Compression using JSMIN uses incorrect order

Using the JSMIN+ option works well but when I enable the JSMIN php extension then I get javascript errors. I have discovered that this is due to the scripts being compressed in a different order than with the JSMin+ option.

I believe that the call to jsmin() is happening too early. If I enable the JSMin+ option and then make the following code change, replacing the JSMinPlus call with a call to jsmin() then everything is fine. There is much logic that is happening before this which isn't happening before the real call to jsmin() so clearly the fault is not with the JSMIN php extension but with the advagg_js_compress module.

Index: advagg_js_compress/advagg_js_compress.module
===================================================================
--- advagg_js_compress/advagg_js_compress.module	(revision 1218)
+++ advagg_js_compress/advagg_js_compress.module	(working copy)
@@ -289,11 +289,12 @@
   try {
     $contents = str_replace(pack("CCC", 0xef, 0xbb, 0xbf), "", $contents);
     ob_start();
-    $contents = JSMinPlus::minify($contents);
-    $error = trim(ob_get_contents());
-    if (!empty($error)) {
-      throw new Exception($error);
-    }
+    $contents = jsmin($contents);
     $after = strlen($contents);
   }
   catch (Exception $e) {