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gh-148575: Use the right entry to read the set of file descriptors on CYGWIN by carlo-bramini · Pull Request #148576 · python/cpython · GitHub

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gh-148575: Use the right entry to read the set of file descriptors on CYGWIN - #148576

Merged
vstinner merged 1 commit into
python:mainfrom
carlo-bramini:fix-cygwin-error-1
May 13, 2026
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gh-148575: Use the right entry to read the set of file descriptors on CYGWIN#148576
vstinner merged 1 commit into
python:mainfrom
carlo-bramini:fix-cygwin-error-1

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carlo-bramini commented Apr 14, 2026 •
edited by bedevere-app Bot
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carlo-bramini requested a review from gpshead as a code owner April 14, 2026 22:11

bedevere-app Bot commented Apr 14, 2026

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Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.

bedevere-app Bot mentioned this pull request Apr 14, 2026
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vstinner commented May 13, 2026

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LGTM. I confirm that using this change, subprocess.run() is able to list open file descriptors from /dev/fd/.

vstinner enabled auto-merge (squash) May 13, 2026 19:45
vstinner merged commit b6854c5 into python:main May 13, 2026
96 of 98 checks passed

vstinner commented May 13, 2026

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Merged, thanks for this enhancement!

bedevere-bot commented May 13, 2026

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⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot iOS ARM64 Simulator 3.x (tier-3) has failed when building commit b6854c5.

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/#/builders/1380/builds/6637) and take a look at the build logs.
  4. Check if the failure is related to this commit (b6854c5) 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/#/builders/1380/builds/6637

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

Click to see traceback logs 
remote: Enumerating objects: 4, done.        
remote: Counting objects:  25% (1/4)        
remote: Counting objects:  50% (2/4)        
remote: Counting objects:  75% (3/4)        
remote: Counting objects: 100% (4/4)        
remote: Counting objects: 100% (4/4), done.        
remote: Compressing objects:  33% (1/3)        
remote: Compressing objects:  66% (2/3)        
remote: Compressing objects: 100% (3/3)        
remote: Compressing objects: 100% (3/3), done.        
remote: Total 4 (delta 1), reused 1 (delta 1), pack-reused 0 (from 0)        
From https://github.com/python/cpython
 * branch                    main       -> FETCH_HEAD
Note: switching to 'b6854c50988761b305972e6e83b642c46cf00448'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at b6854c50988 gh-148575: Use /dev/fd/ to read the set of file descriptors on Cygwin (#148576)
Switched to and reset branch 'main'

configure: WARNING: no system libmpdec found; falling back to pure-Python version for the decimal module
configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.

configure: WARNING: unrecognized options: --with-system-libmpdec
configure: WARNING: unrecognized options: --with-system-libmpdec
configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.
ld: warning: ignoring duplicate libraries: '-lm'
In file included from ../../Modules/_remote_debugging/module.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/gc_stats.c:7:
In file included from ../../Modules/_remote_debugging/gc_stats.h:14:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
In file included from ../../Modules/_remote_debugging/object_reading.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
In file included from ../../Modules/_remote_debugging/frames.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/code_objects.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/frame_cache.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
1 warning generated.
1 warning generated.
1 warning generated.
In file included from ../../Modules/_remote_debugging/threads.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/binary_io_writer.c:13:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
In file included from ../../Modules/_remote_debugging/asyncio.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/binary_io_reader.c:13:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/subprocess.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../Modules/_remote_debugging/subprocess.c:100:1: warning: unused function 'find_children_bfs' [-Wunused-function]
  100 | find_children_bfs(pid_t target_pid, int recursive,
      | ^~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/interpreters.c:7:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 warnings generated.
1 warning generated.
1 warning generated.
1 warning generated.
1 warning generated.
ld: warning: ignoring duplicate libraries: '-lm'
configure: WARNING: unrecognized options: --with-system-libmpdec
configure: WARNING: unrecognized options: --with-system-libmpdec
configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.
ld: warning: ignoring duplicate libraries: '-lm'
In file included from ../../Modules/_remote_debugging/module.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/gc_stats.c:7:
In file included from ../../Modules/_remote_debugging/gc_stats.h:14:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/object_reading.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
1 warning generated.
In file included from ../../Modules/_remote_debugging/code_objects.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/frames.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
In file included from ../../Modules/_remote_debugging/frame_cache.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/threads.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/asyncio.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
1 warning generated.
1 warning generated.
In file included from ../../Modules/_remote_debugging/binary_io_writer.c:13:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
In file included from ../../Modules/_remote_debugging/binary_io_reader.c:13:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/subprocess.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../Modules/_remote_debugging/subprocess.c:100:1: warning: unused function 'find_children_bfs' [-Wunused-function]
  100 | find_children_bfs(pid_t target_pid, int recursive,
      | ^~~~~~~~~~~~~~~~~
1 warning generated.
In file included from ../../Modules/_remote_debugging/interpreters.c:7:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 warnings generated.
1 warning generated.
1 warning generated.
1 warning generated.
ld: warning: ignoring duplicate libraries: '-lm'
configure: WARNING: unrecognized options: --with-system-libmpdec
configure: WARNING: x86_64-apple-ios-simulator/clang is not supported
configure: WARNING: unrecognized options: --with-system-libmpdec
configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.
configure: WARNING:

