repo stringclasses 1
value | instance_id stringlengths 20 22 | problem_statement stringlengths 126 60.8k | merge_commit stringlengths 40 40 | base_commit stringlengths 40 40 |
|---|---|---|---|---|
python/cpython | python__cpython-134987 | # `test_perf_profiler` fails under Windows Subsystem for Linux
# Bug report
The culprit is that for some reason calling `perf` from the WSL raises a `PermissionError`, rather than `FileNotFoundError` or `CalledProcessError` when `perf` is not available.
Example output:
```
$ which perf # not present
$ ./python -m t... | 6ab842fce50a6125797bcddfc4a4b2622aa6c6a9 | 0d9d48959e050b66cb37a333940ebf4dc2a74e15 |
python/cpython | python__cpython-134979 | # Deprecate support for `string` named-parameter in hash functions constructors
# Feature or enhancement
This is a follow-up to https://github.com/python/cpython/issues/134696. After c6e63d9d351f6d952000ec3bf84b3a7607989f92, it's now possible to use the following forms:
- `hashlib.new(name, data)`
- `hashlib.new(nam... | ee65ebdb50005655d75aca1618d3994a7b7ed869 | ac7511062bf8e16ad489b17990d99abd3b4351f5 |
python/cpython | python__cpython-134977 | # Add notes about `s[i]` in `Common Sequence Operations`
# Documentation
| Operation | Result | Notes |
|-----------|-----------------------------|-------|
| `s[i]` | *i*th item of *s*, origin 0 | (3) |
3. If *i* or *j* is negative, the index is relative to the end of sequence *s*: `len(s) ... | 158e5162bfaa8a49178ce2c3f2455c3e03b60157 | 1cb716387255a7bdab5b580bcf8ac1b6fa32cc41 |
python/cpython | python__cpython-134971 | # argparse: Unexpanded replacements in "unknown action" exception
# Bug report
### Bug description:
https://github.com/python/cpython/blob/ad39f017881e0bd8ffd809755ebf76380b928ad3/Lib/argparse.py#L1536-L1537
There is a missing `f` there, so the replacements don't happen. Noticed accidentally because it broke snakeo... | 965c48056633d3f4b41520c8cd07f0275f00fb4c | cebae977a63f32c3c03d14c040df3cea55b8f585 |
python/cpython | python__cpython-134955 | # test_subprocess can timeout on systems with excessive max file descriptors
# Bug report
### Bug description:
On some systems, `os.sysconf("SC_OPEN_MAX")` may return a very large value (i.e. 2**30), leading to the subprocess test timing out (or run forever).
### CPython versions tested on:
CPython main branch, 3... | f58873e4b2b7aad8e3a08a6188c6eb08d0a3001b | 5507eff19c757a908a2ff29dfe423e35595fda00 |
python/cpython | python__cpython-135010 | # Add set_pledged_input_size to ZstdCompressor
# Feature or enhancement
### Proposal:
pyzstd's ZstdCompressor class had a method `_set_pledged_input_size`, which allowed users to set the amount of data they were going to write into a frame so it would be written into the frame header. We should support this use case... | 4b44b3409ac026e7f13054a3daa18ab7ee14d85c | 3d396ab7591d544ac8bc1fb49615b4e867ca1c83 |
python/cpython | python__cpython-134924 | # Update MSVC PGO options
The linker options we currently use for PGO on Windows are deprecated and should be updated to [`/GENPROFILE`](https://learn.microsoft.com/en-us/cpp/build/reference/genprofile-fastgenprofile-generate-profiling-instrumented-build?view=msvc-170) and [`/USEPROFILE`](https://learn.microsoft.com/e... | 8865b4f95b32097099d252111669b88ec7c1eb7f | 310c8cd5e5dcb0fb9509e08c0d5cf32075416878 |
python/cpython | python__cpython-134919 | # Fix and improve doctest's documentation
When working on #108885 I found several issues in the `doctest` documentation.
* `doctets.failureException` does not exist. The referred exception is `unittest.TestCase.failureException`.
* Several copy-paste and markup errors.
* Example for float formatting is outdated since... | 3c66e5976669a599adfb260514c03815b1a9e4e9 | 68784fed78aa297f0de0d038742495709185bef5 |
python/cpython | python__cpython-134910 | # Crash when calling `textiowrapper_iternext` and writing to a text file simultaneously in ft build
Running this script under free-threading build:
```python
import os
import tempfile
import threading
N=2
COUNT=100
def writer(file, barrier):
barrier.wait()
for _ in range(COUNT):
f.write("x")
def rea... | 44fb7c361cb24dcf9989a7a1cfee4f6aad5c81aa | 055827528fa50c9a7707792f5fe264c4e20c07e9 |
python/cpython | python__cpython-134907 | # Document zstd flag CompressionParameter.content_size_flag
# Documentation
The initial documentation for `compression.zstd` did not document `CompressionParameter.content_size_flag`, as I wanted to audit which scenarios it would take effect under. This issue is to track adding the docs for parameter.
<!-- gh-linke... | 5f60d0fcccbf6676f5bc924f05452bd5321446f0 | 381020d41fb1f8b33421f01c609ba0d0edb99764 |
python/cpython | python__cpython-134892 | # Add `PyUnstable_Unicode_GET_CACHED_HASH`
# Feature or enhancement
### Proposal:
I'd like to add a quick way to maybe get a `str` hash, so that advanced users don't need to reach into the undocumented-but-public `PyASCIIObject->hash`.
```c
Py_hash_t PyUnstable_Unicode_GET_CACHED_HASH(PyObject *str)
```
If the has... | e413e2671916ed8f4513af92830f4fb2bc59b1d2 | 343182853f19a42c0ba8980d3104076a8c7bcfe7 |
python/cpython | python__cpython-134958 | # Python 3.14+: `python: Objects/unicodeobject.c:10387: _PyUnicode_JoinArray: Assertion `res_data == PyUnicode_1BYTE_DATA(res) + kind * PyUnicode_GET_LENGTH(res)' failed.` in sqlglot
# Crash report
### What happened?
The pure Python code in `sqlglot` package manages to trigger an assertion in CPython:
```
python: O... | 6b77af257c25d31f1f137e477cb23e63692ddf29 | e598eecf4c97509acef517e94053e45db51636fb |
python/cpython | python__cpython-134886 | # zstd should use Py_XSETREF
# Bug report
### Bug description:
There is a theoretical crash path in the new zstd module that can be avoided with Py_XSETREF. PR incoming.
