I am trying to see callstacks as explained here, https://simonmar.github.io/posts/2016-02-12-Stack-traces-in-GHCi.html
Unfortunately I am getting an error right after ghci starts :
C:\Users\sandwood>ghci -fexternal-interpreter -prof
GHCi, version 8.2.1: http://www.haskell.org/ghc/ :? for help
Access violation in generated code when reading 00000001001a0418
Any clue of what to do ?