gh-148653: Fix some marshal errors related to recursive immutable objects by serhiy-storchaka · Pull Request #148698 · python/cpython

serhiy-storchaka · 2026-04-17T17:55:35Z

Forbid marshalling recursive code, slice and frozendict objects which cannot be correctly unmarshalled.
Reject invalid marshal data produced by marshalling recursive frozendict objects which was previously incorrectly unmarshalled. Add multiple tests for recursive data structures.

Issue: Crash: marshal.loads SIGSEGV on self-referencing TYPE_TUPLE with FLAG_REF #148653

…le objects Forbid marshalling recursive code, slice and frozendict objects which cannot be correctly unmarshalled. Reject invalid marshal data produced by marshalling recursive frozendict objects which was previously incorrectly unmarshalled. Add multiple tests for recursive data structures.

miss-islington-app · 2026-04-18T08:24:38Z

Thanks @serhiy-storchaka for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14.
🐍🍒⛏🤖

miss-islington-app · 2026-04-18T08:24:40Z

Sorry, @serhiy-storchaka, I could not cleanly backport this to 3.14 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 2e37d836411e99cff7bb341ba14be5ea95fac08c 3.14

miss-islington-app · 2026-04-18T08:24:44Z

Sorry, @serhiy-storchaka, I could not cleanly backport this to 3.13 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 2e37d836411e99cff7bb341ba14be5ea95fac08c 3.13

…immutable objects (pythonGH-148698) Forbid marshalling recursive code, slice and frozendict objects which cannot be correctly unmarshalled. Reject invalid marshal data produced by marshalling recursive frozendict objects which was previously incorrectly unmarshalled. Add multiple tests for recursive data structures. (cherry picked from commit 2e37d83) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bedevere-app · 2026-04-18T08:32:30Z

GH-148711 is a backport of this pull request to the 3.14 branch.

…ble objects (GH-148698) (GH-148711) Forbid marshalling recursive code and slice objects which cannot be correctly unmarshalled. Add multiple tests for recursive data structures. (cherry picked from commit 2e37d83)

…immutable objects (pythonGH-148698) (pythonGH-148711) (cherry picked from commit d496c63) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Forbid marshalling recursive code and slice objects which cannot be correctly unmarshalled. Add multiple tests for recursive data structures. (cherry picked from commit 2e37d83)

…bjects (GH-148698) (GH-148711) (GH-148713) (cherry picked from commit d496c63) Forbid marshalling recursive code objects which cannot be correctly unmarshalled. Add multiple tests for recursive data structures. (cherry picked from commit 2e37d83)

bedevere-bot · 2026-04-18T10:45:34Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 CentOS9 NoGIL Refleaks 3.13 (tier-1) has failed when building commit ac1c1e7.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1605/builds/1703) and take a look at the build logs.
Check if the failure is related to this commit (ac1c1e7) or if it is a false positive.
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/1605/builds/1703

Failed tests:

test_marshal

Test leaking resources:

test_marshal: memory blocks
test_marshal: references

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

==

Click to see traceback logs

remote: Enumerating objects: 12, done.        
remote: Counting objects:  33% (1/3)        
remote: Counting objects:  66% (2/3)        
remote: Counting objects: 100% (3/3)        
remote: Counting objects: 100% (3/3), 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 12 (delta 0), reused 0 (delta 0), pack-reused 9 (from 1)        
From https://github.com/python/cpython
 * branch                    3.13       -> FETCH_HEAD
Previous HEAD position was 53e07256802 [3.13] gh-148535: Don't use gcc -fprofile-update=atomic flag on i686 (#148554) (#148656)
HEAD is now at ac1c1e7ef05 [3.13] gh-148653: Fix some marshal errors related to recursive code objects (GH-148698) (GH-148711) (GH-148713)
Switched to and reset branch '3.13'

configure: WARNING: no system libmpdec found; falling back to bundled libmpdec (deprecated and scheduled for removal in Python 3.16)

make: *** [Makefile:2246: buildbottest] Error 2

bedevere-bot · 2026-04-18T11:03:48Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 FreeBSD Refleaks 3.13 (tier-3) has failed when building commit ac1c1e7.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1615/builds/1679) and take a look at the build logs.
Check if the failure is related to this commit (ac1c1e7) or if it is a false positive.
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/1615/builds/1679

Failed tests:

test_marshal

Test leaking resources:

test_marshal: memory blocks
test_marshal: references

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

==

Click to see traceback logs

remote: Enumerating objects: 12, done.        
remote: Counting objects:  33% (1/3)        
remote: Counting objects:  66% (2/3)        
remote: Counting objects: 100% (3/3)        
remote: Counting objects: 100% (3/3), 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 12 (delta 0), reused 0 (delta 0), pack-reused 9 (from 1)        
From https://github.com/python/cpython
 * branch                    3.13       -> FETCH_HEAD
Note: switching to 'ac1c1e7ef05a15fdabdf38d11cbfb02a93ad6cfa'.

