diff -r 4698900b8221 -r 6c179587bf5b src/share/vm/memory/metaspace.cpp
--- a/src/share/vm/memory/metaspace.cpp	Thu Apr 09 13:07:11 2020 +0000
+++ b/src/share/vm/memory/metaspace.cpp	Thu Apr 09 20:58:56 2020 +0000
@@ -3390,6 +3390,8 @@
   if (using_class_space()) {
     // Allocate SpaceManager for classes.
     _class_vsm = new SpaceManager(ClassType, lock);
+  } else {
+    _class_vsm = NULL;
   }
 
   MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag);