Don't ICE when encountering bound regions in generator interior type I'm pretty sure this meant to say "`has_free_regions`", probably just a typo in 4a4fc3bb5b1efe6857cf5d6c0b554ff36b966996. We can have bound regions (because we only convert non-bound regions into existential regions in generator interiors), but we can't have (non-ReErased) free regions. r? lcnr