It seems like both problems in the Go standard library should be fixable? They are corner cases that could be made to work without breaking anyone.
Looks like it's harder to do a redbean in golang than it should be at the moment.
TBF, implementing Redbean in C required 3000+ lines and several third party dependencies. Of course it's more full-featured than this Go "proof of concept", but still, I assume it would be much easier to implement Redbean in Go than in C - as you would expect from a much younger "batteries-included" language.
Wasn't criticizing Go. It's the most Wirth-like language we have today with a vibrant ecosystem. Looking at their github, they're already on it.