JuliaLang/julia — pull request #8572 by danluu (2014-10-03 17:46:49+00:00)
Title: Avoid attempting to poll on non-existent file

`poll_file` doesn't work if you poll on a file that doesn't exist. Even if you create the named file before the timeout and modify it, `poll_file` will wait until the timeout and then return false.