[Webkit-unassigned] [Bug 172739] New: Null pointer crash when handling async with arrow operator

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue May 30 16:31:53 PDT 2017


https://bugs.webkit.org/show_bug.cgi?id=172739

            Bug ID: 172739
           Summary: Null pointer crash when handling async with arrow
                    operator
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: natashenka at google.com

Created attachment 311551

  --> https://bugs.webkit.org/attachment.cgi?id=311551&action=review

script causing the crash

The following script crashes with a null pointer exception in JSC (also attached) .

class BaseClass {
  constructor(x) {

  }

};

class DeferredSuperCall extends BaseClass {
  constructor(x) {
    return async() => super(x);
  }
};

var q =  new DeferredSuperCall("LexicalSuperCall")();

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