[GHC] #7736: Parallel array enumeration causes compiler panic (enumFromToP)

[GHC]

#7736: Parallel array enumeration causes compiler panic (enumFromToP)
-------------------------------+--------------------------------------------
Reporter:  amosrobinson        |          Owner:                  
    Type:  bug                 |         Status:  new             
Priority:  normal              |      Component:  Compiler        
 Version:  7.6.2               |       Keywords:                  
      Os:  Unknown/Multiple    |   Architecture:  Unknown/Multiple
 Failure:  Compile-time crash  |      Blockedby:                  
Blocking:                      |        Related:                  
-------------------------------+--------------------------------------------
 Enumeration doesn't work in parallel array comprehensions:

 {{{
 nums = [: 0 .. 100 :]
 }}}

 causes a compiler panic. Interestingly, the panic seems to happen before
 typechecking because if we add some nonsense:

 {{{
 other = 5 / "bad"
 nums = [: 0 .. 100 :]
 }}}

 it still panics.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7736>
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