From 381c6bef687f3e2ce9120b68d708a1881e96d1bc Mon Sep 17 00:00:00 2001
From: Matt Joiner <anacrolix@gmail.com>
Date: Wed, 2 Oct 2013 19:54:23 +1000
Subject: [PATCH] Failing WriteAt should return ErrShortWrite

See the implementation of io.Copy.
---
 mmap_span.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mmap_span.go b/mmap_span.go
index f7d91059..9d2f39bb 100644
--- a/mmap_span.go
+++ b/mmap_span.go
@@ -56,7 +56,7 @@ func (me MMapSpan) WriteAt(p []byte, off int64) (n int, err error) {
 		return len(p) == 0
 	})
 	if len(p) != 0 {
-		err = io.EOF
+		err = io.ErrShortWrite
 	}
 	return
 }
-- 
2.48.1