### CPython versions tested on:
CPython main branch
### Operating systems tested on:
_No response_
<!-- gh-linked-prs -->
### Linked PRs
* gh-... | 45c6c48afc13f9897010e32171a3e02d0624258c | b367e27af9b52528e395f95b277ec7b69e98e287 |
python/cpython | python__cpython-134897 | # "Virtual" iterators cause odd behavior with sys.monitoring
# Bug report
### Bug description:
Starting with CPython commit f6f4e8a6622d556641799b02aed7ac018d878cdc, the coverage.py test suite fails when using sys.monitoring. A loop seems to execute one time too many:
```
___________________________________________... | ce6a6371a23dc57ed4257eb102ebfb2827477abf | c600310663277e24607890298e6d9bf7e1d4f584 |
python/cpython | python__cpython-134878 | # python -m pdb -p fails when CONFIG_CROSS_MEMORY_ATTACH not set in kernel config
# Bug report
### Bug description:
It's possible that a Linux kernel is built with the kernel config variable `CONFIG_CROSS_MEMORY_ATTACH` not set. (This is the case for the kernel that comes with Flatcar Container Linux and for CoreOS,... | ac9c3431cc5916a795c42b3e2b965233ceffe6f0 | 24069fbca861a5904ee7718469919e84828f22e7 |
python/cpython | python__cpython-134994 | # 3.14.0b2 fails to build with strictly C11 compliant compiler
# Bug report
### Bug description:
With a compiler that implements `atomic_load_explicit` as specified in the C11 standard (such as many older versions of clang), Python 3.14.0b2 fails to build:
```
In file included from Parser/pegen.c:3:
In file included... | b525e31b7fc50e7a498f8b9b16437cb7b9656f6f | 0ac9e17fb47075c9446b99da4dffe4cad993b97a |
python/cpython | python__cpython-134858 | # Improved error reporting for doctests run with unittest
There are several issues with error reports when doctests are wrapped in `DocTestCase`.
* When error happens during compilation or execution an example, the traceback contains several lines from `doctest.py`:
File ...
exec(compile(exampl... | cb8a72b301f47e76d93a7fe5b259e9a5758792e1 | dafd14146f7ca18932894ea445a2f9f98f2a8b01 |
python/cpython | python__cpython-134849 | # audit_events Sphinx extension appends to 'sources' list infinitely
# Bug report
My Sphinx builds are taking a long time after a bunch of runs.
With @AA-Turner we tracked it down to the AuditEvents extension appending new values in each run to a list that's persisted in the environment pickle.
Adam, over to you :)
... | b265a7ddeb12b2040d80b471d447ce4c3ff4bb95 | 4635115c3f1495fa20e553937df37861fffa7054 |
python/cpython | python__cpython-134844 | # Update the outdated list of HTTP status codes in the docs
# Documentation
In recent years, more missing HTTP status codes have been gradually added to https://github.com/python/cpython/blob/main/Lib%2Fhttp%2F__init__.py#L54, such as https://github.com/python/cpython/commit/61ac612e78e4f2625977406fb6f366e0a644673a, ... | 3704171415c1ea6ebbeb2f992758b6565f42e378 | f58873e4b2b7aad8e3a08a6188c6eb08d0a3001b |
python/cpython | python__cpython-134834 | # Detail `del s[i:j]` in `Mutable Sequence Types`
# Documentation
In [Mutable Sequence Types](https://docs.python.org/3.15/library/stdtypes.html#mutable-sequence-types):
The description of `del s[i:j]` is "same as s[i:j] = []". This is not clear enough.
We should make it consistent with `del s[i:j:k]` ("removes the ... | 609d5adc7cc241da8fe314a64ddd2c8a883ee8b7 | 46707d241a9eef4713450fa3ccbe490e48c8b722 |
python/cpython | python__cpython-134818 | # Document `RotatingFileHandler.shouldRollover()` and `TimedRotatingFileHandler.shouldRollover()`
# Documentation
The [RotatingFileHandler](https://docs.python.org/3/library/logging.handlers.html#timedrotatingfilehandler) and [TimedRotatingFileHandler](https://docs.python.org/3/library/logging.handlers.html#timedrota... | 7be5916f6dc3db95744b5fec945327d82cce0183 | d7256ae4d781932b3b43b162e8425abdb134afa6 |
python/cpython | python__cpython-134772 | # `time_clockid_converter()` selects the wrong type for clockid_t on Cygwin.
# Bug report
### Bug description:
Building Python from the main branch on Python fails with the following error:
```sh
gcc -fno-strict-overflow -Wsign-compare -DNDEBUG -g -O3 -Wall -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-fi... | d96343679fd6137c9d87d1bb120228b162ea0f8c | f49a07b531543dd8a42d90f5b1c89c0312fbf806 |
python/cpython | python__cpython-134769 | # Build failure on main and latest Python 3.14 beta (missing mt_continue_should_break)
# Bug report
### Bug description:
The `3.14` branch and `main` both fail to build with `--enable-assertions`:
```console
$ ./configure --with-assertions
$ make
[...]
gcc -fno-strict-overflow -Wsign-compare -g -O3 -Wall -std=c1... | 2f2bee21118adce653ee5bc4eb31d30327465966 | 5f60d0fcccbf6676f5bc924f05452bd5321446f0 |
python/cpython | python__cpython-136071 | # `UnboundLocalError` in `email.message.Message.get_payload`
# Bug report
### Bug description:
```python
html_body = part.get_payload(decode=True).decode()
File "/usr/local/lib/python3.8/email/message.py", line 282, in get_payload
return quopri.decodestring(bpayload)
```
### CPython versions tested on:
... | 25335d297b5248922a4c82183bcdf0c0ada8352b | 5a20e7972505c6953e7c7f434f42d62cab3795f3 |
python/cpython | python__cpython-134747 | # Change PyThread_allocate_lock() implementation to PyMutex
# Feature or enhancement
### Proposal:
`PyMutex` is a fast and portable lock implementation. I propose to change the `PyThread_allocate_lock()` implementation to reuse `PyMutex`.
### Has this already been discussed elsewhere?
No response given
### Links ... | ebf6d13567287d04683dab36f52cde7a3c9915e7 | 45c6c48afc13f9897010e32171a3e02d0624258c |
python/cpython | python__cpython-134748 | # Abort in `_PyEval_EvalFrameDefault` originating on calling `fcntl.ioctl`
# Crash report
### What happened?
There are two ways to get aborts starting from `fcntl.ioctl`: one happens in `_PyEval_EvalFrameDefault`, the other results in a `Fatal Python error`. Not sure this is a single issue, so reporting both ways.
... | 9300a596d37d058e6e58d00a2ad70617c863a3de | 176b059fa03b3d6abd58c6711bb24111f2245706 |
python/cpython | python__cpython-134926 | # `ast.dump()` elision of empty values should use field types
# Bug report
### Bug description:
In 3.13 we changed `ast.dump()` to not show empty values (`None` or the empty list) by default. However, this is based purely on the value of individual attributes:
```
>>> ast.dump(ast.Name(id="x"))
"Name(id='x', ctx=Lo... | cc344e8dd0a6fdc83a032c229f9b3cf53f76a887 | ce6a6371a23dc57ed4257eb102ebfb2827477abf |
python/cpython | python__cpython-134713 | # Clinic signatures of HACL* hash functions are inconsistent with OpenSSL implementation
### Bug description:
According to its [docstring](https://github.com/python/cpython/blob/cf8941c60356acdd00055e5583a2d64761c34af4/Modules/clinic/_hashopenssl.c.h#L165), the function `hashlib.shake_128(...).hexdigest()` should acc... | c6e63d9d351f6d952000ec3bf84b3a7607989f92 | 4d31d19a1df0a6e658e6a320cde8355f5f6ea27b |
python/cpython | python__cpython-134694 | # `‘address_of_code_object’ may be used uninitialized in this function [-Wmaybe-uninitialized]` warning in `_remote_debugging_module.c`
<img width="994" alt="Image" src="https://github.com/user-attachments/assets/24d8a1f4-2b8d-40eb-abe5-a274fdfc0c3c" />
See https://github.com/python/cpython/blob/cf8941c60356acdd00055... | 806107d7a2fa9baa76d4025f46fab2c8725963f4 | f2ce4bbdfdfa2b658fbeef66f414be2ecf7981dd |
python/cpython | python__cpython-134811 | # Assertion failed: Python/qsbr.c in _Py_qsbr_poll
# Crash report
Seen in https://github.com/python/cpython/actions/runs/15239974615/job/42858835898
```
0:07:45 load avg: 8.75 [57/60/1] test_free_threading worker non-zero exit code (Exit code -6 (SIGABRT)) -- running (2): test_socket (1 min 55 sec), test_threading (... | a4d37f88b66bc9a66b2ab277aa66a2a6b20821fa | 967f361993c9c97eb3ff3076a409b78ea32938df |
python/cpython | python__cpython-134734 | # tokenize._all_string_prefixes does not list t-string prefixes
# Bug report
### Bug description:
`tokenize._all_string_prefixes()` does not include t-string prefixes.
```python
$ ./python.bat
Running Release|x64 interpreter...
Python 3.15.0a0 (heads/main-dirty:7b1a7002312, May 25 2025, 22:44:32) [MSC v.1929 64 bit... | 08c78e02fab4a1c9c075637422d621f9c740959a | c60f39ada625562bff26400f304690c19fe9f504 |
python/cpython | python__cpython-134750 | # asyncio.start_unix_server() cleanup_socket defaulting to true in 3.13 is not documented
# Documentation
In 3.13 a feature where unix sockets are automatically cleaned up was added in asyncio. It was seen as a compatibility break but was recent enough that we could not do anything specifically about it at the time. ... | 92ea1eb38ff97ac046a0031d505c30a51f58a43f | 9bf03c6c30c9ee2979061410651c3f6132683640 |
python/cpython | python__cpython-134665 | # asyncio has underscored names in its `__all__`
# Bug report
### Bug description:
asyncio has several names in its `__all__` that start with an underscore.
```
Python 3.15.0a0 (heads/assignannos:9081715ff82, May 25 2025, 08:33:06) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "... | 797abd1f7fdeb744bf9f683ef844e7279aad3d72 | f1dcf3c7bf90961b8d5475154d3f28cfef0a054f |
python/cpython | python__cpython-134702 | # 3.14t vs 3.13t cuts IOCP performance in half
# Bug report
### Bug description:
This is about 3.14.0bl vs 3.13.1, free threaded in both cases.
Microsoft Windows [Version 10.0.19045.4529]
I run and maintain an IOCP server in python 3.13.1t.
There are no 3rd party libraries being used.
The Problem: Using the exact ... | 3c0525126ef95efe2f578e93db09f3282e3ca08f | 56743afe879ca8fc061a852c5c1a311ff590bba1 |
python/cpython | python__cpython-134650 | # Export `zlib.{adler,crc}32_combine`
# Feature or enhancement
### Proposal:
This is already provided by zlib, and is useful for computing a crc32 in multiple chunks (not linearly).
What I currently do is use ctypes, but that doesn't work on all environments (like Windows). I don't think we'll need a pure python f... | 737b4ba020ecaf4b30d5a4c8f99882ce0001ddd6 | 8704d6b39139d2b1c3dd871590188fb7deb8aaad |
python/cpython | python__cpython-134633 | # PEP 739 / `build-details.json`: `c_api.headers` does not include the `pythonX.Y` directory
# Bug report
### Bug description:
Sorry I didn't notice this while fixing #134455 but `c_api.headers` key contains the path to top-level system include directory, i.e.:
```json
{
"c_api": {
"headers": "/usr/local/incl... | 0d582def34babca7417ece8a9e4e16cc2a752d44 | c51f241c97c5bcc8ae6830842db5b00f76d6a592 |
python/cpython | python__cpython-134598 | # Update HOWTO to reflect change in CIBW option
# Documentation
Python documentation in [Doc/howto/free-threading-extensions.rst](https://github.com/python/cpython/blob/main/Doc/howto/free-threading-extensions.rst?plain=1) states at lines 397-399
> [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel) supports ... | 7b1010a57db9405f277139abef4016ba987b75fc | 80284b5c5eebd0e603c38322f94a97a2853ceeba |
python/cpython | python__cpython-134624 | # Add `__attribute__((noreturn,cold))` for `_mi_assert_fail`
# Feature or enhancement
> [!NOTE]
> I already have a PR ready in case this is accepted
### Proposal:
Because `_mi_assert_fail` is not marked as a `noreturn` function, the assertion is not understood by CLion and I have some false positives telling me "th... | c600310663277e24607890298e6d9bf7e1d4f584 | ebf6d13567287d04683dab36f52cde7a3c9915e7 |
python/cpython | python__cpython-134765 | # The devcontainer doesn't include the bits to build the _zstd module
# Bug report
### Bug description:
A direct build in the devcontainer:
```shell
...
