* parse.y (list_concat): should not modify nodes other than

  NODE_ARRAY.  [ruby-dev:28583]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@10098 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/parse.y b/parse.y
index 18f1668e57..d50f06d104 100644
--- a/parse.y
+++ b/parse.y
@@ -4665,6 +4665,8 @@ list_concat(head, tail)
 {
     NODE *last;
 
+    if (nd_type(tail) != NODE_ARRAY)
+        return list_append(head, tail);
     if (head->nd_next) {
 	last = head->nd_next->nd_end;
     }