ANNOUNCE: GHC version 6.8.2

Simon Marlow simonmarhaskell at
Wed Jan 2 07:48:28 EST 2008

alpheccar wrote:
> Was someone able to build ghc 6.8.2 on PPC with OS X 10.4 (Tiger) ?
> I had no problems to build the 6.8.1 but with 6.8.2, I get the error:
> ../../compiler/stage1/ghc-inplace -package-name base- 
> -hide-all-packages -split-objs -i -idist/build/autogen -idist/build -i. 
> -Idist/build -Iinclude -#include "HsBase.h" -odir dist/build -hidir 
> dist/build -stubdir dist/build -package rts-1.0 -O -fglasgow-exts 
> -package-name base -XCPP -idist/build  -H16m -O -O -Rghc-timing 
> -fgenerics -c Data/Generics/Twins.hs -o 
> dist/build/Data/Generics/Twins.o  -ohi dist/build/Data/Generics/Twins.hi
> ghc-6.8.2: panic! (the 'impossible' happened)
>   (GHC version 6.8.2 for powerpc-apple-darwin):
>         lookupVers1 base:GHC.Prim sym{tc}

This is a new bug in 6.8.2 that we discovered just before Christmas:

the workaround is simple: just make clean in libraries/base.


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