GHCi, version 8.2.1: http://www.haskell.org/ghc/ :? for help Glasgow Haskell Compiler, Version 8.2.1, stage 2 booted by GHC version 8.0.2 Using binary package database: C:\Users\micha\Desktop\GHC\ghc-8.2.1\lib\package.conf.d\package.cache package flags [] loading package database C:\Users\micha\Desktop\GHC\ghc-8.2.1\lib\package.conf.d wired-in package ghc-prim mapped to ghc-prim-0.5.1.0 wired-in package integer-gmp mapped to integer-gmp-1.0.1.0 wired-in package base mapped to base-4.10.0.0 wired-in package rts mapped to rts wired-in package template-haskell mapped to template-haskell-2.12.0.0 wired-in package ghc mapped to ghc-8.2.1 wired-in package dph-seq not found. wired-in package dph-par not found. *** Parser [source]: !!! Parser [source]: finished in 0.00 milliseconds, allocated 0.129 megabytes *** Desugar: *** Simplify [expr]: !!! Simplify [expr]: finished in 0.00 milliseconds, allocated 0.109 megabytes *** CorePrep [expr]: !!! CorePrep [expr]: finished in 15.63 milliseconds, allocated 1.545 megabytes *** ByteCodeGen [Ghci1]: !!! ByteCodeGen [Ghci1]: finished in 0.00 milliseconds, allocated 0.132 megabytes Access violation in generated code when reading 00000000046710f6