--- /QCodec.java	2023-07-05 02:57:45.150055500 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/net/QCodec.java	2023-07-05 02:57:45.150055500 +0200
@@ -146,7 +146,7 @@
     }
 
     protected byte[] doDecoding(byte[] bytes) throws DecoderException {
-        if (bytes == null) {
+if  ( bytes != null )  {
             return null;
         }
         boolean hasUnderscores = false;
