If you know which commit is the cause of the problem you can try to:
git revert <commit SHA>
on your own machine and see if this fixes the problem for you.
On Tue, Jun 11, 2013 at 1:09 PM, Simon Peyton-Jones
Ian****
This getRegister bug is killing my Windows builds too; indeed every 32-bit build is broken, and that is stalling a lot of people, now including me.** **
Could you perhaps revert the patch (around 6 June) that caused this, until it’s sorted out? ****
Thanks****
Simon****
** **
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf o -hcsuf hc -static -H32m -O -Werror -Wall -H64m -O0 -package-name ghc-prim-0.3.1.0 -hide-all-packages -i -ilibraries/ghc-prim/. -ilibraries/ghc-prim/dist-install/build -ilibraries/ghc-prim/dist-install/build/autogen -Ilibraries/ghc-prim/dist-install/build -Ilibraries/ghc-prim/dist-install/build/autogen -Ilibraries/ghc-prim/. -optP-include -optPlibraries/ghc-prim/dist-install/build/autogen/cabal_macros.h -package rts-1.0 -package-name ghc-prim -XHaskell98 -XCPP -XMagicHash -XForeignFunctionInterface -XUnliftedFFITypes -XUnboxedTuples -XEmptyDataDecls -XNoImplicitPrelude -O2 -O -dcore-lint -fno-warn-deprecated-flags -no-user-package-db -rtsopts -odir libraries/ghc-prim/dist-install/build -hidir libraries/ghc-prim/dist-install/build -stubdir libraries/ghc-prim/dist-install/build -dynamic-too -c libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.hs -o libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.o -dyno libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.dyn_o****
ghc-stage1.exe: panic! (the 'impossible' happened)****
(GHC version 7.7.20130611 for i386-unknown-mingw32):****
getRegister(x86) I64[Sp]****
** **
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug*** *
** **
bash-3.1$****
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