Bugfixes: removed hard nil val checks from toolkit.lua fixed few mismatches causing crashes

!Compatibility/api/wowAPI.lua

@@ -114,9 +114,9 @@ function hooksecurefunc(a1, a2, a3)
 
 	local original_func = a1[a2]
 
-	a1[a2] = function(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t)
-		local r1, r2, r3, r4, r5, r6, r7, r8, r9, r10 = original_func(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t)
-		a3(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t)
+	a1[a2] = function(...)
+		local r1, r2, r3, r4, r5, r6, r7, r8, r9, r10 = original_func(unpack(arg))
+		a3(unpack(arg))
 
 		return r1, r2, r3, r4, r5, r6, r7, r8, r9, r10
 	end

ElvUI/Core/toolkit.lua

@@ -45,22 +45,26 @@ local function GetTemplate(t, isUnitFrameElement)
 end
 
 function E:Size(frame, width, height)
+	if not frame then return end
 	assert(width)
 	frame:SetWidth(E:Scale(width))
 	frame:SetHeight(E:Scale(height or width))
 end
 
 function E:Width(frame, width)
+	if not frame then return end
 	assert(width)
 	frame:SetWidth(E:Scale(width))
 end
 
 function E:Height(frame, height)
+	if not frame then return end
 	assert(height)
 	frame:SetHeight(E:Scale(height))
 end
 
 function E:Point(obj, arg1, arg2, arg3, arg4, arg5)
+	if not obj then return end
 	if arg2 == nil then arg2 = obj:GetParent() end
 
 	if type(arg2)=="number" then arg2 = E:Scale(arg2) end
@@ -77,7 +81,7 @@ function E:SetOutside(obj, anchor, xOffset, yOffset, anchor2)
 	yOffset = yOffset or E.Border
 	anchor = anchor or obj:GetParent()
 
-	assert(anchor)
+	if not anchor then return end
 	if obj:GetPoint() then
 		obj:ClearAllPoints()
 	end
@@ -92,7 +96,7 @@ function E:SetInside(obj, anchor, xOffset, yOffset, anchor2)
 	yOffset = yOffset or E.Border
 	anchor = anchor or obj:GetParent()
 
-	assert(anchor)
+	if not anchor then return end
 	if obj:GetPoint() then
 		obj:ClearAllPoints()
 	end
@@ -102,7 +106,7 @@ function E:SetInside(obj, anchor, xOffset, yOffset, anchor2)
 end
 
 function E:SetTemplate(f, t, glossTex, ignoreUpdates, forcePixelMode, isUnitFrameElement)
-	if not f then return end
+	if not f or type(f) ~= "table" then return end
 	GetTemplate(t, isUnitFrameElement)
 
 	if t then
@@ -187,6 +191,7 @@ function E:SetTemplate(f, t, glossTex, ignoreUpdates, forcePixelMode, isUnitFram
 end
 
 function E:CreateBackdrop(f, t, tex, ignoreUpdates, forcePixelMode, isUnitFrameElement)
+	if not f then return end
 	if not t then t = "Default" end
 
 	local parent = f
@@ -199,8 +204,16 @@ function E:CreateBackdrop(f, t, tex, ignoreUpdates, forcePixelMode, isUnitFrameE
 	if parent and parent.IsObjectType and not parent:IsObjectType("Frame") then
 		parent = UIParent
 	end
+	if not parent or type(parent) ~= "table" or not parent.GetObjectType then
+		parent = UIParent
+	end
+	
+	local b = (type(f.backdrop) == "table" and f.backdrop)
+	if not b then
+		b = CreateFrame("Frame", nil)
+		pcall(function() b:SetParent(parent) end)
+	end
 
-	local b = f.backdrop or CreateFrame("Frame", nil, parent)
 	if f.forcePixelMode or forcePixelMode then
 		E:SetOutside(b, nil, E.mult, E.mult)
 	else
@@ -247,7 +260,8 @@ function E:Kill(object)
 end
 
 function E:StripTextures(object, kill, alpha)
-	if object:IsObjectType("Texture") then
+	if not object or type(object) ~= "table" then return end
+	if object.IsObjectType and object:IsObjectType("Texture") then
 		if kill then
 			E:Kill(object)
 		elseif alpha then

