[GHC] #13233: typePrimRep panic while compiling GHC with profiling

[GHC]

#13233: typePrimRep panic while compiling GHC with profiling
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        Reporter:  bgamari           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 In general all of this tick business is terribly fragile since there is no
 strong invariant (as far as I know) dictating where they might appear. I
 wonder if it would be reasonable a put inplace a Core invariant (checked
 by `CoreLint`) stating that "a tick must not sit directly inside of a type
 abstraction, type application, or cast. That is, we would normalize all
 things of the form,
 {{{
 (tick<t> e) @ty  --> tick<t> (e @ty)
 }}}

 It already seems like we try to do something along these lines, but it's
 not strongly checked.

 Does this make sense?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13233#comment:18>
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