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gczeal(4);
let a = "x".repeat(100);
for (let i = 0; i < 50; i++) {
let s = new String(a);
s.a = 0;
s.b = 0;
delete s.a;
Object.keys(s);
}
gczeal(4);
let a = "x".repeat(100);
for (let i = 0; i < 50; i++) {
let s = new String(a);
s.a = 0;
s.b = 0;
delete s.a;
Object.keys(s);
}