[GHC] #5285: Core lint error in T3001-2 [7.0 regression]

[GHC]

#5285: Core lint error in T3001-2 [7.0 regression]
---------------------------------+------------------------------------------
    Reporter:  simonmar          |        Owner:  simonpj           
        Type:  bug               |       Status:  new               
    Priority:  highest           |    Milestone:  7.2.1             
   Component:  Compiler          |      Version:  7.0.3             
    Keywords:                    |     Testcase:                    
   Blockedby:                    |   Difficulty:                    
          Os:  Unknown/Multiple  |     Blocking:                    
Architecture:  Unknown/Multiple  |      Failure:  Compile-time crash
---------------------------------+------------------------------------------

Comment(by simonmar):

 This one looks similar (last night's build on x86_64/Linux):

 {{{
 =====> signals004(profasm) 11 of 17 [0, 0, 0]
 cd . && '/64playpen/simonmar/nightly/HEAD-cam-04-unx/x86_64-unknown-
 linux/inplace/bin/ghc-stage2' -fforce-recomp -dcore-lint -dcmm-lint -dno-
 debug-output -no-user-package-conf -rtsopts  -o signals004 signals004.hs
 -O -prof -auto-all -fasm -package unix  >signals004.comp.stderr 2>&1
 Compile failed (status 256) errors were:
 [1 of 1] Compiling Main             ( signals004.hs, signals004.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 a_s1T6 :: GHC.Prim.Int#
                       -> GHC.Prim.State# GHC.Prim.RealWorld
                       -> (# GHC.Prim.State# GHC.Prim.RealWorld, () #)]
     Demand type has  2  arguments, rhs has  0 arguments,  a_s1T6
     Binder's strictness signature: DmdType LL
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5285#comment:3>
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