duerst	2018-12-01 15:07:53 +0900 (Sat, 01 Dec 2018)

  New Revision: 66113

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=66113

  Log:
    eliminate a list with only one element

  Modified files:
    trunk/regparse.c
Index: regparse.c
===================================================================
--- regparse.c	(revision 66112)
+++ regparse.c	(revision 66113)
@@ -6129,15 +6129,10 @@ node_extended_grapheme_cluster(Node** np https://github.com/ruby/ruby/blob/trunk/regparse.c#L6129
     /* RI-Sequence := Regional_Indicator{2} */
     R_ERR(quantify_property_node(&np1, env, "Regional_Indicator", '2'));
 
-    tmp = node_new_list(np1, list2); /* here, list2 should be guaranteed to be NULL */
-    if (IS_NULL(tmp)) goto err;
-    list2 = tmp;
-    np1 = NULL;
-
-    tmp = onig_node_new_alt(list2, alt);
+    tmp = onig_node_new_alt(np1, alt);
     if (IS_NULL(tmp)) goto err;
     alt = tmp;
-    list2 = NULL;
+    np1 = NULL;
 
     tmp = node_new_list(alt, list);
     if (IS_NULL(tmp)) goto err;

--
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