From d26a57fe93d8e4b2beddc2b314139445206a9439 Mon Sep 17 00:00:00 2001
From: Vindaar <basti90@gmail.com>
Date: Thu, 11 Oct 2018 14:21:38 +0200
Subject: [PATCH] append null terminator to source when creating `StringSource`

This makes editing the lexer unnecessary.
---
 yaml/private/lex.nim | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/yaml/private/lex.nim b/yaml/private/lex.nim
index 3da66c5..15fe989 100644
--- a/yaml/private/lex.nim
+++ b/yaml/private/lex.nim
@@ -1181,6 +1181,9 @@ proc newYamlLexer*(source: string, startAt: int = 0): YamlLexer
         GC_unref(cast[ref StringSource](x.source))
     )
     var sChar = '\0'
+    # append a `\0` at the very end to work around null terminator being
+    # inaccessible
+    sSource.src.add sChar
     if source.len > 0:
       sChar = sSource.src[startAt]
     result[] = YamlLexerObj(buf: "", source: cast[pointer](sSource),