1 files changed, 48 insertions, 0 deletions
diff --git a/netwerk/test/mochitests/test_1396395.html b/netwerk/test/mochitests/test_1396395.html
new file mode 100644
index 0000000000..dcfb952b3a
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+++ b/netwerk/test/mochitests/test_1396395.html
@@ -0,0 +1,48 @@
+<!DOCTYPE HTML>
+<!-- vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: -->
+<html>
+  <!-- Any copyright is dedicated to the Public Domain.
+    - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<head>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+</head>
+<body>
+  <iframe id="f" src="about:blank"></iframe>
+  <script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+
+var script = SpecialPowers.loadChromeScript(() => {
+  /* eslint-env mozilla/chrome-script */
+  Services.obs.addObserver(function onExamResp(subject, topic, data) {
+    let channel = subject.QueryInterface(Ci.nsIHttpChannel);
+    if (!channel.URI.spec.startsWith("http://example.org")) {
+      return;
+    }
+    Services.obs.removeObserver(onExamResp, 'http-on-examine-response');
+    channel.suspend();
+    Promise.resolve().then(() => {
+      channel.resume();
+    });
+  }, 'http-on-examine-response');
+
+  sendAsyncMessage('start-test');
+});
+
+script.addMessageListener('start-test', () => {
+  const iframe = document.getElementById('f');
+
+  iframe.contentWindow.onunload = function () {
+    info('initiate sync XHR during the page loading');
+    let xhr = new XMLHttpRequest();
+    xhr.open('GET', window.location, false);
+    xhr.send(null);
+    ok(true, 'complete without crash');
+    script.destroy();
+    SimpleTest.finish();
+  }
+
+  iframe.src = 'http://example.org';
+});
+  </script>
+</body>
+</html>