src/java.base/share/native/launcher/main.c

*** 126,135 ****
--- 126,138 ----
              }
  
              // terminate the list
              JLI_List_add(list, NULL);
              jargv = list->elements;
+          } else if (extra_jargc > 0) { // should never happen
+             fprintf(stderr, "EXTRA_JAVA_ARGS defined without JAVA_ARGS");
+             abort();
           } else { // no extra args, business as usual
              jargc = main_jargc;
              jargv = (char **) const_jargs;
           }
      }