[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
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        Reporter:  pjljvdlaar        |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Windows           |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by mpickering):

 Triggers an assertion failure with a `DEBUG` compiler.

 {{{
 [1 of 4] Compiling FuncId2          ( FuncId2.hs, FuncId2.o )
 [2 of 4] Compiling Ident2           ( Ident2.hs, Ident2.o )
 [3 of 4] Compiling TxsDefs2         ( TxsDefs2.hs, TxsDefs2.o )
 ghc-stage2: panic! (the 'impossible' happened)
   (GHC version 8.3.20170412 for x86_64-apple-darwin):
         ASSERT failed! file compiler/typecheck/TcRnExports.hs, line 604

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13644#comment:4>
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