--- old/src/hotspot/share/oops/klass.cpp	2018-06-20 11:50:34.572139176 +0200
+++ new/src/hotspot/share/oops/klass.cpp	2018-06-20 11:50:34.348139183 +0200
@@ -188,9 +188,10 @@
 // which doesn't zero out the memory before calling the constructor.
 // Need to set the _java_mirror field explicitly to not hit an assert that the field
 // should be NULL before setting it.
-Klass::Klass() : _prototype_header(markOopDesc::prototype()),
-                 _shared_class_path_index(-1),
-                 _java_mirror(NULL) {
+Klass::Klass(int id) : _id(id),
+                       _prototype_header(markOopDesc::prototype()),
+                       _shared_class_path_index(-1),
+                       _java_mirror(NULL) {
   CDS_ONLY(_shared_class_flags = 0;)
   CDS_JAVA_HEAP_ONLY(_archived_mirror = 0;)
   _primary_supers[0] = this;