--- old/src/hotspot/share/runtime/basicLock.cpp	2018-07-04 16:48:47.913121587 +0200
+++ new/src/hotspot/share/runtime/basicLock.cpp	2018-07-04 16:48:47.185121597 +0200
@@ -61,6 +61,10 @@
   // There are some subtle concurrency issues, however, and since the benefit is
   // is small (given the support for inflated fast-path locking in the fast_lock, etc)
   // we'll leave that optimization for another time.
+  if (obj->is_value()) {
+    // Ignore value types
+    return;
+  }
 
   if (displaced_header()->is_neutral()) {
     ObjectSynchronizer::inflate_helper(obj);