Written build/lib.linux-aarch64-3.15/_sysconfigdata_d_linux_aarch64-linux-gnu.py
Written build/lib.linux-aarch64-3.15/_sysconfig_vars_d_linux_aarch64-linux-gnu.jso... | 9bf03c6c30c9ee2979061410651c3f6132683640 | 96905bdd273d2e5724d2c1b6b0f95ecb0daeaabe |
python/cpython | python__cpython-134603 | # untokenize() round-trip fails for t-strings (with only type + string)
# Bug report
### Bug description:
Found when investigating [test.test_tokenize.TestRoundtrip.test_random_files](https://github.com/python/cpython/actions/runs/15209215387/job/42779254060?pr=134577#step:22:490) failing on #134577
```python
def ... | 52509cc94b1a18cb325dbfa7e5f830b32759a903 | 3e562b394252ff75d9809b7940020a775e4df68b |
python/cpython | python__cpython-134581 | # Modernizing `difflib.HtmlDiff` for HTML Output
# Feature or enhancement
### Proposal:
Previously, I added dark mode support to the HTML export feature of `difflib`, and during that process, I uncovered several issues.
By opening the browser's developer tools (F12) and inspecting the generated HTML, you can observ... | 7ca6d79fa32d7203ee8d64f47b6b3539a027fdea | a4d37f88b66bc9a66b2ab277aa66a2a6b20821fa |
python/cpython | python__cpython-134579 | # Mark more slow tests
I noticed that `test_capi` "freezes" even when ran with `-u-cpu`. So I measured durations of all tests again and found yet few slow tests. They should be marked as requiring the `cpu` resource.
<!-- gh-linked-prs -->
### Linked PRs
* gh-134579
* gh-134590
* gh-134592
<!-- /gh-linked-prs -->
| 77eade39f972a4f3d8e9fec00288779f35ceee21 | fc0c9c24121c1a62b25b79062286f976699b59e9 |
python/cpython | python__cpython-134570 | # Expose log format to users in assertLogs
# Feature or enhancement
### Proposal:
## Use-case
Someone works in an organisation with a custom log formatter. They want to make assertions about logs in a particular test and would like the assertions to match the format used in the org. Currently the format is static i... | 51ab66b3d519d3802430b3a31a135d2670e37408 | b19c9da401b9e81078103861f55e0762b93453f0 |
python/cpython | python__cpython-134566 | # unittest.doModuleCleanups() swallows all but first exception
# Feature or enhancement
Currently, `unittest.doModuleCleanups()` swallows all but first exception raised in the cleanup code. With ExceptionGroup we can handle multiple exceptions.
<!-- gh-linked-prs -->
### Linked PRs
* gh-134566
<!-- /gh-linked-prs --... | 393773ae8763202ecf7afff81c4d57bd37c62ff6 | 77eade39f972a4f3d8e9fec00288779f35ceee21 |
python/cpython | python__cpython-134599 | # Refleaks on free-threaded builds
# Bug report
### Bug description:
The nogil refleak buildbots have started failing for main and 3.14 with leaks in `test_sys`, `test_capi` and a few others.
See e.g. https://buildbot.python.org/#/builders/1714/builds/90
I bisected this to 09e72cf091d03479eddcb3c4526f5c6af56d31a0... | 56743afe879ca8fc061a852c5c1a311ff590bba1 | 08c78e02fab4a1c9c075637422d621f9c740959a |
python/cpython | python__cpython-134552 | # `-m pdb -p` -- other side cannot read debug script due to too-strict permissions
# Bug report
### Bug description:
1. run `python3.14`
2. find its pid
3. `sudo python3.14 -m pdb -p $pid`
the `pdb` tab will hang, the other side will display similar to:
```
Python 3.14.0b1 (main, May 8 2025, 08:57:13) [GCC 13.3.... | 74a9c60f3ee2195e506144c3811090f1334c996b | 47f1161d3a2bec52b5b5e952150141709c247da2 |
python/cpython | python__cpython-135540 | # shutil.rmtree - link to example for windows readonly file handling in function docs
# Documentation
The python docs for the `shutil` module include an example of how to use `rmtree` on a windows folder that contains read-only files:
https://docs.python.org/3/library/shutil.html#rmtree-example
However, there is no... | e9b647dd30d22cef465972d898a34c4b1bb6615d | 17ac3933c3c860e08f7963cf270116a39a063be7 |
python/cpython | python__cpython-134487 | # _ctypes fails to import on NetBSD due to a missing `alloca` symbol
# Bug report
### Bug description:
After running `./configure && gmake` on a NetBSD 10 machine, the build finishes with the following warning:
```sh
Written build/lib.netbsd-10.0-evbarm-3.15/_sysconfigdata__netbsd10_.py
Written build/lib.netbsd-10.... | b8f55266bf873bc101c3aab7aa868b909ecbcb99 | 99a9ab1c64dce26c0f2dce7621b4d7f75da69856 |
python/cpython | python__cpython-134456 | # PEP 739 / `build-details.json`: `c_api.include` is used instead of `c_api.headers`
# Bug report
### Bug description:
[PEP 739](https://peps.python.org/pep-0739/) specifies that the CPython header directory is included in the [`c_api.headers` key](https://peps.python.org/pep-0739/#c-api-headers). However, it seems ... | d706eb9e0f99924b628da4a8afe8e23cff8b801b | 458e33018a2f4f4b3d9a2c8f6e70dcce31f34005 |
python/cpython | python__cpython-134513 | # Using a frozen attributes to Exception class
# Bug report
### Bug description:
`CycleFoundException` in asyncio has frozen attributes, which has a problem related https://github.com/python/cpython/issues/99856
https://github.com/python/cpython/blob/e1f891414b2329414a6160ed246f5f869a218bfd/Lib/asyncio/tools.py#L16... | f9324cb3cb4d9bb9f0aef2e48b8afa895bde4b0d | 5804ee7b467d86131be3ff7d569443efb0d0f9fd |
python/cpython | python__cpython-134608 | # Error in Format Specification Mini-Language concerning `precision_with_grouping` in 3.14
# Documentation
On this page: https://docs.python.org/3.14/library/string.html#grammar-token-format-spec-format_spec
```py
format_spec: [options][width_and_precision][type]
options: [[fill]align][si... | 7828d52680907d1661ff6993e540f7026461c390 | ee65ebdb50005655d75aca1618d3994a7b7ed869 |
python/cpython | python__cpython-134415 | # `Python/instrumentation.c`: ensure non-NULL `PyLong_FromLong` results when possible
https://github.com/python/cpython/blob/c740fe3bd092911d9e474bcc0eed2a009482be9f/Python/instrumentation.c#L2566
Since PyLong_FromLong can return NULL, it is necessary to use Py_XDECREF, as stated in refcount.h.
