* eval.c (rb_yield_0): avoid core dump. [ruby-dev:28840]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@10407 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/eval.c b/eval.c
index ec1beb3ac..cca4c44c6 100644
--- a/eval.c
+++ b/eval.c
@@ -4740,7 +4740,10 @@ rb_yield_0(VALUE val, VALUE self, VALUE klass /* OK */, int flags)
 	    }
 	    else {
 		if (pcall) {
-		    val = RARRAY(val)->ptr[0];
+                    if (RARRAY(val)->len == 0)
+                        val = Qnil;
+                    else
+                        val = RARRAY(val)->ptr[0];
 		}
 		assign(self, var, val, pcall);
 	    }