b00c7c2d1d
The issue manifests itself as the following on `aarch64-darwin`:
```
>>> import ctypes
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/nix/store/i8cq0xrjirz1rcp65wzcyhj6ypzlw9il-python3-3.7.10/lib/python3.7/ctypes/__init__.py", line 551, in <module>
_reset_cache()
File "/nix/store/i8cq0xrjirz1rcp65wzcyhj6ypzlw9il-python3-3.7.10/lib/python3.7/ctypes/__init__.py", line 273, in _reset_cache
CFUNCTYPE(c_int)(lambda: None)
MemoryError
```
The commit we backport is included in Python 3.8, and it reverts
the change that was introduced all the way back in Python 2.7.
37 lines
1.8 KiB
Diff
37 lines
1.8 KiB
Diff
From e6b247c8e524dbe5fc03b3492f628d0d5348bc49 Mon Sep 17 00:00:00 2001
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From: Victor Stinner <vstinner@redhat.com>
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Date: Tue, 18 Dec 2018 14:47:21 +0100
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Subject: [PATCH] bpo-35523: Remove ctypes callback workaround (GH-11211)
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Remove ctypes callback workaround: no longer create a callback at startup.
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Avoid SELinux alert on "import ctypes" and "import uuid".
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---
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Lib/ctypes/__init__.py | 5 -----
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.../next/Library/2018-12-18-13-52-13.bpo-35523.SkoMno.rst | 2 ++
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2 files changed, 2 insertions(+), 5 deletions(-)
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create mode 100644 Misc/NEWS.d/next/Library/2018-12-18-13-52-13.bpo-35523.SkoMno.rst
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diff --git a/Lib/ctypes/__init__.py b/Lib/ctypes/__init__.py
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index 6146773988648..5f78beda5866e 100644
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--- a/Lib/ctypes/__init__.py
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+++ b/Lib/ctypes/__init__.py
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@@ -266,11 +266,6 @@ def _reset_cache():
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# _SimpleCData.c_char_p_from_param
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POINTER(c_char).from_param = c_char_p.from_param
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_pointer_type_cache[None] = c_void_p
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- # XXX for whatever reasons, creating the first instance of a callback
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- # function is needed for the unittests on Win64 to succeed. This MAY
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- # be a compiler bug, since the problem occurs only when _ctypes is
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- # compiled with the MS SDK compiler. Or an uninitialized variable?
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- CFUNCTYPE(c_int)(lambda: None)
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def create_unicode_buffer(init, size=None):
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"""create_unicode_buffer(aString) -> character array
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diff --git a/Misc/NEWS.d/next/Library/2018-12-18-13-52-13.bpo-35523.SkoMno.rst b/Misc/NEWS.d/next/Library/2018-12-18-13-52-13.bpo-35523.SkoMno.rst
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new file mode 100644
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index 0000000000000..94a9fd257383e
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--- /dev/null
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+++ b/Misc/NEWS.d/next/Library/2018-12-18-13-52-13.bpo-35523.SkoMno.rst
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@@ -0,0 +1,2 @@
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+Remove :mod:`ctypes` callback workaround: no longer create a callback at
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+startup. Avoid SELinux alert on ``import ctypes`` and ``import uuid``.
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