diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug799185-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug799185-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,51 @@
+function test(aLauncher) {
+    var result = null;
+
+    let prefs = 0;
+    let bundle = 1;
+
+    if (!bundle) {
+      // Check to see if the user wishes to auto save to the default download
+      // folder without prompting. Note that preference might not be set.
+      let autodownload = false;
+      try {
+        autodownload = !!autodownload;
+      } catch (e) { }
+
+      if (autodownload) {
+        // Retrieve the user's default download directory
+        let dnldMgr = 2;
+        let defaultFolder = 3;
+
+        try {
+          result = 42;
+        }
+        catch (ex) {
+          if (result == 12) {
+            let prompter = 4;
+            return;
+          }
+        }
+
+        // Check to make sure we have a valid directory, otherwise, prompt
+        if (result)
+          return result;
+      }
+    }
+
+    // Use file picker to show dialog.
+    var picker = 0;
+    if (picker) {
+      // aSuggestedFileExtension includes the period, so strip it
+      picker = 1;
+    }
+    else {
+      try {
+        picker = aLauncher.MIMEInfo.primaryExtension;
+      }
+      catch (ex) { }
+    }
+    return result;
+  }
+
+test({});