fix build 2?

jps/model/src/org/jetbrains/jps/Library.groovy

@@ -23,6 +23,11 @@ class Library implements ClasspathItem {
     classpath << FileUtil.toCanonicalPath(arg)
   }
 
+  void addClasspath(GString arg) {
+    new Throwable().printStackTrace()
+    addClasspath(arg.toString())
+  }
+
   void src(Object[] arg) {
     arg.each { sourceRoots << FileUtil.toCanonicalPath(it.toString()) }
   }

jps/model/src/org/jetbrains/jps/idea/IdeaProjectLoader.groovy

@@ -394,7 +394,7 @@ public class IdeaProjectLoader {
           def paths = []
           collectChildJars(path, jarDirs[url], paths)
           paths.each {
-            library.addClasspath it
+            library.addClasspath it.toString()
           }
         }
         else {