src/share/vm/gc/shenandoah/shenandoahMarkCompact.cpp

*** 315,327 ****
    if (UseShenandoahMatrix) {
      if (PrintShenandoahMatrix) {
        outputStream* log = Log(gc)::info_stream();
        _heap->connection_matrix()->print_on(log);
      }
-     if (VerifyShenandoahMatrix) {
-       _heap->verify_matrix();
      }
    }
  
    if (VerifyDuringGC) {
      HandleMark hm;  // handle scope
      //    Universe::heap()->prepare_for_verify();
--- 315,328 ----
    if (UseShenandoahMatrix) {
      if (PrintShenandoahMatrix) {
        outputStream* log = Log(gc)::info_stream();
        _heap->connection_matrix()->print_on(log);
      }
    }
+ 
+   if (ShenandoahVerify || (UseShenandoahMatrix && VerifyShenandoahMatrix)) {
+     _heap->verify_heap_reachable_at_safepoint();
    }
  
    if (VerifyDuringGC) {
      HandleMark hm;  // handle scope
      //    Universe::heap()->prepare_for_verify();