[GHC] #13695: Highly nested UNPACKed data causes panic

[GHC]

#13695: Highly nested UNPACKed data causes panic
---------------------------------+----------------------------------------
        Reporter:  ryanreich     |                Owner:  (none)
            Type:  bug           |               Status:  new
        Priority:  high          |            Milestone:  8.2.1
       Component:  Compiler      |              Version:  8.2.1-rc2
      Resolution:                |             Keywords:
Operating System:  Linux         |         Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:  #3990         |  Differential Rev(s):
       Wiki Page:                |
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Comment (by RyanGlScott):

 I wasn't able to reproduce this using `cabal build` or `stack build`
 either.

 Note that I obtained GHC 8.2.1:

 {{{
 $ /opt/ghc/8.2.1/bin/ghc --version
 The Glorious Glasgow Haskell Compilation System, version 8.2.0.20170505
 }}}

 and GHC HEAD:

 {{{
 $ /opt/ghc/head/bin/ghc --version
 The Glorious Glasgow Haskell Compilation System, version 8.3.20170509
 }}}

 from https://launchpad.net/~hvr/+archive/ubuntu/ghc

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13695#comment:4>
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