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function f() {}
var fn = f;
for (var i = 0; i < 100000; ++i) {
fn = fn.bind();
// Ensure we don't fallback to @@hasInstance from %FunctionPrototype%.
Object.defineProperty(fn, Symbol.hasInstance, {
value: undefined, writable: true, enumerable: true, writable: true
});
// Prevent generating overlong names of the form "bound bound bound [...] f".
Object.defineProperty(fn, "name", {
value: "", writable: true, enumerable: true, writable: true
});
}
assertThrowsInstanceOf(
() => ({}) instanceof fn,
Error,
"detect runaway recursion delegating instanceof to bound function target");
reportCompare(0, 0);