[ButtonBase] Regression in 3.1.2 causes error "Cannot read property 'focusVisible' of null"

For whatever reason, upgrading from 3.1.1 to 3.1.2 causes my app to stop functioning. The full error message that I’m receiving:

TypeError: Cannot read property ‘focusVisible’ of null at getDerivedStateFromProps (ButtonBase.js:353) at wi (vendor.js:55) at Ni (vendor.js:55) at Qi (vendor.js:55) at Zi (vendor.js:55) at Co (vendor.js:55) at Lo (vendor.js:55) at la (vendor.js:55) at ua (vendor.js:55) at ko (vendor.js:55)

Updating getDerivedStateFromProps like so fixes the issue: https://github.com/alexplumb/material-ui/commit/40c82b80bcec82307691c936554925a09c37c6c2

• This is not a v0.x issue.
• I have searched the issues of this repository and believe that this is not a duplicate.

Expected Behavior

Including Button, IconButton, or ButtonBase in my application should display the specified button.

Current Behavior

A white screen appears and the error in the title appears in the console log

Steps to Reproduce

Unable to reproduce in a code sandbox or create-react-app. Seems to only happen in my own environment.

Context

Your Environment

Tech	Version
Material-UI	3.1.2
React	16.5.2
Redux	4.0.1
Browser	Chrome 69.0.3497.81

[alexplumb]

I was able to resolve it by deleting my node_modules folder, package-lock.json, and re-running npm install in my project. The fix ended up being pretty simple but the bug seems to be pretty pervasive - I think it would be wise to add a check to these getDerivedStateFromProps calls anyway.

[zsalzbank]

Huh - totally missed that - my bad. If I read more closely, I would have saved hours of debugging. Oh well, good experience learning react internals.