test/mjsunit/regress/regress-crbug-280333.js

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// Flags: --allow-natives-syntax

function funky() { return false; }
var global;

function foo(x, fun) {
  var a = x + 1;
  var b = x + 2;  // Need another Simulate to fold the first one into.
  global = true;  // Need a side effect to deopt to.
  if (fun()) {
    return a;
  }
  return 0;
}

assertEquals(0, foo(1, funky));
assertEquals(0, foo(1, funky));
%OptimizeFunctionOnNextCall(foo);
assertEquals(0, foo(1, funky));
assertEquals(2, foo(1, function() { return true; }));