[Bug 24141] New: Consider the interaction of ArrayClass and concat()

https://www.w3.org/Bugs/Public/show_bug.cgi?id=24141

            Bug ID: 24141
           Summary: Consider the interaction of ArrayClass and concat()
           Product: WebAppsWG
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: WebIDL
          Assignee: cam@mcc.id.au
          Reporter: Ms2ger@gmail.com
        QA Contact: public-webapps-bugzilla@w3.org
                CC: mike@w3.org, public-script-coord@w3.org

With ArrayClass,

  var x = document.querySelectorAll("*");
  var y = x.concat();

leads to y ≡ [x]. It seems like ES6 @@isConcatSpreadable can fix that.

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