Index: trunk/src/org/openstreetmap/josm/io/Compression.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/Compression.java	(revision 19487)
+++ trunk/src/org/openstreetmap/josm/io/Compression.java	(revision 19500)
@@ -119,5 +119,5 @@
             return null;
         }
-        return new XZCompressorInputStream(in, true);
+        return XZCompressorInputStream.builder().setInputStream(in).setDecompressConcatenated(true).get();
     }