From b939bc8d681d6e74a0b23f0a28edea25d012edf8 Mon Sep 17 00:00:00 2001
From: Yaz Saito <yasushi.saito@gmail.com>
Date: Tue, 21 Jul 2020 23:35:43 -0700
Subject: [PATCH] Fix encoding of a large composite data type

If encoding a field caused a buffer reallocation, the its length would be
written to a wrong place.
---
 composite_type.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/composite_type.go b/composite_type.go
index 49ce70fa..cbe0a245 100644
--- a/composite_type.go
+++ b/composite_type.go
@@ -576,7 +576,7 @@ func (b *CompositeBinaryBuilder) AppendEncoder(oid uint32, field BinaryEncoder)
 		return
 	}
 	if fieldBuf != nil {
-		binary.BigEndian.PutUint32(b.buf[lengthPos:], uint32(len(fieldBuf)-len(b.buf)))
+		binary.BigEndian.PutUint32(fieldBuf[lengthPos:], uint32(len(fieldBuf)-len(b.buf)))
 		b.buf = fieldBuf
 	}