ghci starting on AMD64 failed

trying to start ghci on an AMD64 Debian/Linux unstable
failes with:
ghci
   ___         ___ _
  / _ \ /\  /\/ __(_)
 / /_\// /_/ / /  | |      GHC Interactive, version
6.4, for Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Loading package base-1.0 ... ghc-6.4:
/usr/local/lib/ghc-6.4/HSbase.o: unknown architecture
ghc-6.4: panic! (the `impossible' happened, GHC version
6.4):
        loadObj: failed

Please report it as a compiler bug to
glasgow-haskell-bugs@haskell.org,
or http://sourceforge.net/projects/ghc/.

Regards
Friedrich

Trac metadata

Trac field	Value
Version	6.4
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	ResolvedNoReason
Component	GHCi
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ghci starting on AMD64 failed