Closed
Description
On linux, using yield Recoil::write($pipe, $data) when the other end of the pipe is closed (for example its process has exited) leads to an infinite loop in ReactApi::write().
I found that stream_select() marks the stream as ready to write, but fwrite() returns 0 (not false), and no errors are thrown. See http://php.net/manual/en/function.fwrite.php#96951
I propose the solution taken by react/stream, i.e. check here for $bytes === 0 as well. stream_select() indicates that it's possible to write at least one byte, so zero can only mean an error condition.
I think this applies to the reference kernel as well.
Thank you.