[BUG] Strange error on Medium, but not on Strong preset

[brandonsturgeon]

Describe the bug
I was getting an error when using the Medium preset, but not the Strong preset.

The error:

Tried to Add Child that is referencing a Higher non global variable!

Expected behavior
Given the same input, all presets should display the same behavior (all succeeding, or all failing).

To Reproduce
I simplified the code down to the simplest form that still displayed this bug:

do end
function a() end
math.min(0, 1)

If I remove any one of these lines, the Medium preset works fine.

Screenshots

I'll try to investigate later, but wanted to put up an issue in case you already knew the root cause.

Additional context
I'm using the master branch with the fix from this issue applied: #26

[levno-710]

I haven't had this exact issue, but i will try to find out where it originates from.
For your investigation: The error is thrown in line 204 of root/src/prometheus/scope.lua

[levno-710]

This issue had two causes:
The first one was a bug in visitast.lua, that i fixed with 949b4ea.
The second one was a bug in scope.lua that i fixed with 06e4f74
For me this script does work on medium after applying these changes.

However it could be that this doesn't work for you, because i applied these fixes to my development version so maybe the overall fix also relies on some other changes that aren't in the current release.