--- old/src/hotspot/share/interpreter/linkResolver.cpp	2018-06-22 19:20:55.489474996 -0400
+++ new/src/hotspot/share/interpreter/linkResolver.cpp	2018-06-22 19:20:53.925735313 -0400
@@ -588,14 +588,18 @@
                                        flags,
                                        true)) {
     ResourceMark rm(THREAD);
+    bool same_module = (sel_klass->module() == ref_klass->module());
     Exceptions::fthrow(
       THREAD_AND_LOCATION,
       vmSymbols::java_lang_IllegalAccessError(),
-      "tried to access method %s.%s%s from class %s",
+      "class %s tried to access method %s.%s%s (%s%s%s)",
+      ref_klass->external_name(),
       sel_klass->external_name(),
       sel_method->name()->as_C_string(),
       sel_method->signature()->as_C_string(),
-      ref_klass->external_name()
+      (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
+      (same_module) ? "" : "; ",
+      (same_module) ? "" : sel_klass->class_in_module_of_loader()
     );
     return;
   }