Next.js: PropTypes error in production

Created on 23 May 2017 · 7Comments · Source: vercel/next.js

I get this error when I run next build && NODE_ENV=production node server.js (my app uses a simple Express server for custom routing):

Uncaught TypeError: Cannot read property 'PropTypes' of undefined

The app runs fine in dev mode (with command nodemon server.js). I have switched to importing PropTypes from the prop-types package instead of from React, so (I think) that's not the problem.

I'm using Flow for the vast majority of my type checking - I only use PropTypes for context, in this HOC component and this other component.

Next version: 2.3.1
React: 15.4.2
Full stack trace (unfortunately not very useful because the code is minified in production):

Uncaught TypeError: Cannot read property 'PropTypes' of undefined
    at Object.o.23.113 (app.js:185)
    at a (app.js:185)
    at app.js:185
    at Object.o.38.113 (app.js:185)
    at a (app.js:185)
    at app.js:185
    at Object.o.31.10 (app.js:185)
    at a (app.js:185)
    at app.js:185
    at Object.o.47.1 (app.js:185)

I've been stuck trying to figure this out for a couple days, so any help would be greatly appreciated. Thanks in advance!

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