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A comment on Twitter crashes itself with commas. Parent comment

Re:Twitter crashes itself with commas by bmuon on Tuesday July 17, 2012 @02:08PM (#4256942)
Strict mode should save you from a lot of those.

    (function () {
      'use strict';
      var a = 1; b = 2;
    }());
    // ReferenceError: b is not defined
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