Looks like it's line 440 of scanner.js
- myEval.call(out, 'this.fn = (function(_CONTEXT,_VIEW){' + out.out + '});\r\n//@ sourceURL=' + name + ".js");
Changing it to the following fixes my problem.
- myEval.call(out, 'this.fn = (function(_CONTEXT,_VIEW){' + out.out + '});\r\n');
I haven't done exhaustive testing, but I wanted to report back. App is now loading in IE9