One thing that Go does better here than I've seen in other (compiled) languages so far, is that you can literally just cd into GOROOT, do your changes and a bui

One thing that Go does better here than I've seen in other (compiled) languages so far, is that you can literally just cd into GOROOT, do your changes and a build of your project will pick up on the changed stdlib and re-compile it on-the-fly. I pretty regularly do that as a debugging aide. Of course, it isn't just as simple with the compiler itself, you still have to re-build that one manually.