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

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@20578 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/eval.c b/eval.c
index dbcbb8e5af..c83bb2fc60 100644
--- a/eval.c
+++ b/eval.c
@@ -5060,7 +5060,7 @@ rb_yield_0(val, self, klass, flags, avalue)
 	    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: