[Webkit-unassigned] [Bug 155060] New: Second call to super() should fail

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Mar 4 20:07:18 PST 2016


https://bugs.webkit.org/show_bug.cgi?id=155060

            Bug ID: 155060
           Summary: Second call to super() should fail
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rniwa at webkit.org
                CC: ggaren at apple.com, keith_miller at apple.com,
                    sbarati at apple.com, utatane.tea at gmail.com

class A { }
class B extends A { constructor() { super(); console.log('hi'); super(); } }

should fail immediately after 'hi' since "this" is already created.

Specifically, step 10 in SuperCall:
http://www.ecma-international.org/ecma-262/6.0/#sec-super-keyword-runtime-semantics-evaluation

10. Return thisER.BindThisValue(result).

should throw a ReferenceError because of step 3:
http://www.ecma-international.org/ecma-262/6.0/#sec-bindthisvalue

3. If envRec.[[thisBindingStatus]] is "initialized", throw a ReferenceError exception.

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