[GHC] #13644: overloaded name used in record pattern matching leads to panic! (the 'impossible' happened) in ghc

[GHC]

#13644: overloaded name used in record pattern matching leads to panic!  (the
'impossible' happened) in ghc
-------------------------------------+-------------------------------------
        Reporter:  pjljvdlaar        |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:
  crash or panic                     |  rename/should_fail/T13644
      Blocked By:                    |             Blocking:
 Related Tickets:  #13840, #13973,   |  Differential Rev(s):  Phab:D3988
  #14087                             |
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by adamgundry):

 * testcase:   => rename/should_fail/T13644
 * status:  new => patch
 * differential:   => Phab:D3988


Comment:

 Looking at this again, I realised that the fix to #13847 is entirely
 analogous. Diff away!

 @mpickering I probably broke this when implementing ORF, but AFAICS there
 is no ORF-related reason for us to compare field labels here, because we
 already know the selector names we want.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13644#comment:19>
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