https://github.com/p... | cf19b6435d02dd7be11b84a44f4a8a9f1a935b15 | 1e672935b44e084439527507a865b94a4c1315c3 |
python/cpython | python__cpython-134514 | # Not able to start an instantiated Thread in a child process through multiprocessing.Process in python 3.13
# Bug report
### Bug description:
I'm experiencing an issue specifically in python 3.13 regarding Threads in the context of multiprocessing.
The following code is working in python < 3.13
```python
from multi... | 9a2346df861f26d5f8d054ad2f9c37134dee3822 | 05a19b5e56894fd1e63aff6b38fb23ad7c7b3047 |
python/cpython | python__cpython-134371 | # `logging.Formatter` docstring missing processName attribute.
# Documentation
The docstring for `logging.Formatter` class is missing the `processName` attribute that is available in `LogRecord` and documented in the official Python documentation.
## Issues
The `processName` attribute is documented in the [LogRecor... | c740fe3bd092911d9e474bcc0eed2a009482be9f | 1298511b41ec0f9be925c12f3830e94fe8f7e7dc |
python/cpython | python__cpython-134368 | # The new `threading.RLock.locked()` method fails
# Bug report
### Bug description:
```python
import threading
def main():
r = threading.RLock()
print(f"{r = }")
t = threading.Thread(target=r.acquire)
t.start()
t.join()
print(f"{r = }")
print(f"{r.locked() = } at {hex(id(r))}")
if __nam... | 3effede97cc13fc0c5ab5dcde26cc319f388e84c | bd4046f4f869039a1a2ebe2d1d18bfbc2a2951b6 |
python/cpython | python__cpython-134389 | # `repr` of `threading.RLock` is erronous with the `_thread` module
# Bug report
### Bug description:
```python
import threading
r = threading.RLock()
print(f"{r = }")
```
output is:
```
r = <unlocked _thread.RLock object owner=0 count=1 at 0x105a98720>
```
The `threading.RLock.__repr__` seems to me erronous bec... | fade146cfb1616ad7b3b918bedb86756dedf79e6 | 4a4ac3ab4d2a34af99af9e948be9cd1257ed4186 |
python/cpython | python__cpython-134310 | # CI testing for pull requests can fail if multiple workloads exist with the same name
# Bug report
### Bug description:
If more than one PR is opened from branches with the same name, CI testing fails due to mandatory tests being canceled. This is due to the way concurrency groups are named; there is a PR coming wi... | 979d81a17905e922d32fb1671f9ed394e0ffbda6 | 296a66051ede5cc112ca38d17304e518ffb02e23 |
python/cpython | python__cpython-134284 | # Use borrowed references for `LOAD_CONST`
# Feature or enhancement
### Proposal:
We now support borrowed (tagged) references on the stack. Like `LOAD_FAST_BORROW` we can use borrowed references in `LOAD_CONST` as the value in the constants array is guaranteed to outlive any variables in the frame.
### Has this al... | 6dcb0fdfe0a2de083f0f1f9a568dd0a19541b863 | f695eca60cfc53cf3322323082652037d6d0cfef |
python/cpython | python__cpython-134982 | # `~bool` deprecation not reported for literals
# Bug report
### Bug description:
Related to: https://github.com/python/cpython/pull/103487
```py
# literal.py
print(~False)
print(~True)
# var.py
a = True
print(~a)
b = False
print(~b)
```
A DeprecationWarning is reported for `var.py`, but not for `literal.py`.
`... | 86c3316183a79867e3c666d0830f897e16f0f339 | e0d6500b2d9a08beb7b607b846d1eeaa26706667 |
python/cpython | python__cpython-134263 | # Add retries to downloads of Windows dependencies
`generate_sbom.py` downloads sources to verify their hashes. Sometimes these downloads flake, like in https://github.com/python/cpython/actions/runs/15118338626/job/42494602073?pr=134253
I've made a PR to add retries with exponential backoff:
<!-- gh-linked-prs -->
... | 0c5a8b0b55238a45b9073d06a10c3a59568cdf3c | b8998fe2d8249565bf30ce6075ed678e1643f2a4 |
python/cpython | python__cpython-134871 | # Python 3.15.0: test_sys.test_getallocatedblocks() fails if run after test_collections.test_odd_sizes()
# Bug report
### Bug description:
test_sys fails while running the test suite of python 3.15.0 when --with-pydebug and --enable-optimizations are both enabled.
I get consistent failure of the test suite, but wh... | 54ca55978e305ebb099d1b49633211597625bd52 | 3612d8f51741b11f36f8fb0494d79086bac9390a |
python/cpython | python__cpython-134237 | # `Tests / Check if generated files are up to date` fails since recent commits
# Bug report
Link: https://github.com/python/cpython/actions/runs/15115778970/job/42485985691?pr=134230
Output:
```diff
diff --git a/Include/internal/pycore_opcode_metadata.h b/Include/internal/pycore_opcode_metadata.h
index 7185947..178... | a36ce264a9b6b0a18b78d3b0d79d2b11a685b801 | c45e661226558e997e265cf53ce1419213cc10b7 |
python/cpython | python__cpython-134277 | # PyREPL: autocomplete built-in modules
# Feature or enhancement
### Proposal:
Currently, built-in modules (i.e. `sys`) are not autocompleted in the new REPL. For instance, typing `import sy<tab>` does not offer `sys` as a completion possibility.
