cypress: 3.1.1 regression: cookie can't be set when visiting local devserver

I was just following the tutorial and trying to setup simple tests for our app and an error stopped me.

Current behavior:

The very simple test case:

describe("Login", function() {
  it("Goes to login page", function() {
    cy.visit("https://localhost:8443");
  });
});

Generates the following error in the test runner:

CypressError: cy.visit() failed trying to load:

https://localhost:8443/

We attempted to make an http request to this URL but the request failed without a response.

We received this error at the network level:

  > TypeError: Cannot set property 'url' of undefined

Common situations why this would fail:
  - you don't have internet access
  - you forgot to run / boot your web server
  - your web server isn't accessible
  - you have weird network configuration settings on your computer

The stack trace for this error is:

TypeError: Cannot set property 'url' of undefined
    at Object.setCookie (/Users/koen/Library/Caches/Cypress/3.1.1/Cypress.app/Contents/Resources/app/packages/server/lib/request.js:91:20)
    at addCookie

Desired behavior:

I want Cypress to open my page so I can start writing tests 😄

Steps to reproduce:

1. Add Cypress to a project or create a Cypress project
2. Just add a single file with the test case above
3. Run the test runner with that test.

Reproduce is probably going to be hard, because visiting a production version of our app with Cypress worked correctly.

Versions

• Cypress: 3.1.1
• Chrome: 70
• OS: macOS High Sierra

Workaround

I first asked a question about this on the Gitter channel and downgrading to 3.1.0 made the test case above work and my page was loaded correctly.

Extra

I think something goes wrong here: request.coffee