nobu	2017-08-19 09:45:22 +0900 (Sat, 19 Aug 2017)

  New Revision: 59620

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=59620

  Log:
    class.c: call rb_hash_keys directly

  Modified files:
    trunk/class.c
Index: class.c
===================================================================
--- class.c	(revision 59619)
+++ class.c	(revision 59620)
@@ -1804,15 +1804,12 @@ static void https://github.com/ruby/ruby/blob/trunk/class.c#L1804
 unknown_keyword_error(VALUE hash, const ID *table, int keywords)
 {
     st_table *tbl = rb_hash_tbl_raw(hash);
-    VALUE keys;
     int i;
     for (i = 0; i < keywords; i++) {
 	st_data_t key = ID2SYM(table[i]);
 	st_delete(tbl, &key, NULL);
     }
-    keys = rb_funcallv(hash, rb_intern("keys"), 0, 0);
-    if (!RB_TYPE_P(keys, T_ARRAY)) rb_raise(rb_eArgError, "unknown keyword");
-    rb_keyword_error("unknown", keys);
+    rb_keyword_error("unknown", rb_hash_keys(hash));
 }
 
 static int

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