diff --git a/src/list.c b/src/list.c
index 336bf3b..8e67a61 100644
--- a/src/list.c
+++ b/src/list.c
@@ -952,7 +952,10 @@
 
 	    vimlist_remove(list, item, item);
 	    if (list_extend(list, item->li_tv.vval.v_list, next) == FAIL)
+	    {
+		list_free_item(list, item);
 		return;
+	    }
 	    clear_tv(&item->li_tv);
 	    tofree = item;
 
@@ -1023,6 +1026,9 @@
 	rettv->vval.v_list = l;
 	if (l == NULL)
 	    return;
+	// The type will change.
+	free_type(l->lv_type);
+	l->lv_type = NULL;
     }
     else
     {
@@ -1217,7 +1223,7 @@
     copy = list_alloc();
     if (copy != NULL)
     {
-	copy->lv_type = orig->lv_type;
+	copy->lv_type = alloc_type(orig->lv_type);
 	if (copyID != 0)
 	{
 	    // Do this before adding the items, because one of the items may