From 2538708dfb6c4b3e02bac958b2dc2854f30680c0 Mon Sep 17 00:00:00 2001
From: keks <keks@cryptoscope.co>
Date: Sun, 15 Oct 2017 14:07:03 +0200
Subject: [PATCH] fix 'file already closed' in Go 1.9

---
 serialfile.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/serialfile.go b/serialfile.go
index 2fe35be..611d3f1 100644
--- a/serialfile.go
+++ b/serialfile.go
@@ -59,7 +59,14 @@ func (f *serialFile) NextFile() (File, error) {
 	// if a file was opened previously, close it
 	err := f.Close()
 	if err != nil {
-		return nil, err
+		switch err2 := err.(type) {
+		case *os.PathError:
+			if err2.Err != os.ErrClosed {
+				return nil, err
+			}
+		default:
+			return nil, err
+		}
 	}
 
 	// if there aren't any files left in the root directory, we're done