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function fn() {
var map = new Map(),
set = new Set(),
key = {};
for (var i = 0; i < 500; i++) {
map.set(i, i);
set.add(i);
}
map.set(key, 'bar');
set.add(key);
return map.has(key) && set.has(key);
}
assertEqual(fn(), true);
test(fn);