undefined `this` when running ParseQuery with `.first`

[ranby]

New Issue Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.
• I can reproduce the issue with the latest versions of Parse Server and the Parse JS SDK.

Issue Description

When running a Parse.Query with .first(), I get an error like TypeError: Cannot read properties of undefined (reading 'className') at eval (ParseQuery.js:1523:39)

Parse.Query with .find works fine.
This seem to have broke in v3.5.0. Earlier versions work fine for me.

After digging into the source code a bit it looks like this in ParseQuery.js gets modified to undefined after QueryController has ran the async query request.

Steps to reproduce

Run a query like

const result = await new Parse.Query('Item').equalTo('objectId', '1234567890').first()
console.log({ result })

Actual Outcome

A runtime error is thrown (see Logs section)

Expected Outcome

Expected result would be an Parse.Object with the specified objectId or undefined

Environment

Client

• Parse JS SDK version: 3.5.0

Logs

Complete error:

TypeError: Cannot read properties of undefined (reading 'className')
    at eval (ParseQuery.js:1523:39)

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[dblythy]

3.5.0 is broken, please see #1600.

Can you try 3.5.1-alpha.2 or revert to 3.4.4

[ranby]

Aaah thank you @dblythy! 3.5.1-alpha.2 works!

I would have saved a lot of time if I just had looked through closed issues as well 😅

[dblythy]

Closing as fixed via #1600