parse.y: do not use disposed string
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47973 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
parse.y: do not use disposed string
and disposed code fragment. [ruby-dev:48647] [Bug #10392]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47973 b2dd03c8-39d4-4d8f-98ff-823fe69b080e