From daa48fdfb8e13c75b157a7b66cf9405bd6dea05f Mon Sep 17 00:00:00 2001
From: dmiller <dmiller@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Tue, 16 Oct 2018 05:18:29 +0000
Subject: [PATCH] Warn about a known bug in Lua 5.3.2 and earlier.

---
 nse_main.lua | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/nse_main.lua b/nse_main.lua
index a78beca74..656024ee6 100644
--- a/nse_main.lua
+++ b/nse_main.lua
@@ -239,6 +239,11 @@ local function log_error (fmt, ...)
   log_write("stderr", format(fmt, ...));
 end
 
+-- Check for and warn about some known bad behaviors
+if ("test"):gsub(".*$", "x") == "xx" then
+  log_error("Known bug in string.gsub in Lua 5.3 before 5.3.3 will cause bugs in NSE scripts.")
+end
+
 local function table_size (t)
   local n = 0; for _ in pairs(t) do n = n + 1; end return n;
 end