From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 dom/workers/test/recursion_worker.js | 46 ++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 dom/workers/test/recursion_worker.js

(limited to 'dom/workers/test/recursion_worker.js')

diff --git a/dom/workers/test/recursion_worker.js b/dom/workers/test/recursion_worker.js
new file mode 100644
index 000000000..1a61ec9d1
--- /dev/null
+++ b/dom/workers/test/recursion_worker.js
@@ -0,0 +1,46 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// This function should never run on a too much recursion error.
+onerror = function(event) {
+  postMessage(event.message);
+};
+
+// Pure JS recursion
+function recurse() {
+  recurse();
+}
+
+// JS -> C++ -> JS -> C++ recursion
+function recurse2() {
+  var xhr = new XMLHttpRequest();
+  xhr.onreadystatechange = function() {
+    xhr.open("GET", "nonexistent.file");
+  }
+  xhr.open("GET", "nonexistent.file");
+}
+
+var messageCount = 0;
+onmessage = function(event) {
+  switch (++messageCount) {
+    case 2:
+      recurse2();
+
+      // An exception thrown from an event handler like xhr.onreadystatechange
+      // should not leave an exception pending in the code that generated the
+      // event.
+      postMessage("Done");
+      return;
+
+    case 1:
+      recurse();
+      throw "Exception should have prevented us from getting here!";
+
+    default:
+      throw "Weird number of messages: " + messageCount;
+  }
+
+  throw "Impossible to get here!";
+}
-- 
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