[GHC] #14779: Compiling with -g fails -lint-core checks

[GHC]

#14779: Compiling with -g fails -lint-core checks
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        Reporter:  niteria           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.4.2
       Component:  Compiler          |              Version:  8.3
  (Debugging)                        |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14122, #14123,   |  Differential Rev(s):  phab:D4423
  #8472, #14406                      |
       Wiki Page:                    |
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Comment (by niteria):

 Relying on correctness with CSE seems a bit brittle though. If I `-fno-
 cse` I'm back to the original problem.

 That leads me to believe that 2 things need to happen:
 1. CoreLint (and probably CoreToSTG) needs to accept Core like above.
 2. CSE should fix it.

 Alternatively we could figure out how it happens and never let it happen.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14779#comment:20>
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