Incorrect/unreasonable suppression behavior of s.u.Using

[NthPortal]

I was looking over the docs for Using recently, and noticed that ControlThrowable suppresses NonFatal exceptions. But I don't think that should be the case. ControlThrowable is control-flow, and ought to lose to "something went wrong".

Currently, exceptions are ranked using this method in which all NonFatal exceptions are ranked lower than fatal exceptions, and the various fatal exceptions are ranked relative to each other. ControlThrowable is already suppressed in favour of any other fatal exception; I simply propose it be suppressed in favour of all other exceptions.

While this does change behaviour potentially underneath users' feet, I think it is still a worthwhile change because:

• ControlThrowable (usually non-local return) isn't that common
• the current behaviour essentially silently drops exceptions
• I don't know if anyone has ever encountered this situation anyway