react-devtools 3.5.0 breaks new project

reactDevTools.connectToDevTools is not a function

## Environment
  React Native Environment Info:
    System:
      OS: macOS High Sierra 10.13.6
      CPU: (8) x64 Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz
      Memory: 833.36 MB / 16.00 GB
      Shell: 5.3 - /bin/zsh
    Binaries:
      Node: 8.15.0 - /usr/local/bin/node
      Yarn: 1.12.3 - /usr/local/bin/yarn
      npm: 6.4.1 - /usr/local/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 12.1, macOS 10.14, tvOS 12.1, watchOS 5.1
      Android SDK:
        API Levels: 22, 23, 24, 25, 26, 27, 28
        Build Tools: 23.0.1, 23.0.2, 23.0.3, 24.0.1, 25.0.0, 25.0.2, 25.0.3, 26.0.1, 26.0.2, 26.0.3, 27.0.3, 28.0.2
        System Images: android-25 | Google APIs Intel x86 Atom, android-27 | Google APIs Intel x86 Atom, android-28 | Google APIs Intel x86 Atom, android-28 | Google APIs Intel x86 Atom_64
    IDEs:
      Android Studio: 3.1 AI-173.4907809
      Xcode: 10.1/10B61 - /usr/bin/xcodebuild
    npmPackages:
      react: 16.6.3 => 16.6.3
      react-native: 0.57.8 => 0.57.8
    npmGlobalPackages:
      react-native-cli: 2.0.1
      react-native-create-library: 3.1.2
      react-native-debugger-open: 0.3.17
      react-native-git-upgrade: 0.2.7
      react-native-update-cli: 0.1.0

Description

Reproducible Demo

Just init a new project and you’ll hit this issue

Workaround

Put the following in your package.json and run yarn (not npm, which does not support “resolutions”) to force install the previous version:

  "resolutions": {
    "react-devtools-core": "3.4.3"
  }

Then close the current packager window, run yarn start --reset-cache.

Since the compiled js file changed a lot and we actually got an empty object in setupDevtools.js, so I suspect that something went wrong with build configuration, maybe related to https://github.com/facebook/react-devtools/commit/28d36a228de7ff8d72665f3c6a1b8f11ad7e94b6

cc @bvaughn @kelset @hramos

[jamonholmgren]

I would recommend rolling back to react-devtools-core@3.4.3. I was able to do this and it worked.

yarn add --dev react-devtools-core@3.4.3
or
npm install --save-dev react-devtools-core@3.4.3

I will note that this happened on a brand-new 0.57.7 project also.

[bvaughn]

Hi all 👋 Sorry for the trouble 😦

I believe this was something I broke when upgrading the React DevTools project’s Babel and Webpack versions in https://github.com/facebook/react-devtools/pull/1235, and we’re just now encountering it because we haven’t released the react-devtools-core package since then.

I just published react-devtools-core v3.5.1. Can anyone let me know if this resolves the issue? (I’m unable to repro the original reported issue so it’s hard for me to verify the fix.)