--- old/src/java.base/share/classes/jdk/internal/module/ModuleReferenceImpl.java	2017-02-07 13:13:47.217191302 +0000
+++ new/src/java.base/share/classes/jdk/internal/module/ModuleReferenceImpl.java	2017-02-07 13:13:47.053180039 +0000
@@ -163,7 +163,14 @@
 
     @Override
     public String toString() {
-        return super.toString();
+        StringBuilder sb = new StringBuilder();
+        sb.append("[module ");
+        sb.append(descriptor().name());
+        sb.append(", location=");
+        sb.append(location().orElseThrow(() -> new InternalError()));
+        if (isPatched()) sb.append(" (patched)");
+        sb.append("]");
+        return sb.toString();
     }
 
 }