Merge pull request #20458 from aaronlehmann/migration-close-gzip-writer

Close tarsplit gzip writer when creating tar-split.json.gz files during layer migration
Upstream-commit: 70687226781545499c45414286a5b864bfc4eecd
Component: engine

components/engine/layer/migration.go

@@ -127,6 +127,7 @@ func (ls *layerStore) checksumForGraphIDNoTarsplit(id, parent, newTarDataPath st
 	}
 	defer f.Close()
 	mfz := gzip.NewWriter(f)
+	defer mfz.Close()
 	metaPacker := storage.NewJSONPacker(mfz)
 
 	packerCounter := &packSizeCounter{metaPacker, &size}