parse.y: should not eliminate value nodes
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47894 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
parse.y: should not eliminate value nodes
value nodes, which may have side effects.
[ruby-core:65625] [Bug #10315]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47894 b2dd03c8-39d4-4d8f-98ff-823fe69b080e