7 sec
• test_hashlib: 22.4 sec
• test_zipfile: 19.0 sec
• test_unicodedata: 16.8 sec
• test_decimal: 13.0 sec

1 test failed:
test_imp

95 tests skipped:
test__xxinterpchannels test__xxsubinterpreters test_asyncgen
test_asyncio test_check_c_globals test_clinic test_cmd_line
test_concurrent_futures test_contextlib_async test_ctypes
test_curses test_dbm_gnu test_dbm_ndbm test_devpoll test_doctest
test_docxmlrpc test_dtrace test_embed test_epoll test_faulthandler
test_fcntl test_file_eintr test_fork1 test_ftplib test_gdb
test_grp test_httplib test_httpservers test_idle test_imaplib
test_interpreters test_ioctl test_kqueue test_launcher test_lzma
test_mmap test_msilib test_multiprocessing_fork
test_multiprocessing_forkserver test_multiprocessing_main_handling
test_multiprocessing_spawn test_nis test_openpty test_ossaudiodev
test_pdb test_peg_generator test_perf_profiler test_poll
test_poplib test_pty test_pwd test_readline test_regrtest
test_repl test_resource test_select test_selectors test_smtplib
test_smtpnet test_socket test_socketserver test_spwd test_ssl
test_stable_abi_ctypes test_startfile test_subprocess
test_sys_settrace test_syslog test_tcl test_telnetlib test_tix
test_tkinter test_tools test_ttk test_ttk_textonly test_turtle
test_urllib2 test_urllib2_localnet test_urllib2net test_urllibnet
test_venv test_wait3 test_wait4 test_webbrowser test_winconsoleio
test_winreg test_winsound test_wmi test_wsgiref test_xmlrpc
test_xmlrpc_net test_xxlimited test_zipfile64
test_zipimport_support test_zoneinfo
0:15:25 load avg: 5.04
0:15:25 load avg: 5.04 Re-running failed tests is not supported with --python host runner option.

Total duration: 15 min 25 sec

Traceback (most recent call last):
  File "/opt/buildbot/bcannon-wasm/3.x.bcannon-wasm.emscripten-node-pthreads/build/Lib/test/libregrtest/runtest.py", line 360, in _runtest_inner
    refleak = _runtest_inner2(ns, test_name)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/buildbot/bcannon-wasm/3.x.bcannon-wasm.emscripten-node-pthreads/build/Lib/test/libregrtest/runtest.py", line 300, in _runtest_inner2
    the_module = importlib.import_module(abstest)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/buildbot/bcannon-wasm/3.x.bcannon-wasm.emscripten-node-pthreads/build/Lib/importlib/__init__.py", line 124, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1334, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1307, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1278, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 841, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1015, in exec_module
  File "<frozen importlib._bootstrap>", line 400, in _call_with_frames_removed
  File "/opt/buildbot/bcannon-wasm/3.x.bcannon-wasm.emscripten-node-pthreads/build/Lib/test/test_imp.py", line 19, in <module>
    import _xxsubinterpreters as _interpreters
ModuleNotFoundError: No module named '_xxsubinterpreters'

I'm going to look into the wasm builtbot failures.