linter: enable nilerr

A number of cases looked suspicious, so I marked them with `FIXME`s to
leave some breadcrumbs.

Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

1 files changed, 4 insertions, 5 deletions

diff --git a/pkg/checkpoint/crutils/checkpoint_restore_utils.go b/pkg/checkpoint/crutils/checkpoint_restore_utils.go
index 2765d18e8..5b2097a71 100644
--- a/pkg/checkpoint/crutils/checkpoint_restore_utils.go
+++ b/pkg/checkpoint/crutils/checkpoint_restore_utils.go
@@ -99,13 +99,12 @@ func CRRemoveDeletedFiles(id, baseDirectory, containerRootDirectory string) erro
 // root file system changes on top of containerRootDirectory
 func CRApplyRootFsDiffTar(baseDirectory, containerRootDirectory string) error {
 	rootfsDiffPath := filepath.Join(baseDirectory, metadata.RootFsDiffTar)
-	if _, err := os.Stat(rootfsDiffPath); err != nil {
-		// Only do this if a rootfs-diff.tar actually exists
-		return nil
-	}
-
+	// Only do this if a rootfs-diff.tar actually exists
 	rootfsDiffFile, err := os.Open(rootfsDiffPath)
 	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
 		return errors.Wrap(err, "failed to open root file-system diff file")
 	}
 	defer rootfsDiffFile.Close()