From 4ac515fde468f8d0845ae68fa4416ed4525bce90 Mon Sep 17 00:00:00 2001
From: Richard <richard.scothern@gmail.com>
Date: Fri, 10 Apr 2015 15:56:29 -0700
Subject: [PATCH] Prevent Close() from being called after Finish()

---
 docs/storage/layerwriter.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/storage/layerwriter.go b/docs/storage/layerwriter.go
index ccd8679b..58078459 100644
--- a/docs/storage/layerwriter.go
+++ b/docs/storage/layerwriter.go
@@ -109,6 +109,10 @@ func (lw *layerWriter) ReadFrom(r io.Reader) (n int64, err error) {
 }
 
 func (lw *layerWriter) Close() error {
+	if lw.err != nil {
+		return lw.err
+	}
+
 	if err := lw.storeHashState(); err != nil {
 		return err
 	}