v8/test/mjsunit/compiler/regress-628403.js

// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Flags: --allow-natives-syntax

var dothrow = false;

function g() {
  if (dothrow) throw 1;
}

function f(a) {
  try {
    g();
  } catch(e) {
    if (typeof e !== 'number' && e !== 1) throw e;
    return a[0];
  }
}

%NeverOptimizeFunction(g);
%PrepareFunctionForOptimization(f);
f();
f();
%OptimizeFunctionOnNextCall(f);
dothrow = true;
assertEquals(42, f([42]));