Error compiling Crypto-4.1.0 on ghc-6.8.3
ghc-6.8.3: panic! (the 'impossible' happened)
(GHC version 6.8.3 for i386-unknown-linux):
RegAllocLinear.getStackSlotFor: out of stack slots, try -fregs-graph
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug