Parsing LANGUAGE pragma causes GHC panic

Parsing LANGUAGE pragma like this (notice the '*'):

{-# LANGUAGE * #-}

causes:

ghc: panic! (the 'impossible' happened)
  (GHC version 6.10.4 for i386-unknown-linux):
	getOptions'.parseLanguage(2) went past eof token

Instead of the '*' you can write another character like '+', '-' etc. I'm using GHC from Arch Linux's repository (package: ghc 6.10.4-1).

Trac metadata

Trac field	Value
Version	6.10.4
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler (Parser)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture	Unknown/Multiple