syntax_data: {"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"CoroutineKind::Coroutine(_)"}]}
source_snippet:             CoroutineKind::Coroutine(_) => span_bug!(body.span, "`Coroutine`s cannot be fused"),
context_before:             }
context_after:             // `gen` continues return `None`