[GHC] #8383: "tagToEnum# (0# ==# 1#) :: Bool" causes CASEFAIL in ghci

[GHC]

#8383: "tagToEnum# (0# ==# 1#) :: Bool" causes CASEFAIL in ghci
---------------------------------+----------------------------------
        Reporter:  rwbarton      |            Owner:
            Type:  bug           |           Status:  new
        Priority:  highest       |        Milestone:  7.8.1
       Component:  GHCi          |          Version:  7.7
      Resolution:                |         Keywords:
Operating System:  Linux         |     Architecture:  x86_64 (amd64)
 Type of failure:  None/Unknown  |       Difficulty:  Unknown
       Test Case:                |       Blocked By:
        Blocking:                |  Related Tickets:
---------------------------------+----------------------------------

Comment (by Simon Peyton Jones <simonpj@?>):

 In [changeset:a9649c48681054d86b6a1e33118aa12903a4fbfd/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="a9649c48681054d86b6a1e33118aa12903a4fbfd"
 Fix the bytecode genreation for tagToEnum# (Trac #8383)

 Reid Barton's diagnosis was right on the mark, though the fix
 wasn't quite right.  See Note [Implementing tagToEnum#].

 As usual I did some refactoring.
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8383#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler