[GHC] #14123: Figure out invariants surrounding ticks in Core

[GHC]

#14123: Figure out invariants surrounding ticks in Core
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  highest           |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13233, #14122,   |  Differential Rev(s):
  #8472, #14406                      |
       Wiki Page:                    |
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Comment (by bgamari):

 Phab:D3925 is a differential that I was working on some time ago asserting
 that primitive strings aren't ticked. The fact that the assertion fails is
 a canary suggesting that something is amiss here.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14123#comment:7>
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