src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/IncludeLocalesPlugin.java

@@ -160,11 +160,11 @@
         priorityList = Arrays.stream(userParam.split(","))
             .map(s -> {
                 try {
                     return new Locale.LanguageRange(s);
                 } catch (IllegalArgumentException iae) {
-                    throw new PluginException(String.format(
+                    throw new IllegalArgumentException(String.format(
                         PluginsResourceBundle.getMessage(NAME + ".invalidtag"), s));
                 }
             })
             .collect(Collectors.toList());
     }