From 72948978fa5d9041053fd77731d10e2522223c26 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tam=C3=A1s=20B=C3=A1lint=20Misius?= <lbphacker@gmail.com>
Date: Thu, 24 Jun 2021 07:09:58 +0200
Subject: [PATCH] Fix over-eager MSVCRT bounds checking crash in LuaTCPSocket

MSVCRT doesn't like .operator[](.size()), it's safer to just replace all &.operator[x] with &.operator[0]+x.
---
 src/lua/LuaTCPSocket.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/lua/LuaTCPSocket.cpp b/src/lua/LuaTCPSocket.cpp
index dbfe4c358..a42339de1 100644
--- a/src/lua/LuaTCPSocket.cpp
+++ b/src/lua/LuaTCPSocket.cpp
@@ -205,7 +205,7 @@ namespace LuaTCPSocket
 			CURLcode res = CURLE_OK;
 			if (!tcps->writeClosed)
 			{
-				res = curl_easy_send(tcps->easy, &data[writtenTotal], len - writtenTotal, &writtenNow);
+				res = curl_easy_send(tcps->easy, &data[0] + writtenTotal, len - writtenTotal, &writtenNow);
 			}
 			writtenTotal += writtenNow;
 			if (writtenTotal >= len)
@@ -299,7 +299,7 @@ namespace LuaTCPSocket
 			}
 			else
 			{
-				res = curl_easy_recv(tcps->easy, &tcps->recvBuf[readTotal], len - readTotal, &readNow);
+				res = curl_easy_recv(tcps->easy, &tcps->recvBuf[0] + readTotal, len - readTotal, &readNow);
 			}
 			readTotal += readNow;
 			returning = readTotal;
@@ -410,8 +410,8 @@ namespace LuaTCPSocket
 		//   of view of an "*l" pattern). Handling this edge case in a special,
 		//   sub-quadratic way isn't worth the effort.
 		std::copy(
-			&tcps->recvBuf[readTotal - tcps->stashedLen],
-			&tcps->recvBuf[readTotal],
+			&tcps->recvBuf[0] + readTotal - tcps->stashedLen,
+			&tcps->recvBuf[0] + readTotal,
 			&tcps->recvBuf[0]
 		);
 		return retn;