ChangeHistoryService crashes studio

Bug Reports Studio Bugs
#1

I am making a plugin that uses ChangeHistoryService and when I call :Undo() or :Redo() the service crashes the studio, is there a way around this crash?

#2

Maybe you’re calling it when there’s not history to revert back to?

#3

I used CanGetRedo() or CanGetUndo() to check, there were histories

#4

I used CanGetRedo() or CanGetUndo() to check, there were histories[/quote]

What is the code you’re using? Does it happen if you just call :Undo()/:Redo() without your other code?

#5

I will post again when I test this out

#6

I used CanGetRedo() or CanGetUndo() to check, there were histories[/quote]

What is the code you’re using? Does it happen if you just call :Undo()/:Redo() without your other code?[/quote]

It works without my other code but through all my efforts I cannot understand why, do I need to set a waypoint right after activating the service?

#7

Is there any reason it would crash?

#8

Post your code… Only then we can help you out… We won’t steal anything, we are help to help you…

#9

Okay so I have basically isolated the event between two pieces of code, one piece crashes the server, the next allows ChangeHistoryService to work, the problem is I do not understand what the difference between the two is, and I need to know the difference so I do not keep crashing my studio; These are both Plugin scripts.

Working code:

Button.Click:connect(function()
	print(123)
	count=count+1
	if ChangeHistoryService:GetCanUndo()then
		ChangeHistoryService:Undo();
		ChangeHistoryService:SetWaypoint('Hello')
	end	
--	Mouse=Plugin:GetMouse()
--	print(Mouse)
--	Mouse.KeyDown:connect(function(k)
--		print(k)
--		if k=="t"then
--			if ChangeHistoryService:GetCanUndo()then
--				ChangeHistoryService:Undo();
--				ChangeHistoryService:SetWaypoint('Hello')
--			end			
--		end
--	end)
end)

Crash Code:

Button.Click:connect(function()
	print(123)
	count=count+1
--	if ChangeHistoryService:GetCanUndo()then
--		ChangeHistoryService:Undo();
--		ChangeHistoryService:SetWaypoint('Hello')
--	end	
	Mouse=Plugin:GetMouse()
	print(Mouse)
	Mouse.KeyDown:connect(function(k)
		print(k)
		if k=="t"then
			if ChangeHistoryService:GetCanUndo()then
				ChangeHistoryService:Undo();
				ChangeHistoryService:SetWaypoint('Hello')
			end			
		end
	end)
end)

NOTE: (I Removed the Plugin:Activate(true) from both snippets because in neither case does it affect ChangeHistoryService)

So why is the first snipper working compared to the other snippet?

#10

posted before I saw this, I guess I can read minds now… huh.

#11

I have been doing more testing and it seems like the “Undo()” and “Redo()” only work when ran on the Click Event of the Button. I have tried RbxUtility signals, coroutines, Spawn, debounce calls, but as far As i could tell it only works in the Click event…

I have no other plugins installed or active that interact with ChangeHistoryService