ElvUI/Modules/Skins/Blizzard/Misc.lua

@@ -225,14 +225,22 @@ local function LoadSkin()
 	end
 
 	-- if a button position is not really where we want, we move it here
+	if OptionsFrameCancel then
 		OptionsFrameCancel:ClearAllPoints()
 		E:Point(OptionsFrameCancel, "BOTTOMLEFT",OptionsFrame,"BOTTOMRIGHT",-105,15)
+	end
+	if OptionsFrameOkay and OptionsFrameCancel then
 		OptionsFrameOkay:ClearAllPoints()
 		E:Point(OptionsFrameOkay, "RIGHT",OptionsFrameCancel,"LEFT",-4,0)
+	end
+	if SoundOptionsFrameOkay and SoundOptionsFrameCancel then
 		SoundOptionsFrameOkay:ClearAllPoints()
 		E:Point(SoundOptionsFrameOkay, "RIGHT",SoundOptionsFrameCancel,"LEFT",-4,0)
+	end
+	if UIOptionsFrameOkay and UIOptionsFrameCancel then
 		UIOptionsFrameOkay:ClearAllPoints()
 		E:Point(UIOptionsFrameOkay, "RIGHT",UIOptionsFrameCancel,"LEFT", -4,0)
+	end
 
 	-- others
 	ZoneTextFrame:ClearAllPoints()
@@ -261,12 +269,14 @@ local function LoadSkin()
 	S:HandleSliderFrame(OpacityFrameSlider)
 
 	-- Interface Options
+	if UIOptionsFrame then
 		UIOptionsFrame:SetParent(E.UIParent)
 		UIOptionsFrame:EnableMouse(false)
 
 		hooksecurefunc("UIOptionsFrame_Load", function()
 			E:StripTextures(UIOptionsFrame)
 		end)
+	end
 
 	local UIOptions = {
 		"BasicOptions",
@@ -286,18 +296,23 @@ local function LoadSkin()
 		E:SetTemplate(options, "Transparent")
 	end
 
+	if BasicOptions and BasicOptionsGeneral and BasicOptionsHelp then
 		BasicOptions.backdrop = CreateFrame("Frame", nil, BasicOptions)
 		E:Point(BasicOptions.backdrop, "TOPLEFT", BasicOptionsGeneral, -20, 35)
 		E:Point(BasicOptions.backdrop, "BOTTOMRIGHT", BasicOptionsHelp, 20, -130)
 		E:SetTemplate(BasicOptions.backdrop, "Transparent")
+	end
 
+	if AdvancedOptions and BasicOptionsGeneral and AdvancedOptionsCombatText then
 		AdvancedOptions.backdrop = CreateFrame("Frame", nil, AdvancedOptions)
 		E:Point(AdvancedOptions.backdrop, "TOPLEFT", BasicOptionsGeneral, -20, 35)
-	E:Point(AdvancedOptions.backdrop, "BOTTOMRIGHT", BasicOptionsHelp, 20, -130)
+		E:Point(AdvancedOptions.backdrop, "BOTTOMRIGHT", AdvancedOptionsCombatText, 20, -130)
 		E:SetTemplate(AdvancedOptions.backdrop, "Transparent")
+	end
 
 	for i = 1, 2 do
 		local tab = _G["UIOptionsFrameTab"..i]
+		if tab then
 			E:StripTextures(tab, true)
 			E:CreateBackdrop(tab, "Transparent")
 
@@ -322,16 +337,21 @@ local function LoadSkin()
 			HookScript(tab, "OnEnter", S.SetModifiedBackdrop)
 			HookScript(tab, "OnLeave", S.SetOriginalBackdrop)
 		end
+	end
 
+	if UIOptionsFrame then
 		for _, child in ipairs({UIOptionsFrame:GetChildren()}) do
 			if child.GetPushedTexture and child:GetPushedTexture() and not child:GetName() then
 				child:SetFrameLevel(UIOptionsFrame:GetFrameLevel() + 2)
 				S:HandleCloseButton(child, UIOptionsFrame.backdrop)
 			end
 		end
+	end
 
+	if OptionsFrameDefaults then
 		OptionsFrameDefaults:ClearAllPoints()
 		E:Point(OptionsFrameDefaults, "TOPLEFT", OptionsFrame, "BOTTOMLEFT", 15, 36)
+	end
 
 	S:HandleButton(UIOptionsFrameResetTutorials)
 
@@ -368,48 +388,69 @@ local function LoadSkin()
 	end
 
 	-- Interface Options Checkboxes
-	for _, value in UIOptionsFrameCheckButtons do
-		local UIOptionsFrameCheckBox = _G["UIOptionsFrameCheckButton"..value.index]
-		if value.index == 7 then
+	if type(UIOptionsFrameCheckButtons) == "table" then
+		for _, value in pairs(UIOptionsFrameCheckButtons) do
+			local index = type(value) == "table" and value.index or value
+			local UIOptionsFrameCheckBox = _G["UIOptionsFrameCheckButton"..index]
+			if index == 7 and UIOptionsFrameCheckBox then
 				E:Kill(UIOptionsFrameCheckBox)
 			end
-		if value.index == 8 then
+			if index == 8 and UIOptionsFrameCheckBox then
 				E:Point(UIOptionsFrameCheckBox, "TOPLEFT", 10, -8)
 			end
 			if UIOptionsFrameCheckBox then
 				S:HandleCheckBox(UIOptionsFrameCheckBox)
 			end
 		end
+	end
 
