From 4b748447532173afb31b5293789f5b68025acb2e Mon Sep 17 00:00:00 2001
From: Mike Cohen <scudette@users.noreply.github.com>
Date: Sat, 11 Jan 2020 17:01:59 +1000
Subject: [PATCH] Check for empty buffer (#7)

Avoids panic on empty tags
---
 parser/pages.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/parser/pages.go b/parser/pages.go
index c999328..1eb86fb 100644
--- a/parser/pages.go
+++ b/parser/pages.go
@@ -22,7 +22,8 @@ func (self *Value) Reader() io.ReaderAt {
 
 func NewValue(ctx *ESEContext, tag *Tag, PageID int64, buffer []byte) *Value {
 	result := &Value{Tag: tag, PageID: PageID, Buffer: buffer}
-	if ctx.Version == 0x620 && ctx.Revision >= 17 && ctx.PageSize > 8192 {
+	if ctx.Version == 0x620 && ctx.Revision >= 17 &&
+		ctx.PageSize > 8192 && len(buffer) > 0 {
 		result.Flags = uint64(buffer[1] >> 5)
 		buffer[1] &= 0x1f
 	} else {