Real World Haskell book example issue

load !SimpleResult.hs from the chapter 5 of the book try to output alist "result" I've got this:

: panic! (the 'impossible' happened)
  (GHC version 6.10.1 for i386-unknown-mingw32):
        loadObj: failed

Trac metadata

Trac field	Value
Version	6.10.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	GHCi
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