[jub0bs]

Your post does show that iterators are somewhat of a leaky abstraction, but I'm not sure I would go as far as calling some of their infelicities "bugs". Whether those infelicities matter in practice is a moot point.

[tapirl]

The bug is confirmed: https://github.com/golang/go/issues/71685

[jub0bs]

Ok, that is annoying. I hope it gets fixed soon.