Ensure error in file walking is correctly returned

1 files changed, 3 insertions, 0 deletions

diff --git a/cmd/pdfbook/main.go b/cmd/pdfbook/main.go
index 3fdcc67..56f981d 100644
--- a/cmd/pdfbook/main.go
+++ b/cmd/pdfbook/main.go
@@ -82,6 +82,9 @@ func addBest(dir string, pdf Pdfer, colour, smaller bool) error {
 // the pdf for each one.
 func walker(pdf Pdfer, colour, smaller bool) filepath.WalkFunc {
 	return func(fpath string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
 		if info.IsDir() {
 			return nil
 		}