src/java.base/share/classes/com/sun/java/util/jar/pack/PackerImpl.java

@@ -315,11 +315,11 @@
             }
             InFile(JarEntry je) {
                 this(null, je);
             }
             boolean isClassFile() {
-                if (!name.endsWith(".class")) {
+                if (!name.endsWith(".class") || name.endsWith("module-info.class")) {
                     return false;
                 }
                 for (String prefix = name;;) {
                     if (passFiles.contains(prefix)) {
                         return false;