{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"sess.dcx().emit_warn(errors::ForbiddenCTargetFeature"}]}
                            sess.dcx().emit_warn(errors::ForbiddenCTargetFeature {
                        if let Err(reason) = stability.toggle_allowed() {
                                feature: base_feature,