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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Calling async arrow function which is in a class's member function will cause error"
href="https://bugs.webkit.org/show_bug.cgi?id=166879#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Calling async arrow function which is in a class's member function will cause error"
href="https://bugs.webkit.org/show_bug.cgi?id=166879">bug 166879</a>
from <span class="vcard"><a class="email" href="mailto:gskachkov@gmail.com" title="GSkachkov <gskachkov@gmail.com>"> <span class="fn">GSkachkov</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=166879#c5">comment #5</a>)
<span class="quote">> 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.</span >
Yeah, unfortunately it is another bug. Async arrow function 'lost' _this_, by some reason, during restore state after await.</pre>
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