Not being able to hotswap when debugging is a productivity pain for me. I'm in the C# world, and edit-n-continue is severely limited. JRebel is very good with

Not being able to hotswap when debugging is a productivity pain for me. I'm in the C# world, and edit-n-continue is severely limited. JRebel is very good with doing hotswap with Java, but it has its limitations too. Ideally, I'd like a programming environment to go into interpreted mode so that if a change is made and its horribly wrong, it just throws an exception.