updated for version 7.2c-001
diff --git a/src/eval.c b/src/eval.c
index cb548d3..5802a08 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -6231,8 +6231,11 @@
listitem_T *bef;
{
listitem_T *item;
+ int todo = l2->lv_len;
- for (item = l2->lv_first; item != NULL; item = item->li_next)
+ /* We also quit the loop when we have inserted the original item count of
+ * the list, avoid a hang when we extend a list with itself. */
+ for (item = l2->lv_first; item != NULL && --todo >= 0; item = item->li_next)
if (list_insert_tv(l1, &item->li_tv, bef) == FAIL)
return FAIL;
return OK;