Fail more gracefully when duplicate classes are detected.
Fail more gracefully when duplicate classes are detected.

blue-systems-group/project.maybe.polyglot,xcv58/polyglot,liujed/polyglot-eclipse,xcv58/polyglot,liujed/polyglot-eclipse,liujed/polyglot-eclipse,xcv58/polyglot,liujed/polyglot-eclipse,xcv58/polyglot,blue-systems-group/project.maybe.polyglot,blue-systems-group/project.maybe.polyglot,blue-systems-group/project.maybe.polyglot