Do not create a promise from an uncatchable exception

saschanaz · SkyBlack1225 · commit 499019927493 · 2024-01-23T05:01:51.000+08:00
Differential Revision: https://phabricator.services.mozilla.com/D172654 bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1821563 gecko-commit: 703562db4aa2be8ae07f1edc22a0a9ed3ed42dec gecko-reviewers: mgaudet
diff --git a/encoding/streams/stringification-crash.html b/encoding/streams/stringification-crash.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html class="test-wait">
+<script id="workerScript" type="text/worker">
+  // Blob will pass a huge Uint8Array object whose stringification will take long
+  const encoder = new TextEncoderStream()
+  const blob = new Blob([new ArrayBuffer(1338720)])
+  const writable = new WritableStream()
+  blob.stream().pipeThrough(encoder).pipeTo(writable)
+  // Wait a bit for the piping to start
+  Promise.resolve().then(() => postMessage('started'));
+</script>
+<script>
+  const worker = new Worker(URL.createObjectURL(new Blob([
+    document.getElementById("workerScript").textContent
+  ])))
+  worker.onmessage = () => {
+    worker.terminate();
+    document.documentElement.classList.remove("test-wait");
+  };
+</script>
