{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"///"}]}
/// `infcx.f()?;` you'll get a warning about the obligations being discarded
/// `InferCtxt::f` that returns `InferResult<'tcx, ()>` and you call it with
/// without use, which is probably unintentional and has been a source of bugs