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// Removing and re-adding entries while an iterator is live causes the iterator to visit them again.
var map = new Map([['a', 1]]);
var n = 5;
for (let [k, v] of map) {
assertEq(k, 'a');
assertEq(v, 1);
if (n === 0)
break;
map.delete('a');
map.set('a', 1);
n--;
}
assertEq(n, 0);
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