{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"ResumedAfterReturn(CoroutineKind::Desugared(CoroutineDesugaring::Gen,"}]}
            ResumedAfterReturn(CoroutineKind::Desugared(CoroutineDesugaring::Gen, _)) => {
            }
                bug!("gen blocks can be resumed after they return and will keep returning `None`")