Windows 10 build 20175 (rs wdatp)

Windows 10 build 20175 (rs wdatp) is an unleaked build of Iron. A screenshot of this build was posted by GitHub user bityob, which shows the Windows Subsystem for Linux giving out the error "The I/O operation has been aborted because of either a thread exit or an application request" while attempting to start Ubuntu.

Source
GitHub