Triggering an error in EndingWave() displays an unknown script

Testing confirms this does happen in v0.6.3 with this code:

function Update() end
function EndingWave()
    error("h")
end

Resulting in the output of:

error in script ???

chunk_2:(4,9-14): h

However, testing this in the current version of the feature branch yields this message:

error in script test

test:(4,9-14): h

(with test being the name of my wave script)

This was most likely fixed by these commits in order:

RhenaudTheLukark / CreateYourFrisk