[GHC] #3903: DPH bad sliceP causes RTS panic "allocGroup: requested zero blocks"

[GHC]

#3903: DPH bad sliceP causes RTS panic "allocGroup: requested zero blocks"
---------------------------------+------------------------------------------
    Reporter:  benl              |       Owner:  benl                 
        Type:  bug               |      Status:  new                  
    Priority:  normal            |   Component:  Data Parallel Haskell
     Version:  6.13              |    Keywords:                       
          Os:  Unknown/Multiple  |    Testcase:                       
Architecture:  Unknown/Multiple  |     Failure:  Compile-time crash   
---------------------------------+------------------------------------------
 {{{
 $ ghci -XPArr
 ...
 Prelude> :m GHC.PArr
 Prelude GHC.PArr> sliceP 10 10 [::]
 <interactive>: internal error: allocGroup: requested zero blocks
     (GHC version 6.12.1 for i386_apple_darwin)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug
 Abort trap
 }}}

 `sliceP 10 10 [::]` is bogus. This should have been picked up in the
 libraries before hitting the RTS assertion.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3903>
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