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gh-134989: Fix Py_RETURN_NONE in the limited C API (GH-135165)

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Fix Py_RETURN_NONE, Py_RETURN_TRUE and Py_RETURN_FALSE macros in the
limited C API 3.11 and older:
Don't treat Py_None, Py_True and Py_False as immortal.
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Victor Stinner 2025-06-05 14:43:47 +02:00 • committed by GitHub
parent 4b44b3409a
commit 9258f3da91
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3 changed files with 20 additions and 5 deletions
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13
Include/boolobject.h
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@ -34,9 +34,16 @@ PyAPI_FUNC(int) Py_IsTrue(PyObject *x);
PyAPI_FUNC(int) Py_IsFalse(PyObject *x);
#define Py_IsFalse(x) Py_Is((x), Py_False)
/* Macros for returning Py_True or Py_False, respectively */
#define Py_RETURN_TRUE return Py_True
#define Py_RETURN_FALSE return Py_False
/* Macros for returning Py_True or Py_False, respectively.
* Only treat Py_True and Py_False as immortal in the limited C API 3.12
* and newer. */
#if defined(Py_LIMITED_API) && Py_LIMITED_API+0 < 0x030c0000
# define Py_RETURN_TRUE return Py_NewRef(Py_True)
# define Py_RETURN_FALSE return Py_NewRef(Py_False)
#else
# define Py_RETURN_TRUE return Py_True
# define Py_RETURN_FALSE return Py_False
#endif
/* Function to return a bool from a C long */
PyAPI_FUNC(PyObject *) PyBool_FromLong(long);

9
Include/object.h
View file

@ -660,8 +660,13 @@ PyAPI_DATA(PyObject) _Py_NoneStruct; /* Don't use this directly */
PyAPI_FUNC(int) Py_IsNone(PyObject *x);
#define Py_IsNone(x) Py_Is((x), Py_None)
/* Macro for returning Py_None from a function */
#define Py_RETURN_NONE return Py_None
/* Macro for returning Py_None from a function.
* Only treat Py_None as immortal in the limited C API 3.12 and newer. */
#if defined(Py_LIMITED_API) && Py_LIMITED_API+0 < 0x030c0000
# define Py_RETURN_NONE return Py_NewRef(Py_None)
#else
# define Py_RETURN_NONE return Py_None
#endif
/*
Py_NotImplemented is a singleton used to signal that an operation is

3
Misc/NEWS.d/next/C_API/2025-06-05-11-06-07.gh-issue-134989.74p4ud.rst Normal file
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@ -0,0 +1,3 @@
Fix ``Py_RETURN_NONE``, ``Py_RETURN_TRUE`` and ``Py_RETURN_FALSE`` macros in
the limited C API 3.11 and older: don't treat ``Py_None``, ``Py_True`` and
``Py_False`` as immortal. Patch by Victor Stinner.