chunked: close reader pipe before waiting for errors

close the pipe immediately when the file is closed to avoid a possible
deadlock if the other end is waiting for EOF on the writer side.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

pkg/chunked/compressor/compressor.go

@@ -452,12 +452,12 @@ type zstdChunkedWriter struct {
 }
 
 func (w zstdChunkedWriter) Close() error {
-	err := <-w.tarSplitErr
-	if err != nil {
-		w.tarSplitOut.Close()
+	errClose := w.tarSplitOut.Close()
+
+	if err := <-w.tarSplitErr; err != nil && err != io.EOF {
 		return err
 	}
-	return w.tarSplitOut.Close()
+	return errClose
 }
 
 func (w zstdChunkedWriter) Write(p []byte) (int, error) {