Files
cpython/Modules/_testcapi
Victor Stinner c1a4112c22 gh-147988: Initialize digits in long_alloc() in debug mode (#147989)
When Python is built in debug mode:

* long_alloc() now initializes digits with a pattern to detect usage of
  uninitialized digits.
* _PyLong_CompactValue() now makes sure that the digit is zero when the
  sign is zero.
* PyLongWriter_Finish() now raises SystemError if it detects uninitialized
  digits

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
2026-04-02 11:55:34 +00:00
..

Tests in this directory are compiled into the _testcapi extension.
The main file for the extension is Modules/_testcapimodule.c, which
calls `_PyTestCapi_Init_*` from these functions.

General guideline when writing test code for C API.
* Use Argument Clinic to minimise the amount of boilerplate code.
* Add a newline between the argument spec and the docstring.
* If a test description is needed, make sure the added docstring clearly and succinctly describes purpose of the function.
* DRY, use the clone feature of Argument Clinic.
* Try to avoid adding new interned strings; reuse existing parameter names if possible. Use the `as` feature of Argument Clinic to override the C variable name, if needed.