Uncaught TypeError: Cannot read property 'apply' of undefined

[Versifiction]

I have the error below when I want to do some tests, it's because Redux but I can't disabled or turn off the uncaught exception

You can fork https://github.com/Versifiction/ofilms or clone the repo -> npm install -> npm start

I tried with the version 3.4.1 of Cypress and Chrome 77

**Uncaught TypeError: Cannot read property 'apply' of undefined**
**This error originated from your application code, not from Cypress.**
**When Cypress detects uncaught errors originating from your application it will automatically fail the current test.**
**This behavior is configurable, and you can choose to turn this off by listening to the 'uncaught:exception' event.**
**https://on.cypress.io/uncaught-exception-from-application**

The content of the file which creates an error in Cypress :

import { createStore, applyMiddleware, compose } from "redux";
import thunk from "redux-thunk";
import rootReducer from "./reducer";
const initialState = {};
const middleware = [thunk];
const store = createStore(
  rootReducer,
  initialState,
  compose(
    applyMiddleware(...middleware),
    window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__()
  )
);
export default store;

[jennifer-shehane]

@Versifiction What happens when you turn off failing the test during uncaught exceptions? https://on.cypress.io/catalog-of-events#Uncaught-Exceptions

[Versifiction]

@Versifiction What happens when you turn off failing the test during uncaught exceptions? https://on.cypress.io/catalog-of-events#Uncaught-Exceptions

@jennifer-shehane I turned it off, but it's like it's still on..

Here's my cypress/support/index.js file :

Cypress.on("uncaught:exception", (err, runnable) => {
  // returning false here prevents Cypress from
  // failing the test
  return false;
});

Cypress.on("fail", (error, runnable) => {
  debugger;

  // we now have access to the err instance
  // and the mocha runnable this failed on

  throw error; // throw error to have test still fail
});

[jennifer-shehane]

This is likely a duplicate of #987 with the uncaught exception being thrown from 3rd party code.

I will try to run the example against that PR to see if it is fixed. #5249

[jennifer-shehane]

@Versifiction I pulled down the repo provided and added the test below, with the uncaught exception handler. The test does indeed pass when given the uncaught:exception handler. Please use this as a workaround.

If this is not the error you were encountering, then provide the full set of tests please to reproduce.

support/index.js

Cypress.on("uncaught:exception", (err, runnable) => {
  // returning false here prevents Cypress from
  // failing the test
  return false;
});

spec.js

it('works', () => {
  cy.visit("http://localhost:3000")
})