cy.intercept fails to respond with JSON containing tilde (~) in string property

[LoaderB0T]

Current behavior

When intercepting a request and responding with a JSON that contains a tilde an error is thrown.

cy.intercept("GET", "localhost/123", (res) => {
      res.reply({
        bla: "~",
      });
    });

VM263:1 Uncaught (in promise) SyntaxError: Unexpected token x in JSON at position 9

This seems to be a regression in 9.1.0, in 9.0.0 this executes just fine.

Desired behavior

No error, the response contains the correct object with a tilde.

Test code to reproduce

Repro repo: https://github.com/LoaderB0T/cypress-tilde-regression

Cypress Version

9.1.0

Other

No response

[LoaderB0T]

Probably related to #19170

[chrisbreiding]

This seems to be a regression in 9.1.0.

Similar issues using different commands:

• Cypress 9.1 open wrong URL when there is a ~ (tilde) in the link #19083
• Cypress 9.1 appears to mishandle POST content with special characters #19084
• Bad body encoding in cy.request #19115
• setCookies is broken since 9.0.0. ~ is converted to \x7e  #19096

[cypress-bot]

The code for this is done in cypress-io/cypress#19239, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

Released in 9.1.1.

This comment thread has been locked. If you are still experiencing this issue after upgrading to
Cypress v9.1.1, please open a new issue.