Introduced the oddly-missing PyList_CheckExact(), and used it to replace
a hard-coded type check.
diff --git a/Include/listobject.h b/Include/listobject.h
index af1368c..1befe86 100644
--- a/Include/listobject.h
+++ b/Include/listobject.h
@@ -27,6 +27,7 @@
extern DL_IMPORT(PyTypeObject) PyList_Type;
#define PyList_Check(op) PyObject_TypeCheck(op, &PyList_Type)
+#define PyList_CheckExact(op) ((op)->ob_type == &PyList_Type)
extern DL_IMPORT(PyObject *) PyList_New(int size);
extern DL_IMPORT(int) PyList_Size(PyObject *);
diff --git a/Python/ceval.c b/Python/ceval.c
index b3e35c2..25ba4a0 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -989,7 +989,7 @@
case BINARY_SUBSCR:
w = POP();
v = POP();
- if (v->ob_type == &PyList_Type && PyInt_CheckExact(w)) {
+ if (PyList_CheckExact(v) && PyInt_CheckExact(w)) {
/* INLINE: list[int] */
long i = PyInt_AsLong(w);
if (i < 0)