fix(compiler-core): processExpression (root package)

[ubugeeei]

const _sfc_main = {
  setup(__props) {
    const router = useRouter();

    return function render(_ctx) {
      const _component_RouterView = _resolveComponent("RouterView");
      return _createElementVNode(_Fragment, null, [
        _createElementVNode("div", null, [
          "\n    ",
          _createElementVNode("nav", null, [
            "\n      ",
            _createElementVNode(
              "button",
              _normalizeProps({
                [_toHandlerKey("click")]: ($event) =>
                  _ctx.router.push("/"), // FIXME:
                  // .
                  // .