Consider module-info.class as a resource and do not try backporting it

Fixes #122

Author: luontola

README.md

@@ -236,6 +236,8 @@ Version History
 
 - Fixed running Retrolambda under Java 9 
   ([Issue #137](https://github.com/orfjackal/retrolambda/issues/137))
+- Consider `module-info.class` as a resource and do not try backporting it
+  ([Issue #122](https://github.com/orfjackal/retrolambda/issues/122))
 
 ### Retrolambda 2.5.1 (2017-02-23)
 

retrolambda/src/main/java/net/orfjackal/retrolambda/files/ClasspathVisitor.java

@@ -38,6 +38,7 @@ public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IO
     protected abstract void visitResource(Path relativePath, byte[] content) throws IOException;
 
     private static boolean isJavaClass(Path file) {
-        return file.getFileName().toString().endsWith(".class");
+        String fileName = file.getFileName().toString();
+        return fileName.endsWith(".class") && !fileName.equals("module-info.class");
     }
 }