* parse.y (block_param): do not use multiple assignment for a sole

  block parameter.  [ruby-dev:28710]

* eval.c (rb_yield_0): pass a raw yielded value to a sole block
  parameter if a value is passed by yield.

* eval.c (proc_invoke): args may not be an array.

* eval.c (rb_proc_yield): pass original value without wrapping
  it in an array.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@10356 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 1 deletions

diff --git a/parse.y b/parse.y
index 3af47099f..53b4df983 100644
--- a/parse.y
+++ b/parse.y
@@ -2900,7 +2900,13 @@ block_param0	: mlhs_item
 block_param	: block_param0
 		    {
 		    /*%%%*/
-			$$ = NEW_MASGN($1, 0);
+                        if ($1->nd_alen == 1) {
+                            $$ = $1->nd_head;
+                            rb_gc_force_recycle((VALUE)$1);
+                        }
+                        else {
+                            $$ = NEW_MASGN($1, 0);
+                        }
 		    /*%
 			$$ = blockvar_new($1);
 		    %*/