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gh-132314: fix stack array init warning#132376

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17 changes: 17 additions & 0 deletionsInclude/pymacro.h
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Original file line numberDiff line numberDiff line change
Expand Up@@ -199,4 +199,21 @@ PyAPI_FUNC(uint32_t) Py_PACK_VERSION(int x, int y);
#endif // Py_LIMITED_API < 3.14


#if defined(__clang__)
#define DISABLE_UNINIT_WARNINGS _Pragma("clang diagnostic push") \
_Pragma("clang diagnostic ignored \"-Wuninitialized\"")
#define ENABLE_UNINIT_WARNINGS _Pragma("clang diagnostic pop")
#elif defined(__GNUC__) || defined(__GNUG__)
#define DISABLE_UNINIT_WARNINGS _Pragma("GCC diagnostic push") \
_Pragma("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
#define ENABLE_UNINIT_WARNINGS _Pragma("GCC diagnostic pop")
#elif defined(_MSC_VER)
#define DISABLE_UNINIT_WARNINGS __pragma(warning(push)) \
__pragma(warning(disable: 4700))
#define ENABLE_UNINIT_WARNINGS __pragma(warning(pop))
#else
#define DISABLE_UNINIT_WARNINGS
#define ENABLE_UNINIT_WARNINGS
#endif

#endif /* Py_PYMACRO_H */
2 changes: 2 additions & 0 deletionsPython/ceval.c
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Original file line numberDiff line numberDiff line change
Expand Up@@ -1814,6 +1814,7 @@ _PyEvalFramePushAndInit_Ex(PyThreadState *tstate, _PyStackRef func,
PyObject *kwnames = NULL;
_PyStackRef *newargs;
PyObject *const *object_array = NULL;
DISABLE_UNINIT_WARNINGS
_PyStackRef stack_array[8];
if (has_dict) {
object_array = _PyStack_UnpackDict(tstate, _PyTuple_ITEMS(callargs), nargs, kwargs, &kwnames);
Expand DownExpand Up@@ -1855,6 +1856,7 @@ _PyEvalFramePushAndInit_Ex(PyThreadState *tstate, _PyStackRef func,
else if (nargs > 8) {
PyMem_Free((void *)newargs);
}
ENABLE_UNINIT_WARNINGS
/* No need to decref func here because the reference has been stolen by
_PyEvalFramePushAndInit.
*/
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