ReactNativeでiOSのリリースのビルドでエラー

undefined is not a function (near '...babelHelpers.applyDecoratedDescriptor...')

<unknown>
    main.jsbundle:112024:60
loadModuleImplementation
    main.jsbundle:180:14
<unknown>
    main.jsbundle:73667:70
loadModuleImplementation
    main.jsbundle:180:14
<unknown>
    main.jsbundle:1719:60
loadModuleImplementation
    main.jsbundle:180:14
guardedLoadModule
    main.jsbundle:94:47
global code
    main.jsbundle:112060:4

なぜか？

https://github.com/facebook/react-native/issues/19955#issuecomment-421295617

.babelrcの中身

{
  plugins: [
    ['@babel/plugin-proposal-decorators', {legacy: true}],
    ["@babel/plugin-transform-runtime", { "helpers": true }] # これ追加してみた
  ],
  "presets": ["module:metro-react-native-babel-preset"]
}

これやったり

yarn add @babel/plugin-transform-runtime --dev
yarn add @babel/runtime --dev

package.jsonの中身.

    "@babel/plugin-transform-runtime": "^7.1.0",
    "@babel/runtime": "^7.1.2",

これやったり yarn add babel-plugin-transform-inline-environment-variables --dev

package.json.

    "babel-plugin-transform-inline-environment-variables": "^0.4.3",

だめ

HTTP load failed (error code: -999 [1:89])

のログが出てるのも気になる・・・・