Function attempt

test/json3.js:57–65

(func, errorFunc)

    // Internal: Contains `try...catch` logic used by other functions.
    // This prevents other functions from being deoptimized.
    function attempt(func, errorFunc) {
      try {
        func();
      } catch (exception) {
        if (errorFunc) {
          errorFunc();
        }
      }
    }

    // Test the `Date#getUTC*` methods. Based on work by @Yaffle.
    var isExtended = new Date(-3509827334573292);