v8/test/mjsunit/regress/regress-1563.js

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// Flags: --allow-natives-syntax

obj = new Uint8ClampedArray(10);

// Test that undefined gets properly clamped in Crankshafted pixel array
// assignments.
function set_pixel(obj, arg) {
  obj[0] = arg;
};
%PrepareFunctionForOptimization(set_pixel);
set_pixel(obj, 1.5);
set_pixel(obj, NaN);
%OptimizeFunctionOnNextCall(set_pixel);
set_pixel(obj, undefined);
set_pixel(obj, undefined);

assertEquals(0, obj[0]);