src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotVMConfigStore.java

*** 191,200 ****
  
      @SuppressFBWarnings(value = "DM_DEFAULT_ENCODING", justification = "no localization here please!")
      private static void printConfigLine(CompilerToVM vm, String format, Object... args) {
          String line = String.format(format, args);
          byte[] lineBytes = line.getBytes();
!         vm.writeDebugOutput(lineBytes, 0, lineBytes.length);
!         vm.flushDebugOutput();
      }
  
  }
--- 191,199 ----
  
      @SuppressFBWarnings(value = "DM_DEFAULT_ENCODING", justification = "no localization here please!")
      private static void printConfigLine(CompilerToVM vm, String format, Object... args) {
          String line = String.format(format, args);
          byte[] lineBytes = line.getBytes();
!         vm.writeDebugOutput(lineBytes, 0, lineBytes.length, true, true);
      }
  
  }