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var objectProxy = new Proxy({}, {});
var functionProxy = new Proxy(function() {}, {});
assertEq(Object.prototype.toString.call(objectProxy), '[object Object]');
assertEq(Object.prototype.toString.call(functionProxy), '[object Function]');
try {
Function.prototype.toString.call(objectProxy);
assertEq(true, false);
} catch (e) {
assertEq(!!/incompatible/.exec(e), true);
}