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var map = new WeakMap();
var sym = Symbol();
try {
map.set(sym, 1);
} catch (e) {
assertEq(!!e.message.match(/an unregistered symbol/), false);
}
var map = new WeakMap();
var sym = Symbol();
try {
map.set(sym, 1);
} catch (e) {
assertEq(!!e.message.match(/an unregistered symbol/), false);
}