From a8202352a89d650bdabb87e4f81ffc4b87cadeb0 Mon Sep 17 00:00:00 2001
From: Yuriy Glukhov <yglukhov@users.noreply.github.com>
Date: Thu, 13 Jul 2017 00:48:10 +0300
Subject: [PATCH] writeChunk -> gcsafe

---
 nimPNG.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nimPNG.nim b/nimPNG.nim
index 2cdc442..996c858 100644
--- a/nimPNG.nim
+++ b/nimPNG.nim
@@ -2001,7 +2001,7 @@ proc writeInt32BE(s: Stream, value: int) =
   bigEndian32(addr(tmp), addr(val))
   s.write(tmp)
 
-method writeChunk(chunk: PNGChunk, png: PNG): bool {.base.} = true
+method writeChunk(chunk: PNGChunk, png: PNG): bool {.base, gcsafe.} = true
 
 method writeChunk(chunk: PNGHeader, png: PNG): bool =
   #estimate 13 bytes