Capturing Traceback With Pcall and Yielding

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#1 
local function A()
	wait(0.1)
	error("Some error")
end

local function B()
	A()
end


--Right error, no traceback.
local Worked,Error = pcall(B)
if not Worked then
	warn(Error)
	print(debug.traceback())
end

--Wrong error (xpcall can't yield).
xpcall(B,function(Error)
	warn(Error)
	print(debug.traceback())
end)

I am trying to create a new plugin that properly captures the traceback of an error, however I can’t assume there will be no yielding with the functions I need to pcall. Using pcall hides the traceback and xpcall can’t yield. Is there any alternatives that would work for this?

#2

Is this event something that could work for you?

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#3

Unfortunately, it doesn’t look like it. The project this is for is a unit testing plugin, which will run these in parallel. I don’t see a good way to use the event to map the error to the correct test running, since there may be no script context or multiple per script.

Edit: Maybe it can work if I either use Error:Wait() or connect it and “grab” the latest output and hope that I don’t run into any concurrency problems. I will update or post when I test that.

Edit 2: I am not sure why I didn’t try to search “yxpcall”. I found a thread by Corecii that has a workable solution. I should be able to modify it for my use case.

1 Like