1 files changed, 33 insertions, 24 deletions

diff --git a/contrib/tools/python3/src/Objects/sliceobject.c b/contrib/tools/python3/src/Objects/sliceobject.c
index 391711f711a..22fb7c61c35 100644
--- a/contrib/tools/python3/src/Objects/sliceobject.c
+++ b/contrib/tools/python3/src/Objects/sliceobject.c
@@ -15,7 +15,8 @@ this type and there is exactly one in existence.
 
 #include "Python.h"
 #include "pycore_abstract.h"      // _PyIndex_Check()
-#include "pycore_object.h"
+#include "pycore_long.h"          // _PyLong_GetZero()
+#include "pycore_object.h"        // _PyObject_GC_TRACK()
 #include "structmember.h"         // PyMemberDef
 
 static PyObject *
@@ -95,16 +96,12 @@ PyObject _Py_EllipsisObject = {
 
 /* Slice object implementation */
 
-/* Using a cache is very effective since typically only a single slice is
- * created and then deleted again
- */
-static PySliceObject *slice_cache = NULL;
 
-void _PySlice_Fini(void)
+void _PySlice_Fini(PyInterpreterState *interp)
 {
-    PySliceObject *obj = slice_cache;
+    PySliceObject *obj = interp->slice_cache;
     if (obj != NULL) {
-        slice_cache = NULL;
+        interp->slice_cache = NULL;
         PyObject_GC_Del(obj);
     }
 }
@@ -116,26 +113,35 @@ void _PySlice_Fini(void)
 PyObject *
 PySlice_New(PyObject *start, PyObject *stop, PyObject *step)
 {
+    if (step == NULL) {
+        step = Py_None;
+    }
+    if (start == NULL) {
+        start = Py_None;
+    }
+    if (stop == NULL) {
+        stop = Py_None;
+    }
+
+    PyInterpreterState *interp = _PyInterpreterState_GET();
     PySliceObject *obj;
-    if (slice_cache != NULL) {
-        obj = slice_cache;
-        slice_cache = NULL;
+    if (interp->slice_cache != NULL) {
+        obj = interp->slice_cache;
+        interp->slice_cache = NULL;
         _Py_NewReference((PyObject *)obj);
-    } else {
+    }
+    else {
         obj = PyObject_GC_New(PySliceObject, &PySlice_Type);
-        if (obj == NULL)
+        if (obj == NULL) {
             return NULL;
+        }
     }
 
-    if (step == NULL) step = Py_None;
     Py_INCREF(step);
-    if (start == NULL) start = Py_None;
-    Py_INCREF(start);
-    if (stop == NULL) stop = Py_None;
-    Py_INCREF(stop);
-
     obj->step = step;
+    Py_INCREF(start);
     obj->start = start;
+    Py_INCREF(stop);
     obj->stop = stop;
 
     _PyObject_GC_TRACK(obj);
@@ -324,14 +330,17 @@ Create a slice object.  This is used for extended slicing (e.g. a[0:10:2]).");
 static void
 slice_dealloc(PySliceObject *r)
 {
+    PyInterpreterState *interp = _PyInterpreterState_GET();
     _PyObject_GC_UNTRACK(r);
     Py_DECREF(r->step);
     Py_DECREF(r->start);
     Py_DECREF(r->stop);
-    if (slice_cache == NULL)
-        slice_cache = r;
-    else
+    if (interp->slice_cache == NULL) {
+        interp->slice_cache = r;
+    }
+    else {
         PyObject_GC_Del(r);
+    }
 }
 
 static PyObject *
@@ -379,7 +388,7 @@ _PySlice_GetLongIndices(PySliceObject *self, PyObject *length,
 
     /* Convert step to an integer; raise for zero step. */
     if (self->step == Py_None) {
-        step = _PyLong_One;
+        step = _PyLong_GetOne();
         Py_INCREF(step);
         step_is_negative = 0;
     }
@@ -408,7 +417,7 @@ _PySlice_GetLongIndices(PySliceObject *self, PyObject *length,
             goto error;
     }
     else {
-        lower = _PyLong_Zero;
+        lower = _PyLong_GetZero();
         Py_INCREF(lower);
         upper = length;
         Py_INCREF(upper);