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var returnInvalid = false;
const iterable = {
[Symbol.iterator]() {
return {
i: 0,
next() {
return { value: this.i++, done: false }
},
return() {
if (returnInvalid) {
// Invalidate Ion scripts.
gc(closeIter, 'shrinking');
return undefined;
}
return { value: "return", done: true };
}
};
}
}
function closeIter(o) {
for (var x of o) {
if (x == 2) {
break;
}
}
}
function test() {
with ({}) {}
for (var i = 0; i < 100; i++) {
closeIter(iterable);
}
returnInvalid = true;
var caught = false;
try {
closeIter(iterable);
} catch {
caught = true;
}
assertEq(caught, true);
returnInvalid = false;
}
with ({}) {}
test();
// Force an IC in Ion.
closeIter([1,2,3,4,5]);
test();