bpo-34397: Remove redundant overflow checks in list and tuple implementation. (GH-8757)
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 37fadca..30d2620 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -261,12 +261,8 @@
PyErr_BadInternalCall();
return -1;
}
- if (n == PY_SSIZE_T_MAX) {
- PyErr_SetString(PyExc_OverflowError,
- "cannot add more objects to list");
- return -1;
- }
+ assert((size_t)n + 1 < PY_SSIZE_T_MAX);
if (list_resize(self, n+1) < 0)
return -1;
@@ -301,12 +297,7 @@
Py_ssize_t n = PyList_GET_SIZE(self);
assert (v != NULL);
- if (n == PY_SSIZE_T_MAX) {
- PyErr_SetString(PyExc_OverflowError,
- "cannot add more objects to list");
- return -1;
- }
-
+ assert((size_t)n + 1 < PY_SSIZE_T_MAX);
if (list_resize(self, n+1) < 0)
return -1;
@@ -503,8 +494,7 @@
return NULL;
}
#define b ((PyListObject *)bb)
- if (Py_SIZE(a) > PY_SSIZE_T_MAX - Py_SIZE(b))
- return PyErr_NoMemory();
+ assert((size_t)Py_SIZE(a) + (size_t)Py_SIZE(b) < PY_SSIZE_T_MAX);
size = Py_SIZE(a) + Py_SIZE(b);
np = (PyListObject *) list_new_prealloc(size);
if (np == NULL) {