diff options
| -rw-r--r-- | Modules/_collectionsmodule.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c index cc9e4e8..b77ea65 100644 --- a/Modules/_collectionsmodule.c +++ b/Modules/_collectionsmodule.c @@ -895,7 +895,8 @@ deque_reverse(dequeobject *deque, PyObject *unused) Py_ssize_t n = Py_SIZE(deque) >> 1; PyObject *tmp; - while (n-- > 0) { + n++; + while (--n) { /* Validate that pointers haven't met in the middle */ assert(leftblock != rightblock || leftindex < rightindex); CHECK_NOT_END(leftblock); |