{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"CastError::IntToWideCast(known_metadata)"}]}
            CastError::IntToWideCast(known_metadata) => {
            }
                let expr_if_nightly = fcx.tcx.sess.is_nightly_build().then_some(self.expr_span);