// Copyright 2014 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

function runNearStackLimit(f) { function t() { try { t(); } catch(e) { f(); } }; try { t(); } catch(e) {} }
%OptimizeFunctionOnNextCall(__f_3);
function __f_3() {
    var __v_5 = a[0];
}
runNearStackLimit(function() { __f_3(); });
