glass	2015-05-10 11:06:06 +0900 (Sun, 10 May 2015)

  New Revision: 50451

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=50451

  Log:
    temp

  Modified files:
    trunk/enum.c
Index: enum.c
===================================================================
--- enum.c	(revision 50450)
+++ enum.c	(revision 50451)
@@ -515,7 +515,14 @@ enum_flat_map(VALUE obj) https://github.com/ruby/ruby/blob/trunk/enum.c#L515
 static VALUE
 enum_to_a(int argc, VALUE *argv, VALUE obj)
 {
-    VALUE ary = rb_ary_new();
+    VALUE ary, size = rb_check_funcall(obj, id_size, 0, 0);
+
+    if (size == Qundef) {
+	ary = rb_ary_new();
+    }
+    else {
+	ary = rb_ary_new2(NUM2LONG(size));
+    }
 
     rb_block_call(obj, id_each, argc, argv, collect_all, ary);
     OBJ_INFECT(ary, obj);

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