React: after upgarding to 16.8.2 - Getting error TypeError: Cannot set property 'props' of undefined PureComponent node_modules/react/cjs/react.development.js:394

[hardikb08]

Pls find screenshot for more details

Package.json

"@babel/core": "7.1.6",
"@svgr/webpack": "2.4.1",
"babel-core": "7.0.0-bridge.0",
"babel-eslint": "9.0.0",
"babel-jest": "23.6.0",
"babel-loader": "8.0.4",
"babel-plugin-named-asset-import": "^0.3.1",
"babel-preset-react-app": "^7.0.1",
"bfj": "6.1.1",
"bootstrap-daterangepicker": "^3.0.3",
"case-sensitive-paths-webpack-plugin": "2.1.2",
"chalk": "2.4.1",
"connected-react-router": "^6.3.1",
"css-loader": "1.0.0",
"dotenv": "6.0.0",
"dotenv-expand": "4.2.0",
"eslint": "^5.14.0",
"eslint-config-react-app": "^3.0.7",
"eslint-loader": "2.1.1",
"eslint-plugin-flowtype": "2.50.1",
"eslint-plugin-import": "2.14.0",
"eslint-plugin-jsx-a11y": "6.1.2",
"eslint-plugin-react": "7.11.1",
"exceljs": "^1.7.0",
"file-loader": "2.0.0",
"file-saver": "^2.0.1",
"fork-ts-checker-webpack-plugin-alt": "0.4.14",
"fs-extra": "7.0.0",
"history": "^4.7.2",
"html-webpack-plugin": "4.0.0-alpha.2",
"identity-obj-proxy": "3.0.0",
"immutable": "^4.0.0-rc.12",
"jest": "23.6.0",
"jest-pnp-resolver": "1.0.1",
"jest-resolve": "23.6.0",
"jquery": "^3.3.1",
"jquery-param": "^1.0.1",
"mini-css-extract-plugin": "0.4.3",
"moment": "^2.24.0",
"normalize.css": "^8.0.1",
"optimize-css-assets-webpack-plugin": "5.0.1",
"pnp-webpack-plugin": "1.1.0",
"postcss-flexbugs-fixes": "4.1.0",
"postcss-loader": "3.0.0",
"postcss-preset-env": "6.3.1",
"postcss-pxtorem": "^4.0.1",
"postcss-safe-parser": "4.0.1",
"prop-types": "^15.7.2",
"query-string": "^6.2.0",
"react": "^16.8.2",
"react-app-polyfill": "^0.2.1",
"react-bootstrap": "^0.32.4",
"react-bootstrap-daterangepicker": "^4.1.0",
"react-dev-utils": "^7.0.3",
"react-dom": "^16.8.2",
"react-dropzone": "^8.1.0",
"react-infinite-scroller": "^1.2.4",
"react-redux": "^6.0.0",
"react-router": "^4.3.1",
"react-router-dom": "^4.3.1",
"react-slick": "^0.23.2",
"react-toastify": "^4.5.2",
"redux": "^4.0.1",
"redux-actions": "^2.6.4",
"redux-define": "^1.1.1",
"redux-form": "^8.1.0",
"redux-immutable": "^4.0.0",
"redux-logger": "^3.0.6",
"redux-starter-kit": "^0.3.3",
"redux-thunk": "^2.3.0",
"resolve": "1.8.1",
"sass-loader": "7.1.0",
"style-loader": "0.23.0",
"styled-components": "^4.1.3",
"terser-webpack-plugin": "1.1.0",
"url-loader": "1.1.1",
"webpack": "4.19.1",
"webpack-dev-server": "^3.1.14",
"webpack-manifest-plugin": "2.0.4",
"whatwg-fetch": "^3.0.0",
"workbox-webpack-plugin": "3.6.3",
"xlsx": "^0.14.1"

[hardikb08]

understood

[threepointone]

can't say much without a reproducible demo, please use codesandbox or something similar to share a small version of this failure. at a glance, this looks like an issue with react-redux, but I can't comment more without seeing a working demo. I'd recommend you post this issue at https://github.com/reduxjs/react-redux/issues instead

[JustJacqui]

I am having the same issue.

I use c9 and then generate the default react app using
npx create-react-app nameofapp

My node and npm versions are up-to-date and I change nothing in the code. I just run it from what is generated.

Bad timing as I need this for an assignment and don't know enough to make one from scratch :(

[NeilHaff]

I put a typo style error in a class based component such as-
class App extends Component () {
instead it should obviously be-
class App extends Component {
Which causes this error.

[threepointone]

I'm going to close this issue, but I'd be happy to reopen if someone can provide a reproducing example on codesandbox, or as a git repo.

[kt995]

I put a typo style error in a class based component such as-
class App extends Component () {
instead it should obviously be-
class App extends Component {
Which causes this error.

@NeilHaff omg you're the best, this is such a dumb error but I couldn't figure it out thank you! :)