VGUI Game crashing problem

[P4sca1]

I have a problem with my custom gamemode:
Sometimes when a menu gets opened, the game freezes and afterwards outputs this in server console (the player always differs of course):

[GermanCooky|85|STEAM_0:1:92547832] Lua Error:

[ERROR] 

I thought it is because I was using net.Receive() inside of a function and moved it outside.
It seemed to work at first, but the error still occurs.

The menu that gets opened is a custom PANEL, here is the code:

local SWRPFrame = {}

function SWRPFrame:Init()
	local frame = self

	self:SetPos(0, 0)
	self:SetSize(ScrW(), ScrH())
	self:SetDraggable(false)
	self:ShowCloseButton(false)
	self:SetTitle("")

	self.title = "Star Wars Roleplay"
	self.subTitle = "Untertitel"
	self.closeButton = true
	self.subTitleEnabled = true

	--background steht über SWRPFrame:Paint. CloseButton fixen!
	self.background = vgui.Create("DImage", self)
	self.background:SetPos(0, 0)
	self.background:SetSize(self:GetSize())
	local oldPaint = self.background.Paint
	function self.background:Paint(width, height)
		oldPaint(self, width, height)

		draw.RoundedBox(0, width * 0.2, 0, width * 0.6, height * 0.1, SWRP:GetColor("grey", 250))

		surface.SetDrawColor(SWRP:GetColor("grey", 250))
		draw.NoTexture()

		surface.DrawPoly({
			{x = width * 0.15, y = 0},
			{x = width * 0.2, y = 0},
			{x = width * 0.2, y = height * 0.1}
		})
		surface.DrawPoly({
			{x = width * 0.8, y = 0},
			{x = width * 0.85, y = 0},
			{x = width * 0.8, y = height * 0.1}
		})

		draw.DrawText(string.lower(frame.title), "SWRPTitle", width / 2, 0, SWRP:GetColor("yellow"), TEXT_ALIGN_CENTER)

		--subtitle
		if frame.subTitleEnabled then
			draw.RoundedBox(10, width * 0.25, height * 0.104, width * 0.5, height * 0.08, SWRP:GetColor("grey", 250))

			draw.SimpleText(string.lower(frame.subTitle), "SWRPSubTitle", width / 2, height * 0.125, SWRP:GetColor("blue"), TEXT_ALIGN_CENTER)
		end
	end

	self.close = vgui.Create("SWRPCloseButton", self)
	self.close:SetPos(self:GetWide() * 0.965, self:GetTall() * 0.01)
	self.close:SetSize(self:GetWide() * 0.03, self:GetTall() * 0.05)
	self.close:SetPanel(self)
	function self.close:Think()
		self:SetActivated(frame.closeButton)
	end
end

function SWRPFrame:Paint(width, height)
	--black background (if the background image is not available)
	draw.RoundedBox(0, 0, 0, width, height, SWRP:GetColor("black"))
end

function SWRPFrame:SetTitle(text)
	self.title = text
end

function SWRPFrame:SetSubTitle(text)
	self.subTitle = text
end

function SWRPFrame:CloseButton(bool)
	self.closeButton = bool
end

function SWRPFrame:SetBackground(image)
	if file.Exists(image, "GAME") then
		self.background:SetImage(image)
	end
end

function SWRPFrame:SubTitleEnabled(bool)
	self.subTitleEnabled = bool
end

vgui.Register("SWRPFrame", SWRPFrame, "DFrame")

and here is how I open the panel:

function SWRP:OpenPlayersMenu()
	if IsValid(SWRP.PlayersMenu.Frame) then
		SWRP.PlayersMenu.Frame:Close()
	end

	SWRP.PlayersMenu.Frame = vgui.Create("SWRPFrame")
	SWRP.PlayersMenu.Frame:SetBackground(SWRP.Config.PlayersMenuBackground)
	SWRP.PlayersMenu.Frame:SetSubTitle("Spieler Übersicht")

        --rest of the menu here
end

I hope somebody has a hint on what can cause this issue, because I want to release a server running this gamemode tomorrow.

[editline]10th July 2016[/editline]

Addons that are installed on the server currently:

- FProfiler ([url]https://facepunch.com/showthread.php?t=1517058[/url])
- GMaps ([url]https://scriptfodder.com/scripts/view/2375/gmaps[/url])
- ULX and ULib
- Advanced Duplicator
- some weapons, mostly scripted by myself, but I don't think that they can cause the issue, because it occurs only sometimes when you open a menu.

[P4sca1]

It seems like the error was fixed by removing FProfiler. I will leave this open until tomorrow, to see whether this issue really got solved.

[editline]10th July 2016[/editline]

Well it is not solved... This time the game not just froze, but instead gave me an engine error: Lua Panic! Something went horribly wrong! "not enough memory"

[editline]10th July 2016[/editline]

Is there anything in the code above that can freeze/crash the game?

[editline]10th July 2016[/editline]

Or at least a way to get a helpfull error / crash dump?

[Whiterabbit]

Shouldn't oldPaint(self, width, height) be oldPaint(self.background, width, height)?

[P4sca1]

self is equal to SWRPFrame.background in this context.

self.background would be equal to SWRPFrame.background.background which would be nil.

[Rubat]

If you are getting crashes, post crash logs.

Otherwise, dissect your code, remove parts until it stops crashing.

[P4sca1]

[QUOTE=Robotboy655;50687792]If you are getting crashes, post crash logs.

Otherwise, dissect your code, remove parts until it stops crashing.[/QUOTE]

That's the Problem: If the game crashes because of this, no Crash Log is generated and the console error just contains nothing.

[MysteryPancake]

local oldPaint = self.background.Paint -- This variable doesn't copy the original paint function, it IS the original
function self.background:Paint(width, height) -- This overrides self.background.Paint
oldPaint(self, width, height) -- Therefore, this is calling itself

I think this is creating an infinite loop. Try using [img]http://wiki.garrysmod.com/favicon.ico[/img] [url=http://wiki.garrysmod.com/page/PANEL/PaintOver]PANEL:PaintOver[/url] instead.

[P4sca1]

[QUOTE=MPan1;50689602]

local oldPaint = self.background.Paint -- This variable doesn't copy the original paint function, it IS the original
function self.background:Paint(width, height) -- This overrides self.background.Paint
oldPaint(self, width, height) -- Therefore, this is calling itself

I think this is creating an infinite loop. Try using [img]http://wiki.garrysmod.com/favicon.ico[/img] [url=http://wiki.garrysmod.com/page/PANEL/PaintOver]PANEL:PaintOver[/url] instead.[/QUOTE]

This does not fix the issue.

[editline]11th July 2016[/editline]

I noticed that afer the menu freezes, the ram usage is highering about 5mb per second until the game crashes.

Any idea what could cause this? An infinite loop?

[editline]11th July 2016[/editline]

if SERVER then
net.Start("uniquename")
net.WriteString("test")
net.Send(ply)
end)
end

if CLIENT then
net.Receive("uniquename", function()
--some code here
end)
end

I have a question to the example code above.

When I don't read something in the net receiver that got written in the net Message (like writing a string with net.Write() but not reading it with net.ReadString()), can it cause any issues?

Also when I do net.ReadInt(32) but no int has been written, can this cause any issues, like the int becoming -[hugenumberhere]?