Aug 24, 2025 · Aug 24, 2025
diff --git a/Include/internal/pycore_tstate.h b/Include/internal/pycore_tstate.h
 };
 #endif

 /* How much scratch space to give stackref to PyObject* conversion. */
 #define MAX_STACKREF_SCRATCH 10


 // Every PyThreadState is actually allocated as a _PyThreadStateImpl. The
 // PyThreadState fields are exposed as part of the C API, although most fields
 // are intended to be private. The _PyThreadStateImpl fields not exposed.
    struct _qsbr_thread_state *qsbr;  // only used by free-threaded build
    struct llist_node mem_free_queue; // delayed free queue

    // Scratch space to convert _PyStackRef to PyObject *
    // +1 to account for possible vectorcalls.
    PyObject *stackref_scratch[MAX_STACKREF_SCRATCH + 1];
 #ifdef Py_GIL_DISABLED
    // Stack references for the current thread that exist on the C stack
    struct _PyCStackRef *c_stack_refs;
diff --git a/Python/ceval_macros.h b/Python/ceval_macros.h

 /* Stackref macros */

 /* How much scratch space to give stackref to PyObject* conversion. */
 #define MAX_STACKREF_SCRATCH 10

 #define STACKREFS_TO_PYOBJECTS(ARGS, ARG_COUNT, NAME) \
    /* +1 because vectorcall might use -1 to write self */ \
    PyObject *NAME##_temp[MAX_STACKREF_SCRATCH+1]; \
    _PyThreadStateImpl *_tstate = (_PyThreadStateImpl *)tstate; \
    PyObject **NAME##_temp = _tstate->stackref_scratch; \
    PyObject **NAME = _PyObjectArray_FromStackRefArray(ARGS, ARG_COUNT, NAME##_temp + 1);

 #define STACKREFS_TO_PYOBJECTS_CLEANUP(NAME) \
Original file line number	Diff line number	Diff line change
Expand Up		@@ -21,6 +21,10 @@ struct _gc_thread_state {
		};
		#endif

		/* How much scratch space to give stackref to PyObject* conversion. */
		#define MAX_STACKREF_SCRATCH 10


		// Every PyThreadState is actually allocated as a _PyThreadStateImpl. The
		// PyThreadState fields are exposed as part of the C API, although most fields
		// are intended to be private. The _PyThreadStateImpl fields not exposed.
Expand All		@@ -47,6 +51,9 @@ typedef struct _PyThreadStateImpl {
		struct _qsbr_thread_state *qsbr; // only used by free-threaded build
		struct llist_node mem_free_queue; // delayed free queue

		// Scratch space to convert _PyStackRef to PyObject *
		// +1 to account for possible vectorcalls.
		PyObject *stackref_scratch[MAX_STACKREF_SCRATCH + 1];
		#ifdef Py_GIL_DISABLED
		// Stack references for the current thread that exist on the C stack
		struct _PyCStackRef *c_stack_refs;
Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -390,12 +390,10 @@ do { \

		/* Stackref macros */

		/* How much scratch space to give stackref to PyObject* conversion. */
		#define MAX_STACKREF_SCRATCH 10

		#define STACKREFS_TO_PYOBJECTS(ARGS, ARG_COUNT, NAME) \
		/* +1 because vectorcall might use -1 to write self */ \
		PyObject *NAME##_temp[MAX_STACKREF_SCRATCH+1]; \
		_PyThreadStateImpl _tstate = (_PyThreadStateImpl )tstate; \
		PyObject **NAME##_temp = _tstate->stackref_scratch; \
		PyObject **NAME = _PyObjectArray_FromStackRefArray(ARGS, ARG_COUNT, NAME##_temp + 1);

		#define STACKREFS_TO_PYOBJECTS_CLEANUP(NAME) \
Expand Down