syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // The signature should be `Future::poll(_, &mut Context<'_>) -> Poll<Output>`
context_before:                 hir::CoroutineKind::Desugared(hir::CoroutineDesugaring::Async, _) => {
context_after:                     assert_eq!(sig.yield_ty, tcx.types.unit);