Normalize and Trim not working (Renoise v3.5.2)

[aiobofh]

I get an error when the post-processing is about to start:

./process_slicer.lua:54: variable 'arg' not declared
stack traceback:
  [C]: in function 'error'
  [string "..."]:24 in function '__index'
  ./process_slicer.lua:54: in function <./process_slicer.lua:49>
  [C]: in function 'ProcessSlicer'
  ./crunch.lua:10 in function 'prep_processing'
  ./func.lua:316 in function 'normalize_and_trim'
  ./func.lua:299 in function 'TOCALL'
  ./util.lua:14 in function <./util.lua:11>

Could there be some difference in newer Renoise version that need to be considered?