From d24a188d4c6862fdbe8429df91e67f6dc8a40db8 Mon Sep 17 00:00:00 2001
From: ToruNiina <niina.toru.68u@gmail.com>
Date: Mon, 24 Dec 2018 15:06:26 +0900
Subject: [PATCH] fix the error while reading BOM.

remove possible UB because of the use-after-move.
---
 toml/parser.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/toml/parser.hpp b/toml/parser.hpp
index 882a49c..ab309fb 100644
--- a/toml/parser.hpp
+++ b/toml/parser.hpp
@@ -1472,10 +1472,10 @@ inline table parse(std::istream& is, std::string fname = "unknown file")
     // be compared to char. However, since we are always out of luck, we need to
     // check our chars are equivalent to BOM. To do this, first we need to
     // convert char to unsigned char to guarantee the comparability.
-    if(letters.size() >= 3)
+    if(loc.source()->size() >= 3)
     {
         std::array<unsigned char, 3> BOM;
-        std::memcpy(BOM.data(), letters.data(), 3);
+        std::memcpy(BOM.data(), loc.source()->data(), 3);
         if(BOM[0] == 0xEF && BOM[1] == 0xBB && BOM[2] == 0xBF)
         {
             loc.iter() += 3; // BOM found. skip.