fix initialize ns[1] to NULL

diff --git a/src/regparse.c b/src/regparse.c
index 947d7cbe4561e0b5cee1b6d2390ee05e276bc26d..492e53b0d6af09025c6e2b95cb936865506523f5 100644 (file)
--- a/src/regparse.c
+++ b/src/regparse.c
@@ -1610,6 +1610,8 @@ make_extended_grapheme_cluster(Node** node, ScanEnv* env)
 
   /* \X == \O(?:\Y\O)*+ */
 
+  ns[1] = NULL_NODE;
+
   r = ONIGERR_MEMORY;
   ns[0] = onig_node_new_anchor(ANCHOR_NO_EXTENDED_GRAPHEME_CLUSTER_BOUNDARY, 0);
   if (IS_NULL(ns[0])) goto err;