undefined is not a function(evaluating '_this.registerEvents()')

[ericcumbee]

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• [X ] Search for existing issues: https://github.com/facebook/react-native/issues
• [X ] Use the latest React Native release: https://github.com/facebook/react-native/releases

Environment

React Native Environment Info:
    System:
      OS: Windows 10
      CPU: x64 Intel(R) Core(TM) i5-7300U CPU @ 2.60GHz
      Memory: 757.11 MB / 7.93 GB
    Binaries:
      Yarn: 1.9.4 - C:\Users\ecumb\AppData\Roaming\npm\yarn.CMD
      npm: 5.6.0 - C:\Program Files\nodejs\npm.CMD
    IDEs:
      Android Studio: Version  3.1.0.0 AI-173.4907809

Description

Reproducible Demo

Create RN project using react-native init using version 0.57.0-rc0
react-native run-android
kill the spawned bundler and relaunch using npm start to work around issue #20712

[dmead]

I have this exact error.

Worth mentioning that it's because i'm on 57-rc0 to escape the acessiblity bug in 56

Also worth mentioning that I'm here because 56 is the default configuration in webstorm.

Whats a stable version of react-native I can use to learn things?

[danielgindi]

I got this too. Replaced babel preset, deleted node_modules/.cache, nothing.

[donjo9]

Is this still a problem with rc2 ? because i used to have this issue, but dont with rc2

React Native Environment Info:
    System:
      OS: Windows 7
      CPU: x64 Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
      Memory: 1.09 GB / 11.92 GB
    Binaries:
      Yarn: 1.9.4 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
      npm: 6.1.0 - C:\Program Files\nodejs\npm.CMD
    IDEs:
      Android Studio: Version  1.5.0.0 AI-141.2456560

[danielgindi]

I do have this problem with rc2 (on macOS)

[kelset]

@danielgindi can you upload a repro? Just tested locally with the 0.57-branch (details here #20712 (comment) ) and I can't repro this issue.

[ericcumbee]

rc2 produces the same results on windows

[danielgindi]

@kelset well, creating a new project using react-native cli, then changing to 0.57.0-rc.2 and the new babel preset, results in a node_modules/react-native/index.js not found.
So I can't even get to that point where the _registerEvents is undefined.

In my own project, I tried to apply the commit for util/Config.js, then delete node_modules/.cache but that did not change anything.

[badaz]

Same problem here on 0.57.0-rc.2 build for android : _registerEvents is undefined

[donjo9]

What does the Metro instance output ?

[adam187]

Had same issue on macOS.
I resolved it with running react-native upgrade based on this https://facebook.github.io/react-native/docs/upgrading#alternative

[ericcumbee]

@donjo9 no errors reported on the metro instance just

 DELTA  [android, dev] ./index.js ░░░░░░░░░░░░░░░░ 0.0% (0/1)::ffff:127.0.0.1 - - [24/Aug/2018:18:16:37 +0000] "GET /index.delta?platform=android&dev=true&minify=false&deltaBundleId=a4271ccc904b5058 HTTP/1.1" 200 69 "-" "okhttp/3.10.0"
 DELTA  [android, dev] ./index.js ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ 100.0% (1/1), done.

[danielgindi]

Seems like rc-3 solves the issue

[tamirrab]

I still get the same message on rc-3 :(