src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java

8211283: Miscellaneous changes imported from jsr166 CVS 2018-11
Reviewed-by: martin, chegar

@@ -2540,10 +2540,12 @@
                             setTabAt(nextTab, i, ln);
                             setTabAt(nextTab, i + n, hn);
                             setTabAt(tab, i, fwd);
                             advance = true;
                         }
+                        else if (f instanceof ReservationNode)
+                            throw new IllegalStateException("Recursive update");
                     }
                 }
             }
         }
     }