🐛 Avoid panic in liblzma::bufferd::XzEncoder::read

src/bufread.rs

@@ -130,7 +130,7 @@ impl<R: BufRead> Read for XzEncoder<R> {
             };
             self.obj.consume(consumed);
 
-            ret.unwrap();
+            ret?;
 
             // If we haven't ready any data and we haven't hit EOF yet, then we
             // need to keep asking for more data because if we return that 0