[Webkit-unassigned] [Bug 166879] New: 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

            Bug ID: 166879
           Summary: Calling async arrow function which is in a class's
                    member function will cause error
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: hszhsh at icloud.com

The test code is as follows. When I run the code, I got the error “Can't find private variable: @derivedConstructor”.

function doSomething(callback) {
    callback();
}

class Test {
    testFunc() {
        doSomething(async () => {
            console.log("testFunc");
            await sleep(2);
            console.log("testFunc end");
        });
    }
}

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

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