This is because we use `pkgutil.iter_modules` under the hood. Since b... | 8421b03b16a4852a527256cb7cdce2ab2d318548 | 470941782f74288823b445120f6383914b659f23 |
python/cpython | python__cpython-134267 | # PyREPL: Do not show underscored modules by default during autocompletion
# Feature or enhancement
### Proposal:
Attribute autocomplete in the new REPL does not show underscored names unless specifically asked for:
```python
>>> class Foo:
... _foo = 2
... foo = 3
...
>>> Foo.<tab>
Foo.foo Foo.mro()... | a3a3cf6d157948ed64ae837d6310b933a39a2493 | c91ad5da9d92eac4718e4da8d53689c3cc24535e |
python/cpython | python__cpython-134223 | # Incorrect test in `test_pyrepl`
# Bug report
### Bug description:
In this test:
https://github.com/python/cpython/blob/605022aeb69ae19cae1c020a6993ab5c433ce907/Lib/test/test_pyrepl/test_pyrepl.py#L1051-L1063
The second and third assert is not rerunning the `ImportParser` so it's not actually testing anything rig... | faebf87b3716f7103ee5410456972db36f4b3ada | cc9add695da42defc72e62c5d5389621dac54b2b |
python/cpython | python__cpython-134326 | # `_curses.window.getch` does not check for interruption signals as `_curses.window.{getkey,get_wch}` do
# Bug report
### Bug description:
In `_curses.window.{getkey,get_wch}`, we are checking for possible interrupting signals and say:
> In no-delay mode, an exception is raised if there is no input
However, in `ge... | 51762b6cadb8f316dd783716bc5c168c2e2d07f0 | 579686d9fb1bccc74c694d569f0a8bf28d9ca85a |
python/cpython | python__cpython-134283 | # Possible loss of large text data in `_curses.window.{instr,getstr}`
# Bug report
### Bug description:
`_curses.window.instr` is meant to extract a string of characters between two positions and we have a maximum number of allowed characters which is 1023. However, this limit is *not* enforced, namely we do the fol... | aadda87b3d3d99cb9e8c8791bb9715a3f0209195 | a3a3cf6d157948ed64ae837d6310b933a39a2493 |
python/cpython | python__cpython-134325 | # Argument Clinic dead code in `_cursesmodule.c`
# Bug report
### Bug description:
There are some occurrences of `/*[-clinic input]`, such as
- `_curses.window.chgat`
- `_curses.window.getstr`
- `_curses.window.instr`
In particular, those are misleading as one could assume that it's being handled by clinic but it... | 29e81159644cf78d958e30aaef208e22a04a8b25 | fb09db1b934a51e52e46dc64d7e5e84fe69e6160 |
python/cpython | python__cpython-134288 | # Document base85 and Ascii85 in the base64 module
In the `base64` standard library module, the functions relating to base64, base32, and base16 encoding and decoding are well documented: the documentation links to [RFC 4648](https://datatracker.ietf.org/doc/html/rfc4648.html), which lays out those formats in the usua... | 66aaad61037785639aec393be7618cb54b1372dc | 46d7c114d8cd25e5135bcdf2ea799eea43a41a67 |
python/cpython | python__cpython-134174 | # concurrent.futures→asyncio state transfer is a bottleneck
# Bug report
### Bug description:
The current `_copy_future_state` implementation requires multiple method calls and lock acquisitions to retrieve the source future's state:
1. `done()` - acquires lock to check state
2. `cancelled()` - acquires lock again
... | 53da1e8c8ccbe3161ebc42e8b8b7ebd1ab70e05b | f2de1e6861c27bd498f598efc01600450979b5f9 |
python/cpython | python__cpython-134183 | # Add colorization of exceptions in default `sys.unraisablehook`
# Bug report
### Bug description:
There are no colored exceptions in atexit module. Like this:
```python
import atexit
def foo():
raise Exception('foo')
atexit.register(foo)
```
```
Exception ignored in atexit callback <function foo at 0x00000114C7... | e8251dc0ae6a85f6a0e427ae64fb0fe847eb3cf8 | 8943bb722f2f88a95ea6c5ee36bb5d540740d792 |
python/cpython | python__cpython-134169 | # http.server with HTTPS fails to bind IPv6 addresses
# Bug report
### Bug description:
When HTTPS is enabled, the command-line interface of `http.server` can't bind IPv6 addresses correctly and the `--directory` flag doesn't work.
### bind IPv6
HTTPS server throw an exception when I was trying to bind a IPv6 addre... | 2fd09b011031f3c00c342b44e02e2817010e507c | 5d9c8fe3f6168785cb608dddd3010042f39bb226 |
python/cpython | python__cpython-134159 | # PyREPL doesn't correctly color double braces in f-strings / t-strings
# Bug report
### Bug description:
Syntax highlighting in PyREPL (added in https://github.com/python/cpython/issues/131507) does not correctly color the double-braces used for escaping braces in f-strings or t-strings:
![Image](https://github.co... | 71ea6a6798c5853ed33188865a73b044ede8aba8 | b22460c44d1bc597c96d4a3d27ad8373d7952820 |
python/cpython | python__cpython-134194 | # `AttributeError` in `email._header_value_parser.get_address`
# Bug report
### Bug description:
During fuzzing of Python standard libraries, the following code snippet causes an `AttributeError` with the following message: `AttributeError: 'InvalidHeaderDefect' object has no attribute 'all_defects'`. This occurs in... | d9cad074d52fe31327429fd81e4d2eeea3dbe35b | 1b55e12766d007aea9fcd0966e29ce220b67d28e |
python/cpython | python__cpython-134194 | # `UnboundLocalError` in `email._header_value_parser.parse_message_id`
During fuzzing of Python standard libraries, the following code snippet causes an `UnboundLocalError` with the following message: `UnboundLocalError: cannot access local variable 'pos' where it is not associated with a value'`. This occurs in the `... | d9cad074d52fe31327429fd81e4d2eeea3dbe35b | 1b55e12766d007aea9fcd0966e29ce220b67d28e |
python/cpython | python__cpython-134687 | # `TypeError: '<' not supported between instances of 'NoneType' and 'int'` raised during call to `email.message_from_file`
# Bug report
### Bug description:
During fuzzing of Python standard libraries, the following code snippet causes a TypeError with the following message: `TypeError: '<' not supported between ins... | bcb6b45cb86a2f9f65b6c41f27c36059ba86a50b | d610f11d21241d353b25843f66e51098a5c0ddad |
python/cpython | python__cpython-134154 | # The `json` module page uses "object" confusingly
# Documentation
On the json module page, the word "object" can mean two things: a Python object (any Python value) or a JSON object (a thing enclosed in curly braces). That ambiguity could be explained at the top of the page, and then we could clarify the uses of th... | fa4e088668d4a41f9be5babe7edd5409290ee92a | 009e7b36981fd07f7cca1fdcfcf172ce1584fac7 |
python/cpython | python__cpython-134145 | # Cannot safely Py_EndInterpreter in 3.14b1
