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Sun Aug 2 11:27:17 EDT 2015

GHC error

make -C ~/meta/siso all clean
make: Entering directory `/home/tom/pub/darcs/meta/siso'
ghc Test.hs
[ 9 of 10] Compiling Code             ( Code.hs, Code.o )
ghc: panic! (the 'impossible' happened)
  (GHC version 7.4.1 for x86_64-unknown-linux):
	compiler/rename/RnSource.lhs:429:14-81: Irrefutable pattern failed for pattern Data.Maybe.Just (inst_tyvars,
                                                        _,
                                                        SrcLoc.L _ cls,
                                                        _)


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



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