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<!DOCTYPE html>
<meta charset="utf-8">
<title>Check for crashes when a whenDefined promise resolving re-entries</title>
<meta name="author" href="mailto:xiaochengh@chromium.org">
<link rel="help" href="https://html.spec.whatwg.org/multipage/custom-elements.html#custom-elements-api">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1366813">
<script>
class CustomElement extends HTMLElement {}
Object.prototype.__defineGetter__("then", main);
let depth = 0;
function main() {
if (depth > 1) return;
++depth;
customElements.whenDefined("custom-a"); // Causes re-entry of main()
try { customElements.define("custom-a", CustomElement) } catch (e) {}
customElements.whenDefined("custom-b");
--depth;
}
main();
</script>
Test passes if it does not crash.
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