# Crash report
### What happened?
Stack trace:
```
#0 tstate_delete_common.constprop.0 (tstate=tstate@entry=0x555555666ca0, release_gil=0) at ../Python/pystate.c:1854
#1 0x00007ffff78cd341 in zapthreads (interp=0x7ffff74c8010) at ../Python/pystate.c:1915
#2 PyInterprete... | f2de1e6861c27bd498f598efc01600450979b5f9 | 0a160bf14c4848f50539e52e2de486c641d122a2 |
python/cpython | python__cpython-134120 | # Segfault from template string iterator
# Crash report
### What happened?
It's possible to segfault the interpreter by repeatedly calling `next()` on an exhausted template string iterator:
```python
template_iter = iter(t"{1}")
next(template_iter)
try:
next(template_iter)
except StopIteration:
pass
next(te... | fc7f4c36664314393bd4c30355e21bd7aeac524d | 84914ad0e5f96f0ca7238f3b4bc7fc4e50b1abb3 |
python/cpython | python__cpython-134118 | # Confusion with "immutable" and "hashable" in Design and History FAQ
The page https://docs.python.org/3/faq/design.html#why-are-there-separate-tuple-and-list-data-types says at the end of its last paragraph:
> Only **immutable** elements can be used as **dictionary keys.**..
Which is not quite correct, since dictio... | b1c33294ca5ef8d889f2ec87f9a8fa79741f9f7d | 53da1e8c8ccbe3161ebc42e8b8b7ebd1ab70e05b |
python/cpython | python__cpython-134110 | # Comments incorrectly shown in pydoc output for argparse
# Bug report
`pydoc` incorrectly shows some comments for `argparse`:
```
| format_help(self)
| # =======================
| # Help-formatting methods
| # =======================
|
| start_section(self, heading)
... | 71cf4dd622832848cace358a7f8444243afd2e83 | ea2d707bd59963bd4f53407108026930ff12ae56 |
python/cpython | python__cpython-134117 | # Use-After-Free in `PyImport_ImportModuleLevelObject`
# Bug report
### Bug description:
If you try to import something with a level >= 1 and it somehow fails to put it into sys.modules after importing, you'll get a nice error message letting you know.
https://github.com/python/cpython/blob/d94b1e9cac82143048031530... | 4e9005d32ff466925f40af410f2ea6bf2329bcf8 | fa4e088668d4a41f9be5babe7edd5409290ee92a |
python/cpython | python__cpython-134099 | # SimpleHTTPRequestHandler incorrectly handles trailing escaped slash
# Bug report
For path to directory which does not end with slash ("/"), SimpleHTTPRequestHandler returns status MOVED_PERMANENTLY with redirection to new path that ends with slash. Slashes can be percent-encoded, although this is not necessary. But... | 2f1ecb3bc474a5895dce090cca7b8afe7b560040 | fcaf009907fc39d604907315155c1f1de811dd88 |
python/cpython | python__cpython-134136 | # `-X showrefcount` doesn't do per-statement reports in new REPL
# Bug report
### Bug description:
`-X showrefcount` [should](https://docs.python.org/3/using/cmdline.html#cmdoption-X) “output the total reference count and number of used memory blocks [...] after each statement in the interactive interpreter. This o... | c31547a5914db93b8b38c6a5261ef716255f3582 | 44b73d3cd4466e148460883acf4494124eae8c91 |
python/cpython | python__cpython-134178 | # Remove C variadic constructor signature support for `threading.RLock`
# Feature or enhancement
Passing any arguments has been deprecated since Python 3.14, as the Python version does not permit any arguments, but the C version allows any number of positional or keyword arguments, ignoring every argument.
<!-- gh-... | d6dc33ed8086fbd79f6adaeac4e329f29a13f834 | 9983c7d4416cac8deb2fded1ec9c7daf786c3a02 |
python/cpython | python__cpython-134027 | # Unable to build if the target macOS version is <10.9
# Bug report
### Bug description:
There is an error building the [`main`](https://github.com/python/cpython/tree/main) branch on macOS when targeting versions <10.9 or using outdated SDKs:
```
/usr/bin/clang -std=gnu11 -c -I./Modules/_hacl -I./Modules/_hacl/inc... | 1566c34dc76ec6139e6827fbab6d76e084a63d9d | 7a504b3d5da98874536834481539c19ba4a265af |
python/cpython | python__cpython-134067 | # Segfault calling `sys.remote_exec(0, None)`
# Crash report
### What happened?
The following code segfaults ASAN builds and aborts/segfaults on non-ASAN debug builds on main:
```python
import sys
sys.remote_exec(0, None)
```
Backtrace ASAN debug free-threading:
```shell
Program received signal SIGSEGV, Segmentat... | 009e7b36981fd07f7cca1fdcfcf172ce1584fac7 | fc7f4c36664314393bd4c30355e21bd7aeac524d |
python/cpython | python__cpython-134063 | # Excessive hash collisions in IPv4Network and IPv6Network classes
# Bug report
### Bug description:
While working with `IPv4Network` objects, @cakekoa and I discovered that hash collisions were common. Below is a small script that shows a few examples of different networks that have hash collisions.