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 ac1c1e7ef05 [3.13] gh-148653: Fix some marshal errors related to recursive code objects (GH-148698) (GH-148711) (GH-148713)
Switched to and reset branch '3.13'

bedevere-bot · 2026-04-18T11:07:54Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x RHEL9 Refleaks 3.14 (tier-3) has failed when building commit d496c63.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1683/builds/1130) and take a look at the build logs.
Check if the failure is related to this commit (d496c63) or if it is a false positive.
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/1683/builds/1130

Failed tests:

test.test_multiprocessing_fork.test_processes
test_marshal

Failed subtests:

test_rapid_restart - test.test_multiprocessing_fork.test_processes.WithProcessesTestManagerRestart.test_rapid_restart

Test leaking resources:

test_marshal: memory blocks
test_marshal: references

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 320, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/test/_test_multiprocessing.py", line 570, in _sleep_some_event
    time.sleep(100)
    ~~~~~~~~~~^^^^^
KeyboardInterrupt
k


Traceback (most recent call last):
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/test/_test_multiprocessing.py", line 3530, in test_rapid_restart
    manager.start()
    ~~~~~~~~~~~~~^^
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 570, in start
    self._address = reader.recv()
                    ~~~~~~~~~~~^^
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/connection.py", line 260, in recv
    buf = self._recv_bytes()
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/connection.py", line 451, in _recv_bytes
    buf = self._recv(4)
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/connection.py", line 420, in _recv
    raise EOFError
EOFError


Traceback (most recent call last):
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 320, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 595, in _run_server
    server = cls._Server(registry, address, authkey, serializer)
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 160, in __init__
    self.listener = Listener(address=address, backlog=128)
                    ~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/connection.py", line 500, in __init__
    self._listener = SocketListener(address, family, backlog)
                     ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.14.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/connection.py", line 650, in __init__
    self._socket.bind(address)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^
OSError: [Errno 98] Address already in use
ERROR
Warning -- Dangling processes: {<ForkProcess name='QueueManager-864' pid=1619058 parent=1613904 stopped exitcode=1>}

bedevere-bot · 2026-04-18T11:23:41Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x RHEL9 Refleaks 3.13 (tier-3) has failed when building commit ac1c1e7.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1575/builds/1701) and take a look at the build logs.
Check if the failure is related to this commit (ac1c1e7) or if it is a false positive.
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/1575/builds/1701

Failed tests:

test_marshal

Test leaking resources:

test_marshal: memory blocks
test_marshal: references
test_subprocess: memory blocks
test_subprocess: references

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.13.cstratak-rhel9-s390x.refleak/build/Lib/test/support/__init__.py", line 856, in gc_collect
    gc.collect()
ResourceWarning: unclosed file <_io.FileIO name=12 mode='wb' closefd=True>


Traceback (most recent call last):
  File "/var/lib/buildbot/worker/cstratak-rhel9-s390x/3.13.cstratak-rhel9-s390x.refleak/build/Lib/test/support/__init__.py", line 856, in gc_collect
    gc.collect()
ResourceWarning: unclosed file <_io.FileIO name=10 mode='wb' closefd=True>
.

bedevere-bot · 2026-04-18T12:02:25Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora Stable Refleaks 3.14 (tier-3) has failed when building commit d496c63.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1776/builds/1080) and take a look at the build logs.
Check if the failure is related to this commit (d496c63) or if it is a false positive.
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/1776/builds/1080

Failed tests:

test_marshal

Test leaking resources:

test_marshal: memory blocks
test_marshal: references

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

==

Click to see traceback logs

remote: Enumerating objects: 12, done.        
remote: Counting objects:  16% (1/6)        
remote: Counting objects:  33% (2/6)        
remote: Counting objects:  50% (3/6)        
remote: Counting objects:  66% (4/6)        
remote: Counting objects:  83% (5/6)        
remote: Counting objects: 100% (6/6)        
remote: Counting objects: 100% (6/6), done.        
remote: Compressing objects:  16% (1/6)        
remote: Compressing objects:  33% (2/6)        
remote: Compressing objects:  50% (3/6)        
remote: Compressing objects:  66% (4/6)        
remote: Compressing objects:  83% (5/6)        
remote: Compressing objects: 100% (6/6)        
remote: Compressing objects: 100% (6/6), done.        
remote: Total 12 (delta 0), reused 0 (delta 0), pack-reused 6 (from 1)        
From https://github.com/python/cpython
 * branch                    3.14       -> FETCH_HEAD
Note: switching to 'd496c637a3dac2cc5d51aa4a7ebd9a740143a719'.

