It appears to swap out $stderr with a StringIO and StringIO isn't threadsafe and then doesn't wrap it in a lock. It's been tripping up people in the #jruby cha

It appears to swap out $stderr with a StringIO and StringIO isn't threadsafe and then doesn't wrap it in a lock. It's been tripping up people in the #jruby channel. This is a gist from one earlier today: https://gist.github.com/be34c0a5666db0c83629 https://gist.github.com/be34c0a5666db0c83629