Stacking profiler labels too deeply can cause client crashes on the Detailed view

Bug Reports Engine Bugs
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1

If you stack too many profiler labels (e.g. I tried profiling something that was more recursive than expected), the client can crash upon viewing the Detailed mode of the Ctrl + F6 microprofiler

Test game: microprofiler - Roblox
Simple reproduction (put this in a LocalScript):

local function test(n)
	debug.profilebegin("test")
	if n < 200 then
		test(n + 1)
	end
	debug.profileend()
end

game:GetService("RunService").RenderStepped:Connect(function()
	test(1)
end)

200 should be enough such that you don’t immediately crash upon opening the detailed view, but do crash upon zooming out further

Interestingly, unlike a different similar crash I’ve encountered elsewhere, this crash seems to not create a crash dump file under logs/crashes, so I have no crash info to attach, but the crash should be more than reliable enough that it isn’t required

2

Hi, thanks for reporting this. We definitely should limit the depth when storing this in internal buffers (as well as fix the on-screen UI crash caused by overflow). Currently, we only limit the stack depth when displaying it in the HTML dump viewer.

3

Was this knowingly fixed? The render still freaks out a bit when there’s so many labels, BUT it’s no longer hard crashing or vanishing weirdly when I open the menu