diff options
| -rw-r--r-- | Objects/listobject.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/Objects/listobject.c b/Objects/listobject.c index 452ffe5a5c..61edd45f3b 100644 --- a/Objects/listobject.c +++ b/Objects/listobject.c @@ -19,9 +19,8 @@ list_resize(PyListObject *self, int newsize) current size, then proceed with the realloc() to shrink the list. */ - if (self->allocated >= newsize && - self->ob_size < newsize + 16 && - self->ob_item != NULL) { + if (self->allocated >= newsize && self->ob_size < newsize + 16) { + assert(self->ob_item != NULL || newsize == 0); self->ob_size = newsize; return 0; } @@ -2314,6 +2313,11 @@ list_init(PyListObject *self, PyObject *args, PyObject *kw) if (!PyArg_ParseTupleAndKeywords(args, kw, "|O:list", kwlist, &arg)) return -1; + + /* Verify list invariants established by PyType_GenericAlloc() */ + assert(0 <= self->ob_size && self->ob_size <= self->allocated); + assert(self->ob_item != NULL || self->allocated == 0); + /* Empty previous contents */ if (self->ob_item != NULL) { (void)list_clear(self); |