simonmar-win32-head (x86 Windows HEAD), build 582, Failure

[Builder]

simonmar-win32-head (x86 Windows HEAD), build 582

Build failed
Details: http://darcs.haskell.org/ghcBuilder/builders/simonmar-win32-head/582.html

git clone                    | Success
create mk/build.mk           | Success
get subrepos                 | Success
repo versions                | Success
touching clean-check files   | Success
setting version date         | Success
booting                      | Success
configuring                  | Success
creating check-remove-before | Success
compiling                    | Failure: Just (ExitFailure 2)

Build failed
Details: http://darcs.haskell.org/ghcBuilder/builders/simonmar-win32-head/582.html

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"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] simplCore/SAT.lhs -o compiler/stage2/build/SAT.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] Case.lhs -o compiler/stage2/build/LiberateCase.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] tLevels.lhs -o compiler/stage2/build/SetLevels.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] FloatOut.lhs -o compiler/stage2/build/FloatOut.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] e/FloatIn.lhs -o compiler/stage2/build/FloatIn.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] lMonad.lhs -o compiler/stage2/build/SimplMonad.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] SimplEnv.lhs -o compiler/stage2/build/SimplEnv.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] lUtils.lhs -o compiler/stage2/build/SimplUtils.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] Simplify.lhs -o compiler/stage2/build/Simplify.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] simplCore/CSE.lhs -o compiler/stage2/build/CSE.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] mplCore.lhs -o compiler/stage2/build/SimplCore.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] Coverage.lhs -o compiler/stage2/build/Coverage.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] r/DsCCall.lhs -o compiler/stage2/build/DsCCall.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] Foreign.lhs -o compiler/stage2/build/DsForeign.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O     [...] r/Desugar.lhs -o compiler/stage2/build/Desugar.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O        -package-name ghc-7.5.20120503  -hide-all-pack [...] f p_hi -osuf  p_o -hcsuf p_hc -c compiler/stage2/build/LibFFI.hs -o compiler/stage2/build/LibFFI.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O        -package-name ghc-7.5.20120503  -hide-all-packages  -i -icompiler/basicTypes -icompiler/cmm -icompiler/codeGen -icompiler/coreSyn -icompiler/deSugar -icompiler/ghci -icompiler/hsSyn -icompiler/iface -icompiler/llvmGen -icompiler/main -icompiler/nativeGen -icompiler/parser -icompiler/prelude -icompiler/profiling -icompiler/rename -icompiler/simplCore -icompiler/simplStg -icompiler/specialise -icompiler/stgSyn -i [...] rds -XForeignFunctionInterface -XEmptyDataDecls -XTypeSynonymInstances -XMultiParamTypeClasses -XFlexibleInstances -XRankNTypes -XScopedTypeVariables -XDeriveDataTypeable -XBangPatterns -DGHCI_TABLES_NEXT_TO_CODE -DSTAGE=2 -O2    -no-user-package-conf -rtsopts            -odir compiler/stage2/build -hidir compiler/stage2/build -stubdir compiler/stage2/build  -hisuf p_hi -osuf  p_o -hcsuf p_hc -c compiler/ghci/ByteCodeGen.lhs -o compiler/stage2/build/ByteCodeGen.p_o
"inplace/bin/ghc-stage1.exe" -prof    -H32m -O        -package-name ghc-7.5.20120503  -hide-all-packages  -i -icompiler/basicTypes -icompiler/cmm -icompiler/codeGen -icompiler/coreSyn -icompiler/deSugar -icompiler/ghci -icompiler/hsSyn -icompiler/iface -icompiler/llvmGen -icompiler/main -icompiler/nativeGen -icompiler/parser -icompiler/prelude -icompiler/profiling -icompiler/rename -icompiler/simplCore -icompiler/simplStg -icompiler/specialise -icompiler/stgSyn -icompiler/stranal -icompiler/typecheck -icompiler/types -icompiler/utils -icompiler/vectorise  -icompiler/stage2/build -icompiler/stage2/build/autogen  -Icompiler/stage2/build -Icompiler/stage2/build/autogen  -Icompiler/../rts/dist/build -Icompiler/stage2 -Icompiler/. -Icompiler/parser -Icompiler/utils      -optP-DGHCI  -optP-include -optPcompiler/stage2/build/autogen/cabal_macros.h  -package Cabal-1.14.0 -package Win32-2.2.1.0 -package array-0.3.0.3 -package base-4.5.0.0 -package bin-package-db-0.0.0.0 -package bytestring-0.10.0.0 -package containers-0.5.0.0 -package directory-1.1.0.1 -package filepath-1.2.0.1 -package hoopl-3.8.7.2 -package hpc-0.5.1.0 -package process-1.1.0.0 -package template-haskell-2.6.0.0 -package time-1.4    -Wall -fno-warn-name-shadowing -fno-warn-orphans -XHaskell98 -XNondecreasingIndentation -XCPP -XMagicHash -XUnboxedTuples -XPatternGuards -XForeignFunctionInterface -XEmptyDataDecls -XTypeSynonymInstances -XMultiParamTypeClasses -XFlexibleInstances -XRankNTypes -XScopedTypeVariables -XDeriveDataTypeable -XBangPatterns -DGHCI_TABLES_NEXT_TO_CODE -DSTAGE=2 -O2    -no-user-package-conf -rtsopts            -odir compiler/stage2/build -hidir compiler/stage2/build -stubdir compiler/stage2/build  -hisuf p_hi -osuf  p_o -hcsuf p_hc -c compiler/main/HscMain.hs -o compiler/stage2/build/HscMain.p_o
ghc-stage1.exe: panic! (the 'impossible' happened)
  (GHC version 7.5.20120503 for i386-unknown-mingw32):
	compiler\simplCore\SimplUtils.lhs:1668:5-25: Irrefutable pattern failed for pattern ((_, _, rhs1) : _)


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

compiler/ghc.mk:439: recipe for target `compiler/stage2/build/HscMain.p_o' failed
make[2]: *** [compiler/stage2/build/HscMain.p_o] Error 1
Makefile:64: recipe for target `all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory `/cygdrive/d/slave/head/builder/tempbuild/build'