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# Bug report
### Bug description:
The optimizer currently calls `getenv` during every optimization attempt. This has a small, but [statistically significant 0.5% impact on performance](https://gith…
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# Bug report
### Bug description:
```
$ ./python -m test -v test_decimal -m __round__
...
======================================================================
FAIL: __round__ (decimal.Decimal)
Doc…
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# Bug report
### Bug description:
```python
>>> import re
>>> list(re.finditer(r'\b', 'e'))
[, ]
>>> list(re.finditer(r'\B', 'e'))
[]
>>> list(re.finditer(r'\b', '%'))
[]
>>> list(re.finditer(r'\B',…
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# Bug report
### Bug description:
If `importlib` library is compiled (in particular `_common.py`), then any package, that uses bare `files()` to get its resources, breaks, because `_infer_caller…
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# Bug report
### Bug description:
I got a [bug report](https://github.com/pycompression/python-zlib-ng/issues/53) on python-zlib-ng where using the threaded opening the program would hang if an …
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# Bug report
### Bug description:
I used the installer to upgrade from a Python 3.13.0rc1 install to a Python 3.13.0rc2 install. In the 3.13.0rc1 install, I had installed the free-threaded binaries.…
TBBle updated
1 month ago
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https://github.com/python/cpython/pull/116129#discussion_r1575794751
I'll try to do this in a bit, but if someone else gets to it first, feel free to pick it up.
### Linked PRs
* gh-124473
* gh-1…
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# Bug report
### Bug description:
An example:
```pycon
>>> bytes.maketrans.__module__ is None
True
```
c.f. pure-python staticmethod:
```pycon
>>> class Spam:
... @staticmethod
... …
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# Bug report
### Bug description:
This came up in python/typeshed#12414.
The current implementation of `file_digest()` does not check the return value of `fileobj.readinto()` for `None`:
https://g…
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# Bug report
### Bug description:
Several methods from the C implementation of the itertools module are not yet safe to use under the free-threading build. In this issue we list several issues to b…