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Core lint failure in stage 3 build

A stage 3 build is currently failing with a Core Lint error:

"inplace/bin/ghc-stage2"   -H32m -O     -package-name ghc-7.1.20110630 -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/stage3/build -icompiler/stage3/build/autogen -Icompiler/stage3/build -Icompiler/stage3/build/autogen -Icompiler/../libffi/build/include -Icompiler/stage2 -Icompiler/../libraries/base/cbits -Icompiler/../libraries/base/include -Icompiler/. -Icompiler/parser -Icompiler/utils   -optP-DGHCI -optP-include -optPcompiler/stage3/build/autogen/cabal_macros.h -package Cabal-1.11.0 -package array-0.3.0.2 -package base-4.3.1.0 -package bin-package-db-0.0.0.0 -package bytestring-0.9.2.0 -package containers-0.4.0.0 -package directory-1.1.0.0 -package filepath-1.2.0.0 -package hoopl-3.8.7.0 -package hpc-0.5.0.6 -package old-time-1.0.0.6 -package process-1.0.1.4 -package template-haskell-2.5.0.0 -package unix-2.4.1.0  -Wall -fno-warn-name-shadowing -fno-warn-orphans -XHaskell98 -XNondecreasingIndentation -XCPP -XMagicHash -XUnboxedTuples -XPatternGuards -XForeignFunctionInterface -XEmptyDataDecls -XTypeSynonymInstances -XMultiParamTypeClasses -XFlexibleInstances -XRank2Types -XScopedTypeVariables -XDeriveDataTypeable -DGHCI_TABLES_NEXT_TO_CODE -DSTAGE=3 -H64m -O -fasm -DDEBUG -dcore-lint -debug +RTS -c -RTS -no-user-package-conf -rtsopts     -odir compiler/stage3/build -hidir compiler/stage3/build -stubdir compiler/stage3/build -hisuf hi -osuf  o -hcsuf hc -c compiler/hsSyn/HsExpr.lhs -o compiler/stage3/build/HsExpr.o
*** Core Lint errors : in result of Simplifier SimplMode {Phase = 0 [final],
                                                          inline,
                                                          rules,
                                                          eta-expand,
                                                          case-of-case} max-iterations=4 ***
<no location info>:
    [RHS of lvl_s6KV :: GHC.Real.Rational
                        -> HsExpr.HsExpr Name.Name -> Outputable.SDoc]
    Demand type has  2  arguments, rhs has  1 arguments,  lvl_s6KV
    Binder's strictness signature: DmdType AS
Trac metadata
Trac field Value
Version 7.1
Type Bug
TypeOfFailure OtherFailure
Priority highest
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
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