#13900: Core lint in BuildFlavour=perf-llvm -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: high | Milestone: 8.4.1 Component: Compiler | Version: 8.3 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Compile-time Unknown/Multiple | crash or panic Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- I found the following Core lint failure when compiling c9977385dca9536f18374242f713b1048a38dec5 with `BuildFlavour=perf-llvm`, {{{ "inplace/bin/ghc-stage1" -hisuf dyn_hi -osuf dyn_o -hcsuf dyn_hc -fPIC -dynamic -O -H64m -fllvm -Wall -hide-all-packages -i -ighc/. -ighc/stage2/build -Ighc/stage2/build -ighc/stage2/build/ghc/autogen -Ighc/stage2/build/ghc/autogen -optP-DGHCI -optP-include -optPghc/stage2/build/ghc/autogen/cabal_macros.h -package-id base-4.10.0.0 -package-id array-0.5.1.2 -package-id bytestring-0.10.8.2 -package-id directory-1.3.0.2 -package-id process-1.6.0.0 -package-id filepath-1.4.1.2 -package-id ghc-boot-8.3 -package-id ghc-8.3 -package-id unix-2.7.2.2 -package-id containers-0.5.10.2 -package-id deepseq-1.4.3.0 -package-id ghci-8.3 -package-id haskeline-0.7.4.0 -package-id time-1.8.0.1 -package- id transformers-0.5.2.0 -Wall -fno-warn-name-shadowing -XHaskell2010 -O2 -dcore-lint -dcmm-lint -no-hs-main -threaded -no-user-package-db -rtsopts -Wnoncanonical-monad-instances -odir ghc/stage2/build -hidir ghc/stage2/build -stubdir ghc/stage2/build -c ghc/./GHCi/UI/Tags.hs -o ghc/stage2/build/GHCi/UI/Tags.dyn_o *** Core Lint errors : in result of Simplifier *** <no location info>: warning: [RHS of $wgo_XtpE :: [Name] -> Session -> State# RealWorld -> (# State# RealWorld, [[TagInfo]] #)] Rule "SC:$wgo0": lhs type: (# State# RealWorld, [[TagInfo]] #) rhs type: (# State# RealWorld, [Maybe TyThing] #) *** Offending Program *** (see attached) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13900 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler