src/java.base/share/classes/jdk/internal/foreign/abi/UpcallStubs.java

@@ -26,19 +26,20 @@
  
  import java.lang.foreign.MemorySegment;
  import java.lang.foreign.Arena;
  
  import jdk.internal.foreign.MemorySessionImpl;
+ import jdk.internal.foreign.Utils;
  
  public final class UpcallStubs {
  
      private UpcallStubs() {
      }
  
      private static void freeUpcallStub(long stubAddress) {
          if (!freeUpcallStub0(stubAddress)) {
-             throw new IllegalStateException("Not a stub address: " + stubAddress);
+             throw new IllegalStateException("Not a stub address: " + Utils.toHexString(stubAddress));
          }
      }
  
      // natives