```python
fro... | f3fc0c16e08b317cb201cf1073e934e6909f1251 | 518c95b5529ed3379b5a3065b09f71411efe72fb |
python/cpython | python__cpython-134044 | # use stackrefs in `_PyObject_GetMethod` and calling APIs
# Feature or enhancement
Currently the calling APIs such as `PyObject_VectorcallMethod` use `_PyObject_GetMethod` to avoid creating a bound method object, however `_PyObject_GetMethod` increfs and decrefs the object even when the underlying object supports def... | a380d578737be1cd51e1d1be2b83bbc0b0619e7e | 3f9eb55e090a8de80503e565f508f341c5f4c8da |
python/cpython | python__cpython-134042 | # Some of the newly added path apis in _winapi aren't available on all win api partitions
# Bug report
### Bug description:
The following apis are missing in some win api partitions (mostly gaming or mobile):
- GetLongPathNameW
- GetShortPathNameW
- NeedCurrentDirectoryForExePathW
### CPython versions tested on:
3... | 1c4b34c6cb851334c813647a2a7db77ecee20b7a | 43410953c26153b48554218cbe35ba5f1167b08e |
python/cpython | python__cpython-134077 | # Improve `raise from ValueError()` error message
# Feature or enhancement
https://github.com/python/cpython/issues/133999 gave me an idea. Right now it is:
<img width="788" alt="Image" src="https://github.com/user-attachments/assets/59cf42f5-3f51-495f-ac49-7dc6baab401f" />
I suggest making it something similar to:... | 0d9ccc87a2198a0c1881ab4b17a24fc7fec62418 | a7d41e8aab5211f4ed7f636c41d63adcab0affba |
python/cpython | python__cpython-134034 | # Replace "starred_list" with standard grammar term "expression_list" in for statement documentation
# Documentation
In the [compound statements docs](https://docs.python.org/3/reference/compound_stmts.html#the-for-statement), section 8.3 i found:
> for_stmt ::= "for" [target_list](https://docs.python.org/3/reference... | 4eacf3883dd041c31133ea407204b797a17559b1 | c7364f79b2fb01c251e22115875a46a2ec134dcd |
python/cpython | python__cpython-134365 | # Expose `PyMutex_IsLocked` in the public C API
# Feature or enhancement
### Proposal:
In my C extension, I wanted to write:
```
assert(PyMutex_IsLocked(&mutex));
```
to verify that my own code is maintaining its own locking invariants.
`PyMutex_IsLocked` exists, but is private:
https://github.com/python/cpython/... | f41e9c750e6971c165e055374a1014d6afd2d50e | 86c3316183a79867e3c666d0830f897e16f0f339 |
python/cpython | python__cpython-134028 | # DBM Module Vacuuming
# Feature or enhancement
### Proposal:
Good afternoon,
The `dbm` module, and by extension `shelve` as well, don't provide any way to reclaim free space when lots of deletions from the database happen. This applies to all of the `dbm` submodules (`dbm.dumb`, `dbm.sqlite`, `dbm.ndbm`, `dbm.gnu`)... | f806463e16428ea4b379bf547bafa11f43a480ef | b5952371668089299bc8472c1adb9f8a0e69b4a2 |
python/cpython | python__cpython-134035 | # Incorrect syntax error
# Bug report
### Bug description:
```python
>>> try: 1/0
... except Exception as exc: raise from exc
...
File "<python-input-0>", line 2
except Exception as exc: raise from exc
^^^
SyntaxError: cannot use except statement with name
```
Should be:
```py
>>> try:... | 84914ad0e5f96f0ca7238f3b4bc7fc4e50b1abb3 | 7a9d46295a497669eaa6e647c33ab71c8cf620a1 |
python/cpython | python__cpython-133987 | # string split documentation unclear
# Documentation
If *sep* is not specified or is ``None`` and *maxsplit* is ``0``, only leading runs of consecutive whitespace are considered. This is contrary to (or, at least, underspecified in) the current documentation.
<!-- gh-linked-prs -->
### Linked PRs
* gh-133987
* gh-1... | 3e23047363f384b7254b7af51afe4e353be94167 | 6df39765e652ba06267f8e7abae431c37194a23e |
python/cpython | python__cpython-133988 | # Some operations on managed dict are not safe from memory_order POV
# Bug report
### Bug description:
First of all, I'm not a threading expert and my understanding of the memory-ordering model may be wrong. So, if I'm wrong I will be happy to fix my knowledge lacoons.
I saw some inconsistency (from my sight) of lo... | ec39fd2c20323ee9814a1137b1a0819e92efae4e | 317c49622397222b7c7fb49837e6b1fd7e82a80d |
python/cpython | python__cpython-133832 | # Using the public PyUnicodeWriter C API made the json module slower
I modified the json module to replace the private _PyUnicodeWriter C API with the public PyUnicodeWriter C API:
* https://github.com/python/cpython/commit/6e63c4736beebdf912acd391fc437672ee9d362e
* https://github.com/python/cpython/commit/c914212474... | c81446af1dbf3c84bfd4ed604c245dd40463fd3a | 379d0bc95646dfe923e7ea05fb7f1befbd85572d |
python/cpython | python__cpython-135347 | # Recording and restoring the LC_NUMERIC locale setting with LC_ALL=C.UTF-8 no longer works with Python 3.13.3
# Bug report
### Bug description:
We have project where we record the current value of `locale.LC_NUMERIC`, change it to a different value to use a library that needs a particular locale setting, and then r... | 0f866cbfefd797b4dae25962457c5579bb90dde5 | ff2b5f40c2bf5c71255caac8a743c09ba0758c02 |
python/cpython | python__cpython-133961 | # Simplify `typing.evaluate_forward_ref`
# Bug report
In PEP-749 I added `typing.evaluate_forward_ref` to replace the private `typing.ForwardRef._evaluate`, which is being used by some external users.
The current [documentation](https://docs.python.org/3.14/library/typing.html#typing.evaluate_forward_ref) claims the... | 57fef27cfc2bdfc1e3a65ef8c8a760198d15b14d | b51b08a0a5fedde4f74e4cc338b8b5ad9656ad50 |
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