syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"span_bug!(body.span,"}]}
source_snippet:                 span_bug!(body.span, "`Future`s are not fused inherently")
context_before:             CoroutineKind::Desugared(CoroutineDesugaring::Async, _) => {
context_after:             }