{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"self.dcx().emit_err(errors::RustcLegacyConstGenericsIndex"}]}
            self.dcx().emit_err(errors::RustcLegacyConstGenericsIndex {
        if list.len() != generics.params.len() {
                attr_span: attr.span(),