Platform "x86_64-apple-ios-simulator" with compiler "clang" is not supported by the
CPython core team, see https://peps.python.org/pep-0011/ for more information.

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(brc.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(dynamic_annotations.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(gc_free_threading.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(index_pool.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(jit.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(jit_publish.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(optimizer_analysis.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(optimizer_symbols.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(pystats.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(stackrefs.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(uniqueid.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(perf_jit_trampoline.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(jit_unwind.o) has no symbols
ld: warning: ignoring duplicate libraries: '-lm'
In file included from ../../Modules/_remote_debugging/module.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/object_reading.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/gc_stats.c:7:
In file included from ../../Modules/_remote_debugging/gc_stats.h:14:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
1 warning generated.
In file included from ../../Modules/_remote_debugging/code_objects.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/frames.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/frame_cache.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
1 warning generated.
In file included from ../../Modules/_remote_debugging/threads.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
In file included from ../../Modules/_remote_debugging/asyncio.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
1 warning generated.
In file included from ../../Modules/_remote_debugging/binary_io_writer.c:13:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/binary_io_reader.c:13:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../../Modules/_remote_debugging/subprocess.c:8:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../Modules/_remote_debugging/subprocess.c:100:1: warning: unused function 'find_children_bfs' [-Wunused-function]
  100 | find_children_bfs(pid_t target_pid, int recursive,
      | ^~~~~~~~~~~~~~~~~
2 warnings generated.
In file included from ../../Modules/_remote_debugging/interpreters.c:7:
In file included from ../../Modules/_remote_debugging/_remote_debugging.h:34:
../../Modules/_remote_debugging/../../Python/remote_debug.h:165:1: warning: unused function '_Py_RemoteDebug_ValidatePyRuntimeCookie' [-Wunused-function]
  165 | _Py_RemoteDebug_ValidatePyRuntimeCookie(proc_handle_t *handle, uintptr_t address)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
1 warning generated.
1 warning generated.
1 warning generated.
ld: warning: ignoring duplicate libraries: '-lm'

--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:iOS Simulator, id:4F9AFDE7-A49A-46AD-B161-FCA22E48EA55, OS:18.3.1, name:iPhone SE (3rd generation) }
{ platform:iOS Simulator, id:4F9AFDE7-A49A-46AD-B161-FCA22E48EA55, OS:18.3.1, name:iPhone SE (3rd generation) }

carlo-bramini deleted the fix-cygwin-error-1 branch May 14, 2026 07:44

carlo-bramini commented May 14, 2026

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⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot iOS ARM64 Simulator 3.x (tier-3) has failed when building commit b6854c5.

What do you need to do:

1. Don't panic.

2. Check [the buildbot page in the devguide](https://devguide.python.org/buildbots/) 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/#/builders/1380/builds/6637) and take a look at the build logs.

4. Check if the failure is related to this commit ([b6854c5](https://github.com/python/cpython/commit/b6854c50988761b305972e6e83b642c46cf00448)) 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/#/builders/1380/builds/6637

Summary of the results of the build (if available):
Click to see traceback logs

I read this log, but it seems to me that this error has nothing to do with the fix introduced by this PR.

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gpshead Awaiting requested review from gpshead gpshead is a code owner

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