So testing out PHP 7 I triggered an \EngineException() in Drupal 8. For various reasons that don't really matter here Drupal uses set_exception_handler() to provide its own exception handler. What is important is that the methods used by that handler type hint \Exception for their arguments. The immediately fatals.
By design, \EngineException does not extend \Exception so code doesn't accidentally catch this special type of exception. Unfortunately they still always make their way into this exception handler. Unfortunately this means we have to remove the type hinting to support forward compatibility which is a bit akward and unfortunate. I don't know if this is all acceptable and/or by design but it is awkward so I wanted to bring it to the list to discuss. Simplified test case. Sorry for not putting it on 3v4l but its currently unreachable. https://gist.github.com/neclimdul/ab29ddb223cfc197e635
