With GHC 6.4, interpreted or compiled, on Windows and Mac OS X, evaluating the expression (4^(4^44))::Integer causes a crash.

On Mac, the message is:
   ___         ___ _
  / _ \ /\  /\/ __(_)
 / /_\// /_/ / /  | |      GHC Interactive, version 6.4, for Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Loading package base-1.0 ... linking ... done.
Prelude> 4^(4^44)::Integer
bash: [539: 1] tcsetattr: Operation not supported
Segmentation fault
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