Cannot read property 'displayName' of null

[tannera]

Since upgrade to RN 0.57.5 and the latest React, the following issue arose upon running React Native Debugger and starting the App:

ExceptionsManager.js:84 Warning: React DevTools encountered an error: TypeError: Cannot read property 'displayName' of null.

I believe it is linked to facebook/react-devtools#1195 and facebook/react-devtools#1168

React Native Debugger app version: 0.8.1
React Native version: 0.57.5
Platform: iOS AND Android
Is real device of platform: Simulator and Real device in debug mode
Operating System: macOS

[phil-flyclops]

I'm encountering the same issue

[phil-flyclops]

As a heads up, I did a local build with the version of react devtools upgraded to 3.4.2 in line with part of the discussion in infacebook/react-devtools#1168 and it did not resolve the issue

[owinter86]

Also as a heads up, This error only occurs with React Devtools toggled, so disabling that will still allow you to use the developer tools and Redux Devtools. I can also confirm upgrading react devtools does not solve this issue.

[dan-lee]

I don't fully understand where a fix has to be deployed, but is there anything we could do on our end?
Because that bug is currently blocking me (and probably others) using this very useful app.

[phil-flyclops]

I just upgraded to React Native v0.57.7 from 0.57.5 and the problem self resolved