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<!DOCTYPE html>
<meta charset="utf-8">
<title>The infinite pattern validation test</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<input type=text id=badinput value="12345678901234567890123456789123456789z" pattern="(\d+)*$">
<script>
test(function(){
var elements = document.querySelectorAll(":invalid");
assert_array_equals(elements, [document.getElementById('badinput')]);
}, "Infinite backtracking pattern terminates");
</script>
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