--- old/src/hotspot/share/gc/shenandoah/heuristics/shenandoahCompactHeuristics.cpp	2020-04-04 02:23:15.271362920 +0200
+++ new/src/hotspot/share/gc/shenandoah/heuristics/shenandoahCompactHeuristics.cpp	2020-04-04 02:23:15.164363909 +0200
@@ -41,6 +41,12 @@
   SHENANDOAH_ERGO_OVERRIDE_DEFAULT(ShenandoahUncommitDelay,        1000);
   SHENANDOAH_ERGO_OVERRIDE_DEFAULT(ShenandoahGuaranteedGCInterval, 30000);
   SHENANDOAH_ERGO_OVERRIDE_DEFAULT(ShenandoahGarbageThreshold,     10);
+
+  // Final configuration checks
+  SHENANDOAH_CHECK_FLAG_SET(ShenandoahLoadRefBarrier);
+  SHENANDOAH_CHECK_FLAG_SET(ShenandoahSATBBarrier || ShenandoahStoreValEnqueueBarrier);
+  SHENANDOAH_CHECK_FLAG_SET(ShenandoahCASBarrier);
+  SHENANDOAH_CHECK_FLAG_SET(ShenandoahCloneBarrier);
 }
 
 bool ShenandoahCompactHeuristics::should_start_gc() const {