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https://github.com/LadybirdBrowser/ladybird
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d065f6bf00
The HTML event loop spec explicitly provides guidance for reentrancy in the "perform a microtask checkpoint" algorithm, so we cannot VERIFY for empty execution context before this early exit (as much as we'd like to). https://html.spec.whatwg.org/multipage/webappapis.html#perform-a-microtask-checkpoint See the microtask-checkpoint-reentrancy-via-responsexml-script test for an example of how this can happen from user scripts.
25 lines
601 B
HTML
25 lines
601 B
HTML
<!DOCTYPE html>
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<script src="../include.js"></script>
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<script>
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asyncTest(done => {
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const xhr = new XMLHttpRequest();
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xhr.responseType = "document";
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xhr.open(
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"GET",
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"data:text/xml,<root xmlns:h='http://www.w3.org/1999/xhtml'><h:script>void 0</h:script></root>",
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true
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);
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xhr.addEventListener("load", () => {
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queueMicrotask(() => {
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void xhr.responseXML;
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println("PASS (didn't crash)");
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done();
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});
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});
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xhr.send();
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});
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</script>
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