 	-- Video Options Checkboxes
-	for _, value in OptionsFrameCheckButtons do
-		local OptionsFrameCheckButton = _G["OptionsFrameCheckButton"..value.index]
+	if type(OptionsFrameCheckButtons) == "table" then
+		for _, value in pairs(OptionsFrameCheckButtons) do
+			local index = type(value) == "table" and value.index or value
+			local OptionsFrameCheckButton = _G["OptionsFrameCheckButton"..index]
 			if OptionsFrameCheckButton then
 				S:HandleCheckBox(OptionsFrameCheckButton)
 			end
 		end
+	end
 
 	-- Sound Options Checkboxes
-	for _, value in SoundOptionsFrameCheckButtons do
-		local SoundOptionsFrameCheckButton = _G["SoundOptionsFrameCheckButton"..value.index]
+	if type(SoundOptionsFrameCheckButtons) == "table" then
+		for _, value in pairs(SoundOptionsFrameCheckButtons) do
+			local index = type(value) == "table" and value.index or value
+			local SoundOptionsFrameCheckButton = _G["SoundOptionsFrameCheckButton"..index]
 			if SoundOptionsFrameCheckButton then
 				S:HandleCheckBox(SoundOptionsFrameCheckButton)
 			end
 		end
+	end
 
 	-- Interface Options Sliders
-	for i in UIOptionsFrameSliders do
-		S:HandleSliderFrame(_G["UIOptionsFrameSlider"..i])
+	if type(UIOptionsFrameSliders) == "table" then
+		for _, value in pairs(UIOptionsFrameSliders) do
+			local index = type(value) == "table" and value.index or value
+			local slider = _G["UIOptionsFrameSlider"..index]
+			if slider then S:HandleSliderFrame(slider) end
+		end
 	end
 
 	-- Video Options Sliders
-	for i in OptionsFrameSliders do
-		S:HandleSliderFrame(_G["OptionsFrameSlider"..i])
+	if type(OptionsFrameSliders) == "table" then
+		for _, value in pairs(OptionsFrameSliders) do
+			local index = type(value) == "table" and value.index or value
+			local slider = _G["OptionsFrameSlider"..index]
+			if slider then S:HandleSliderFrame(slider) end
+		end
 	end
 
 	-- Sound Options Sliders
-	for i in SoundOptionsFrameSliders do
-		S:HandleSliderFrame(_G["SoundOptionsFrameSlider"..i])
+	if type(SoundOptionsFrameSliders) == "table" then
+		for _, value in pairs(SoundOptionsFrameSliders) do
+			local index = type(value) == "table" and value.index or value
+			local slider = _G["SoundOptionsFrameSlider"..index]
+			if slider then S:HandleSliderFrame(slider) end
+		end
 	end
 end
 

ElvUI/Modules/Skins/Skins.lua

@@ -47,6 +47,7 @@ function S:SetOriginalBackdrop()
 end
 
 function S:HandleButton(f, strip, isDeclineButton)
+	if not f then return end
 	local name = f:GetName()
 	if name then
 		local left = _G[name.."Left"]

README.md

@@ -12,6 +12,10 @@
 - **Fix:** Made ElvUI's backported `table.wipe` resilient to `nil` values, fixing crashes with native Turtle WoW UI scripts (like `Turtle_ShopUI.lua`) and lazy addons.
 - **Fix:** Added type safety checks to `SetOutside` and `SetInside` to prevent crashes when other addons overwrite frame globals with dummy functions.
 - **Fix:** Added type safety check before calling `SetTexture("")` on Blizzard header frames, preventing crashes when headers are modified by other addons or the custom client.
+- **Fix:** Wrapped `SetParent` in `pcall` within `CreateBackdrop` to prevent crashes on non-UI object dummy tables.
+- **Fix:** Added graceful `nil` fallbacks to `E:Point`, `E:Size`, `E:Width`, and `E:Height` layout anchors, immunizing the UI against crashes when Turtle WoW or other addons delete elements.
+- **Fix:** Rewrote `Misc.lua` options skinning loops using `pairs()` to resolve Lua 5.0 `attempt to call a nil value` crashes caused by missing options tabs/sliders/checkboxes.
+- **Fix:** Added element existence checks in `Skins.lua` `HandleButton` to skip skinning gracefully instead of crashing on `nil`.
 
 This is the backported version of ElvUI for World of Warcraft - Vanilla (1.12.1) 
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