Webpack-dev-server: Crashed in hot reload, version 3.3.0

[rohye]

• Operating System: MacOS
• Node Version: 10.15.2
• NPM Version: 6.4.1
• webpack Version: 4.28.2
• webpack-dev-server Version: 3.3.0

• [x] This is a bug
• [ ] This is a modification request

Code

Error

dev-server.js:9 Uncaught TypeError: Cannot read property 'indexOf' of undefined
    at upToDate (webpack:///(:8888/webpack)/hot/dev-server.js?:9:19)
    at EventEmitter.eval (webpack:///(:8888/webpack)/hot/dev-server.js?:53:8)
    at EventEmitter.emit (events.js:151)
    at reloadApp (webpack:///(:8888/webpack)-dev-server/client?:269:16)
    at Object.ok (webpack:///(:8888/webpack)-dev-server/client?:163:5)
    at SockJS.onmessage (webpack:///(:8888/webpack)-dev-server/client/socket.js?:40:25)
    at SockJS.EventTarget.dispatchEvent (sockjs.js:170)
    at eval (sockjs.js:887)
    at Array.forEach (<anonymous>)
    at SockJS._transportMessage (sockjs.js:885)
    at WebSocketTransport.EventEmitter.emit (sockjs.js:86)
    at WebSocketTransport.ws.onmessage (sockjs.js:2961)

dev-server.js:9

var upToDate = function upToDate() {
    return lastHash.indexOf(__webpack_require__.h()) >= 0;
};

Expected Behavior

HMR work correctly

Actual Behavior

Crashed in hot reload mode

For Bugs; How can we reproduce the behavior?

For Features; What is the motivation and/or use-case for the feature?

[hiroppy]

Please submit a reproducible repo.

[alexander-akait]

I think problem in stats (now we respect their from config, but looks we forget something defined)

[alexander-akait]

@bryfroze Anyway please create minimum reproducible test repo, thanks

[bazineta]

This seems as if it might be a regression, for which there was a previous fix, #1366. In our case at least, we typically have hash: false set in our stats options, and see this issue. Setting the hash flag to true resolves the issue.

[alexander-akait]

Yep, it is regression we already works on this

[livemixlove]

When will this fix be put into a release?

[alexander-akait]

yes

[sjelfull]

@livemixlove A release was tagged yesterday: https://github.com/webpack/webpack-dev-server/releases/tag/v3.3.1