syntax_data: {"ast_node_type":"other","tokens":[{"end":23,"kind":"keyword","start":0,"text":")"}]}
source_snippet:                     ) {
context_before:                         hir::CoroutineKind::Desugared(hir::CoroutineDesugaring::Async, _)
context_after:                         diag.note("a recursive `async fn` call must introduce indirection such as `Box::pin` to avoid an infinitely sized future");