[GHC] #14413: Profiling breaks determinism

[GHC]

#14413: Profiling breaks determinism
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           Reporter:  bgamari        |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.4.1
          Component:  Compiler       |           Version:  8.2.1
           Keywords:  determinism    |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 While looking at #5889 I noticed that `CostCentre` currently includes a
 `Unique` (although it's represented as an `Int` for reasons that aren't
 relevant here; I change this in Phab:D4148). This unique identifies the
 cost centre and appears to be derived from the unique of a binder. This
 presumably breaks determinism.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14413>
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