get helper not working on promise proxy arrays

[amk221]

🐞 Describe the Bug

get helper not working with promise proxy arrays

🔬 Minimal Reproduction

https://ember-twiddle.com/75a0587be8b073980c040acb94542c68?openFiles=templates.application%5C.hbs%2C

😕 Actual Behavior

Does not return item from array

🤔 Expected Behavior

Expecting item from array to be returned

🌍 Environment

• Ember: 4.12
• Node.js/npm: 18.16 / 9.5.1
• OS: mac
• Browser: chrome

➕ Additional Context

I was trying to action this lint warning:

Array prototype extension property firstObject usage is disallowed. Please use Ember's get helper instead. e.g. {{get @list '0'}} (fixable)ember-template-lintno-array-prototype-extensions

[amk221]

I suppose it may not actually a bug, if I were to use firstObject.

Perhaps it's the lint rule that is wrong?

[kategengler]

firstObject is part of the array prototype extensions that were deprecated in 3.x with https://rfcs.emberjs.com/id/0848-deprecate-array-prototype-extensions/ so the lint is correct.