v8/test/mjsunit/regress/regress-1521.js

// Copyright 2011 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
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//
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//
// Flags: --allow-natives-syntax

// Optimized variable access inside through a catch context should work.
function test(x) {
  try {
    throw new Error();
  } catch (e) {
    var y = {f: 1};
    var f = function () {
      var z = y;
      var g = function () {
        if (y.f === z.f) return x;
      };
      %OptimizeFunctionOnNextCall(g);
      return g;
    }
    assertEquals(3, f()());
  }
}

test(3);