IS THIS A BUG ? rename/RnEnv.lhs:238: Non-exhaustive patterns in function get_tycon_key

Hello, The following code, when compiled with GHC 4.08.1 under an i586 Archictecute with Red Hat Linux 6.2 produces this error message: ERROR MESSAGE: Compilation Dump for: /usr/local/lib/ghc-4.08.1/hsc /tmp/ghc1430.cpp 2 erros

panic! (the `impossible' happened) :-O

Hi, I get the following message error when compiling a Haskell program with GHC. = Compilation Dump for: /usr/local/lib/ghc-4.08.1/hsc /tmp/ghc6065.cpp 2 erros -fglasgow-exts -fignore-interface-pragmas