From c78e7eb5dd76e1b9e6993df364e21b9e3eef0e0b Mon Sep 17 00:00:00 2001
From: QuickStick <31533893+QuickStick123@users.noreply.github.com>
Date: Sat, 17 Dec 2022 17:04:05 +1100
Subject: [PATCH] Check nil on fileText

---
 src/Modules/Build.lua     |  4 ++++
 src/Modules/BuildList.lua | 14 ++++++++------
 src/Modules/Common.lua    |  6 +++++-
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/src/Modules/Build.lua b/src/Modules/Build.lua
index 02bbf8d459..5359598d3f 100644
--- a/src/Modules/Build.lua
+++ b/src/Modules/Build.lua
@@ -1547,6 +1547,10 @@ function buildMode:LoadDBFile()
 		return true
 	end
 	local xmlText = file:read("*a")
+	if not xmlText then
+		self.dbFileName = nil
+		return true
+	end
 	file:close()
 	return self:LoadDB(xmlText, self.dbFileName)
 end
diff --git a/src/Modules/BuildList.lua b/src/Modules/BuildList.lua
index 8988e9f0f1..03f638266d 100644
--- a/src/Modules/BuildList.lua
+++ b/src/Modules/BuildList.lua
@@ -165,13 +165,15 @@ function listMode:BuildList()
 		if fileHnd then
 			local fileText = fileHnd:read("*a")
 			fileHnd:close()
-			fileText = fileText:match("(<Build.->)")
 			if fileText then
-				local xml = common.xml.ParseXML(fileText.."</Build>")
-				if xml and xml[1] then
-					build.level = tonumber(xml[1].attrib.level)
-					build.className = xml[1].attrib.className
-					build.ascendClassName = xml[1].attrib.ascendClassName
+				fileText = fileText:match("(<Build.->)")
+				if fileText then
+					local xml = common.xml.ParseXML(fileText.."</Build>")
+					if xml and xml[1] then
+						build.level = tonumber(xml[1].attrib.level)
+						build.className = xml[1].attrib.className
+						build.ascendClassName = xml[1].attrib.ascendClassName
+					end
 				end
 			end
 		end
diff --git a/src/Modules/Common.lua b/src/Modules/Common.lua
index 119a087656..8bae058881 100644
--- a/src/Modules/Common.lua
+++ b/src/Modules/Common.lua
@@ -626,7 +626,11 @@ function copyFile(srcName, dstName)
 	if not outFile then
 		return nil, "Couldn't create '"..dstName.."': "..msg
 	end
-	outFile:write(inFile:read("*a"))
+	local fileText = inFile:read("*a")
+	if not fileText then
+		return nil, "Couldn't read '"..srcName.."': "..msg
+	end	
+	outFile:write(fileText)
 	inFile:close()
 	outFile:close()
 	return true