{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"self.dcx().emit_err(errors::AbiMustNotHaveReturnType"}]}
                                self.dcx().emit_err(errors::AbiMustNotHaveReturnType {
                            if let FnRetTy::Ty(ref ret_ty) = sig.decl.output {
                                    span: ret_ty.span,