[Webkit-unassigned] [Bug 166879] Calling async arrow function which is in a class's member function will cause error

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=166879

--- Comment #5 from shuan zhao <hszhsh at icloud.com> ---
I see this issue is solved, but there's another problem. I have updated the test code:

function runSomething(callback) {
    callback();
}

class Test {
    testFunc() {
        this.prop = "123";
        runSomething(async () => {
            console.log("callback " + this.prop); // It's ok here
            await sleep(2);
            console.log("callback end " + this.prop); // TypeError: undefined is not an object (evaluating 'this.prop')
        });
    }
}

let t = new Test();
t.testFunc();

Is it another bug? The code above is ok with V8.

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