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-rw-r--r--Modules/collectionsmodule.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/Modules/collectionsmodule.c b/Modules/collectionsmodule.c
index cb12b3a6a7..ca4b327059 100644
--- a/Modules/collectionsmodule.c
+++ b/Modules/collectionsmodule.c
@@ -911,15 +911,14 @@ dequeiter_next(dequeiterobject *it)
{
PyObject *item;
- if (it->counter == 0)
- return NULL;
-
if (it->deque->state != it->state) {
it->counter = 0;
PyErr_SetString(PyExc_RuntimeError,
"deque mutated during iteration");
return NULL;
}
+ if (it->counter == 0)
+ return NULL;
assert (!(it->b == it->deque->rightblock &&
it->index > it->deque->rightindex));