[GHC] #13479: Core Lint issues during slowtest

[GHC]

#13479: Core Lint issues during slowtest
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #10181            |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * related:   => #10181


Comment:

 This is very strange since it seems that `go_s54c` is certainly arity one.
 Moreover, note how `lvl_s54d`'s IdInfo thinks that it has arity 1 (which
 is presumably why `go_s54c` has call arity 2.

 It looks like this is related to #1018, which is interesting since I also
 see some unexpected passes from tests marked as broken due to that ticket
 (e.g. `read029`).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13479#comment:1>
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