From 5469df1d7b137d3fc73fc036cdb6d910ce3d7519 Mon Sep 17 00:00:00 2001
From: ben-toogood <bentoogood@gmail.com>
Date: Tue, 22 Sep 2020 10:00:14 +0100
Subject: [PATCH] store/file: fix segmentation violation bug (#2013)

---
 blob.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/blob.go b/blob.go
index eb5c34c..4c7a0e5 100644
--- a/blob.go
+++ b/blob.go
@@ -59,11 +59,16 @@ func (b *blobStore) Read(key string, opts ...store.BlobOption) (io.Reader, error
 		}
 
 		// look for the blob within the bucket
-		value = bucket.Get([]byte(key))
-		if value == nil {
+		res := bucket.Get([]byte(key))
+		if res == nil {
 			return store.ErrNotFound
 		}
 
+		// the res object is only valid for the duration of the blot transaction, see:
+		// https://github.com/golang/go/issues/33047
+		value = make([]byte, len(res))
+		copy(value, res)
+
 		return nil
 	}
 	if err := db.View(readValue); err != nil {