src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.word/src/org/graalvm/compiler/word/WordOperationPlugin.java

*** 266,275 ****
--- 266,278 ----
                      return;
              }
          }
  
          Word.Operation operation = BridgeMethodUtils.getAnnotation(Word.Operation.class, wordMethod);
+         if (operation == null) {
+             throw bailout(b, "Cannot call method on a word value: " + wordMethod.format("%H.%n(%p)"));
+         }
          switch (operation.opcode()) {
              case NODE_CLASS:
                  assert args.length == 2;
                  ValueNode left = args[0];
                  ValueNode right = operation.rightOperandIsInt() ? toUnsigned(b, args[1], JavaKind.Int) : fromSigned(b, args[1]);