React-redux: Uncaught TypeError: Cannot read property 'displayName' of undefined

[ffxsam]

disregard

[zedd45]

For future reference for people who come here, this is possibly related to imports being malformed.

In my specific case, it was the import {x as y} syntax that Babel 6 wasn't liking.

[totymedli]

I got this error because I accidentally added parentheses after my class decorator:

@withRouter() // Don't write parentheses here!
@connect(null, { loginUser })
class Login extends React.Component { ... }

The way to write it is just @withRouter.