src/hotspot/share/oops/instanceKlass.cpp

*** 2640,2652 ****
      // If the interface isn't implemented by the receiver class,
      // the VM should throw IncompatibleClassChangeError.
      if (cnt >= nof_interfaces) {
        ResourceMark rm(THREAD);
        stringStream ss;
        ss.print("Receiver class %s does not implement "
!                "the interface %s defining the method to be called",
!                class_loader_and_module_name(), holder->class_loader_and_module_name());
        THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
      }
  
      Klass* ik = ioe->interface_klass();
      if (ik == holder) break;
--- 2640,2657 ----
      // If the interface isn't implemented by the receiver class,
      // the VM should throw IncompatibleClassChangeError.
      if (cnt >= nof_interfaces) {
        ResourceMark rm(THREAD);
        stringStream ss;
+       bool same_module = (module() == holder->module());      
        ss.print("Receiver class %s does not implement "
!                "the interface %s defining the method to be called "
!                "(%s%s%s)",
!                external_name(), holder->external_name(),
!                (same_module) ? joint_in_module_of_loader(holder) : class_in_module_of_loader(),
!                (same_module) ? "" : "; ",
!                (same_module) ? "" : holder->class_in_module_of_loader());
        THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
      }
  
      Klass* ik = ioe->interface_klass();
      if (ik == holder) break;