ghci crash from :l

i got the following from trying to :l this file

Prelude> :l tmp.hs
ghc: panic! (the 'impossible' happened)
  (GHC version 6.10.3 for i386-apple-darwin):
	getOptions'.parseLanguage(2) went past eof token

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

Edited Mar 09, 2019 by Ian Lynagh -

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ghci crash from :l