Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/dom/xhr/tests/test_bug1752863_worker.js b/dom/xhr/tests/test_bug1752863_worker.js
new file mode 100644
index 0000000000..196b825c0c
--- /dev/null
+++ b/dom/xhr/tests/test_bug1752863_worker.js
@@ -0,0 +1,34 @@
+var xhr;
+var myself;
+
+async function handleLoadstart() {
+  try {
+    xhr.open("POST", "FOOBAR", false);
+    // This will potentially queue another "loadstart" event
+    // before we can catch (err). But the order should be
+    // guaranteed, that is the first postMessage arriving at
+    // our parent is from the first catch (err).
+    xhr.send();
+    myself.postMessage("MissingError");
+  } catch (err) {
+    if (err instanceof DOMException) {
+      // This is what we expect to happen on the first error
+      // and the parent will check for this to arrive.
+      myself.postMessage("DOMException");
+    } else {
+      myself.postMessage("OtherError");
+    }
+    // Let's ensure we still bail out from the processing.
+    xhr.removeEventListener("loadstart", handleLoadstart, true);
+    throw err;
+  }
+}
+
+self.onmessage = async function (ev) {
+  xhr = new XMLHttpRequest({ mozAnon: false });
+  myself = self;
+  xhr.addEventListener("loadstart", handleLoadstart, true);
+  xhr.open("POST", "FOOBAR", false);
+  xhr.send();
+  postMessage("TERMINATE");
+};