ghci -fexternal-interpreter -profGHCi, version 8.2.1: http://www.haskell.org/ghc/ :? for helpAccess violation in generated code when reading 00000001001e0418
The address remains the same between reruns (and reinstalls) of ghc.
Closing the hanging process leaves the launched ghc active in the background.
The directory I launch ghci from doesn't seem to matter.
I have only tried it on my desktop so far (Win10/Skylake)