[GHC] #10151: Compilation failed on mac, ghc: panic! (the 'impossible' happened)

[GHC]

#10151: Compilation failed on mac, ghc: panic! (the 'impossible' happened)
-------------------------------+-------------------------------------------
        Reporter:  jaseemabid  |                   Owner:
            Type:  bug         |                  Status:  infoneeded
        Priority:  normal      |               Milestone:
       Component:  GHCi        |                 Version:  7.8.3
      Resolution:              |                Keywords:
Operating System:  MacOS X     |            Architecture:  Unknown/Multiple
 Type of failure:  GHCi crash  |               Test Case:
      Blocked By:              |                Blocking:
 Related Tickets:              |  Differential Revisions:
-------------------------------+-------------------------------------------

Comment (by jaseemabid):

 I hit a similar error and it might be related.

     Source: https://github.com/jaseemabid/functorrent (Its a different
 project, but similar build and libraries)
     Version: ac4100f4f9ed09fcba4c482f3c245fc5837324b1

 $ cabal test

     Preprocessing library functorrent-0.1.0.0...
     In-place registering functorrent-0.1.0.0...
     Preprocessing test suite 'lisper-test' for functorrent-0.1.0.0...
     Linking dist/build/lisper-test/lisper-test ...
     Undefined symbols for architecture x86_64:
       "_functorrentzm0zi1zi0zi0_FuncTorrentziUtils_zdwsplitN_closure",
 referenced from:
           _S7Tj_srt in libHSfunctorrent-0.1.0.0.a(Peer.o)
           _SeM6_srt in libHSfunctorrent-0.1.0.0.a(Tracker.o)
       "_functorrentzm0zi1zi0zi0_FuncTorrentziUtils_zdwsplitN_info",
 referenced from:
           _c8uZ_info in libHSfunctorrent-0.1.0.0.a(Peer.o)
           _c8yP_info in libHSfunctorrent-0.1.0.0.a(Peer.o)
 _functorrentzm0zi1zi0zi0_FuncTorrentziTracker_zdwurlEncodeHash_info in
 libHSfunctorrent-0.1.0.0.a(Tracker.o)
           _cfnK_info in libHSfunctorrent-0.1.0.0.a(Tracker.o)
     ld: symbol(s) not found for architecture x86_64
     clang: error: linker command failed with exit code 1 (use -v to see
 invocation)


     Public build: https://travis-
 ci.org/jaseemabid/functorrent/builds/55397669

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10151#comment:2>
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