> Thanks for the patch sbt.
> I think this is indeed useful, but I'm tempted to go further and say
> we should make this the default - and only - behavior. This will
> probably break existing code that accidentaly relied the fact that the
> implementation uses a bare fork(),

There is probably lots of such code:
- code that passes non-pickleable function object / function args to
execute in the child process
- code that executes code with side effects at module top level
- code that relies (willingly or not) on other stuff such as fds being
inherited