{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"self.dcx().emit_err(errors::AttributesStartingWithRustcAreReserved"}]}
                self.dcx().emit_err(errors::AttributesStartingWithRustcAreReserved {
            if kind == MacroKind::Attr && segment.ident.as_str().starts_with("rustc") {
                    span: segment.ident.span,