`Cypress.Commands.overwrite` doesn't pass down the context

[x-yuri]

Current behavior:

Cypress.Commands.overwrite('then', function(originalCommand, subject, fn, options = {}) {
    return originalCommand.call(this, subject, options, fn);
});
 
specify('aliases work', function () {
    cy.wrap(1).as('myAlias');
    cy.wrap(2).then(function(subj) {
        expect(this.myAlias).to.eq(1); // undefined
    });
});

Desired behavior:

The test succeeds.

Steps to reproduce: (app code and test code)

https://github.com/x-yuri/issues/tree/cypress-overwrite

More info

Cypress.Commands.overwrite() is used by cypress-commands package. Is there a possibly better way to change then() command?

Versions

Cypress 3.4.0, Arch Linux, Electron 61

[Lakitna]

Pinging @jennifer-shehane as this has not been answered within a month :)

[bahmutov]

Good:

Broken: