[GHC] #15281: GHC 8.6.1 can't be bootstrapped with GHC 8.2.1

[GHC]

#15281: GHC 8.6.1 can't be bootstrapped with GHC 8.2.1
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  high              |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4863
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"d1c7239c037e267873658160b5c290f08f0d6502/ghc" d1c7239/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="d1c7239c037e267873658160b5c290f08f0d6502"
 configure: Fail when bootstrapping with GHC 8.2.1

 See #15281
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15281#comment:2>
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