revert r61371 for [Bug #14214]
Reverted patch doesn't check overwritten value.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61387 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
revert r61371 for [Bug #14214]
Reverted patch doesn't check overwritten value.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61387 b2dd03c8-39d4-4d8f-98ff-823fe69b080e