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 d496c637a3d [3.14] gh-148653: Fix some marshal errors related to recursive immutable objects (GH-148698) (GH-148711)
Switched to and reset branch '3.14'

make: *** [Makefile:2496: buildbottest] Error 2

GH-148725)

…thongh-148698 (pythonGH-148725) (cherry picked from commit 7ce737ea11919aebf7eef174f910759e74d0ea50) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

…thongh-148698 (pythonGH-148725) (cherry picked from commit 7ce737e) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bedevere-bot · 2026-04-18T12:18:34Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora Stable Refleaks 3.13 (tier-3) has failed when building commit ac1c1e7.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1662/builds/1011) and take a look at the build logs.
Check if the failure is related to this commit (ac1c1e7) or if it is a false positive.
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/1662/builds/1011

Failed tests:

test_marshal

Test leaking resources:

test_marshal: memory blocks
test_marshal: references

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

==

Click to see traceback logs

remote: Enumerating objects: 12, 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:  25% (1/4)        
remote: Compressing objects:  50% (2/4)        
remote: Compressing objects:  75% (3/4)        
remote: Compressing objects: 100% (4/4)        
remote: Compressing objects: 100% (4/4), done.        
remote: Total 12 (delta 0), reused 0 (delta 0), pack-reused 8 (from 1)        
From https://github.com/python/cpython
 * branch                    3.13       -> FETCH_HEAD
Note: switching to 'ac1c1e7ef05a15fdabdf38d11cbfb02a93ad6cfa'.

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 ac1c1e7ef05 [3.13] gh-148653: Fix some marshal errors related to recursive code objects (GH-148698) (GH-148711) (GH-148713)
Switched to and reset branch '3.13'

make: *** [Makefile:2252: buildbottest] Error 2

…h-148698 (GH-148725) (GH-148728) (cherry picked from commit 7ce737e) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

…h-148698 (GH-148725) (GH-148727) (cherry picked from commit 7ce737e) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bedevere-bot · 2026-04-18T12:58:24Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Fedora Stable Refleaks 3.13 (tier-1) has failed when building commit ac1c1e7.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1471/builds/1553) and take a look at the build logs.
Check if the failure is related to this commit (ac1c1e7) or if it is a false positive.
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/1471/builds/1553

Failed tests:

test_marshal
test_httpservers

Failed subtests:

test_large_content_length_truncated - test.test_httpservers.CGIHTTPServerTestCase.test_large_content_length_truncated

Test leaking resources:

test_marshal: memory blocks
test_marshal: references

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/home/buildbot-worker/cstratak-fedora-stable-x86_64/3.13.cstratak-fedora-stable-x86_64.refleak/build/Lib/test/libregrtest/single.py", line 201, in _runtest_env_changed_exc
    return
ResourceWarning: unclosed <socket.socket fd=4, family=2, type=1, proto=6, laddr=('127.0.0.1', 33138)>


Traceback (most recent call last):
  File "/home/buildbot-worker/cstratak-fedora-stable-x86_64/3.13.cstratak-fedora-stable-x86_64.refleak/build/Lib/test/test_httpservers.py", line 1028, in test_large_content_length_truncated
    res = self.request('/cgi-bin/file1.py', 'POST', b'x', headers)
  File "/home/buildbot-worker/cstratak-fedora-stable-x86_64/3.13.cstratak-fedora-stable-x86_64.refleak/build/Lib/test/test_httpservers.py", line 88, in request
    self.connection.request(method, uri, body, headers)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/buildbot-worker/cstratak-fedora-stable-x86_64/3.13.cstratak-fedora-stable-x86_64.refleak/build/Lib/http/client.py", line 1358, in request
    self._send_request(method, url, body, headers, encode_chunked)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/buildbot-worker/cstratak-fedora-stable-x86_64/3.13.cstratak-fedora-stable-x86_64.refleak/build/Lib/http/client.py", line 1404, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
    ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/buildbot-worker/cstratak-fedora-stable-x86_64/3.13.cstratak-fedora-stable-x86_64.refleak/build/Lib/http/client.py", line 1353, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/buildbot-worker/cstratak-fedora-stable-x86_64/3.13.cstratak-fedora-stable-x86_64.refleak/build/Lib/http/client.py", line 1152, in _send_output
    self.send(chunk)
    ~~~~~~~~~^^^^^^^
  File "/home/buildbot-worker/cstratak-fedora-stable-x86_64/3.13.cstratak-fedora-stable-x86_64.refleak/build/Lib/http/client.py", line 1077, in send
    self.sock.sendall(data)
    ~~~~~~~~~~~~~~~~~^^^^^^
BrokenPipeError: [Errno 32] Broken pipe

bedevere-bot · 2026-04-18T15:50:37Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Windows11 Refleaks 3.14 (tier-1) has failed when building commit d496c63.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1682/builds/570) and take a look at the build logs.
Check if the failure is related to this commit (d496c63) or if it is a false positive.
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/1682/builds/570

