[Webkit-unassigned] [Bug 143012] New: ES6: Classes: Early return in sub-class constructor results in returning undefined instead of instance

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=143012

            Bug ID: 143012
           Summary: ES6: Classes: Early return in sub-class constructor
                    results in returning undefined instead of instance
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joepeck at webkit.org
                CC: ggaren at apple.com, rniwa at webkit.org, timothy at apple.com

* SUMMARY
Early return in sub-class constructor results in returning undefined instead of instance

* TEST
<script>
class Base { constructor(){ return; } }
class Derived extends Base {
    constructor()
    {
        super();

        // This early return breaks things.
        return;
    }
}

var x = new Derived;
console.log(x); // undefined, should be new Derived.
</script>


* EXPECTED
Derived instance in `x`.

* ACTUAL
undefined in `x`.

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