[GHC] #13536: Program which terminates instantly in GHC 8.0.2 runs for minutes with 8.2.1

[GHC]

#13536: Program which terminates instantly in GHC 8.0.2 runs for minutes with 8.2.1
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  merge
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:  T13536
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3437
       Wiki Page:                    |
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Comment (by Joachim Breitner <mail@…>):

 In [changeset:"ddc05912565aedd6ef46236906fa06cdb3e5e06c/ghc"
 ddc05912/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="ddc05912565aedd6ef46236906fa06cdb3e5e06c"
 Add a second regression test for #13536

 which counts allocations instead of observing recomputation directly.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13536#comment:28>
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