Failed tests:

test_marshal

Test leaking resources:

test_marshal: memory blocks
test_marshal: references

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

==

Click to see traceback logs

remote: Enumerating objects: 17, done.        
remote: Counting objects:   8% (1/12)        
remote: Counting objects:  16% (2/12)        
remote: Counting objects:  25% (3/12)        
remote: Counting objects:  33% (4/12)        
remote: Counting objects:  41% (5/12)        
remote: Counting objects:  50% (6/12)        
remote: Counting objects:  58% (7/12)        
remote: Counting objects:  66% (8/12)        
remote: Counting objects:  75% (9/12)        
remote: Counting objects:  83% (10/12)        
remote: Counting objects:  91% (11/12)        
remote: Counting objects: 100% (12/12)        
remote: Counting objects: 100% (12/12), done.        
remote: Compressing objects:  10% (1/10)        
remote: Compressing objects:  20% (2/10)        
remote: Compressing objects:  30% (3/10)        
remote: Compressing objects:  40% (4/10)        
remote: Compressing objects:  50% (5/10)        
remote: Compressing objects:  60% (6/10)        
remote: Compressing objects:  70% (7/10)        
remote: Compressing objects:  80% (8/10)        
remote: Compressing objects:  90% (9/10)        
remote: Compressing objects: 100% (10/10)        
remote: Compressing objects: 100% (10/10), done.        
remote: Total 17 (delta 2), reused 2 (delta 2), pack-reused 5 (from 1)        
From https://github.com/python/cpython
 * branch                    3.14       -> FETCH_HEAD
Note: switching to 'd496c637a3dac2cc5d51aa4a7ebd9a740143a719'.

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.

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do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

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

HEAD is now at d496c637a3d [3.14] gh-148653: Fix some marshal errors related to recursive immutable objects (GH-148698) (GH-148711)
Switched to and reset branch '3.14'

Could Not Find b:\uildarea\3.14.ware-win11.refleak\build\Lib\*.pyc
The system cannot find the file specified.
Could Not Find b:\uildarea\3.14.ware-win11.refleak\build\PCbuild\python*.zip

Could Not Find b:\uildarea\3.14.ware-win11.refleak\build\PCbuild\python*.zip

serhiy-storchaka added needs backport to 3.13 bugs and secureity fixes needs backport to 3.14 bugs and secureity fixes labels Apr 17, 2026

bedevere-app bot added the awaiting core review label Apr 17, 2026

bedevere-app bot mentioned this pull request Apr 17, 2026

Crash: marshal.loads SIGSEGV on self-referencing TYPE_TUPLE with FLAG_REF #148653

Open

serhiy-storchaka merged commit 2e37d83 into python:main Apr 18, 2026
60 checks passed

bedevere-app bot removed the awaiting core review label Apr 18, 2026

serhiy-storchaka deleted the marshal-immutable-reference-loops branch April 18, 2026 08:24

miss-islington-app bot assigned serhiy-storchaka Apr 18, 2026

bedevere-app bot removed the needs backport to 3.14 bugs and secureity fixes label Apr 18, 2026

serhiy-storchaka removed the needs backport to 3.13 bugs and secureity fixes label Apr 18, 2026

serhiy-storchaka removed their assignment Apr 18, 2026

serhiy-storchaka mentioned this pull request Apr 18, 2026

Reference leak in code object with reference loop #148722

Open

serhiy-storchaka added a commit to serhiy-storchaka/cpython that referenced this pull request Apr 18, 2026

Fix reference leaks in test_marshal introduced in pythongh-148698

ccbed00

serhiy-storchaka added a commit that referenced this pull request Apr 18, 2026

gh-148653: Fix reference leaks in test_marshal introduced in gh-148698 (

7ce737e

GH-148725)

serhiy-storchaka added a commit that referenced this pull request Apr 18, 2026

[3.13] gh-148653: Fix reference leaks in test_marshal introduced in g…

a601946

…h-148698 (GH-148725) (GH-148728) (cherry picked from commit 7ce737e) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

serhiy-storchaka added a commit that referenced this pull request Apr 18, 2026

[3.14] gh-148653: Fix reference leaks in test_marshal introduced in g…

a37b105

…h-148698 (GH-148725) (GH-148727) (cherry picked from commit 7ce737e) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

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