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Test Info: Warnings

<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<iframe id="i" src="/common/blank.html"></iframe>
<script>
test(t => {
let assertionHappened = false;
navigation.onnavigate = t.step_func_done(e => {
e.preventDefault();
assert_throws_dom("InvalidStateError", () => e.intercept());
assertionHappened = true;
});
location.href = "#1";
assert_true(assertionHappened);
}, "event.intercept() throws if used on a canceled event");
</script>