nobu	2008-12-08 13:51:43 +0900 (Mon, 08 Dec 2008)

  New Revision: 20578

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=20578

  Log:
    * eval.c (rb_yield_0): Qundef means no argument.  [ruby-Bugs-22525]

  Modified files:
    branches/ruby_1_8/ChangeLog
    branches/ruby_1_8/eval.c

Index: ruby_1_8/ChangeLog
===================================================================
--- ruby_1_8/ChangeLog	(revision 20577)
+++ ruby_1_8/ChangeLog	(revision 20578)
@@ -1,3 +1,7 @@
+Mon Dec  8 13:51:41 2008  Nobuyoshi Nakada  <nobu@r...>
+
+	* eval.c (rb_yield_0): Qundef means no argument.  [ruby-Bugs-22525]
+
 Sun Dec  7 23:47:37 2008  Nobuyoshi Nakada  <nobu@r...>
 
 	* configure.in (LIBPATHFLAG): use numbered specifier if RPATHFLAG
Index: ruby_1_8/eval.c
===================================================================
--- ruby_1_8/eval.c	(revision 20577)
+++ ruby_1_8/eval.c	(revision 20578)
@@ -5060,7 +5060,7 @@
 	    switch (node->nd_state) {
 	      case YIELD_FUNC_LAMBDA:
 		if (!avalue) {
-		    val = rb_ary_new3(1, val);
+		    val = (val == Qundef) ? rb_ary_new2(0) : rb_ary_new3(1, val);
 		}
 		break;
 	      case YIELD_FUNC_AVALUE:

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