[GHC] #8882: internal error (deriving generic / cyclical imports?)

[GHC]

#8882: internal error (deriving generic / cyclical imports?)
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        Reporter:  mf825       |            Owner:
            Type:  bug         |           Status:  new
        Priority:  normal      |        Milestone:
       Component:  Compiler    |          Version:  7.6.3
      Resolution:              |         Keywords:  panic
Operating System:  Linux       |     Architecture:  x86_64 (amd64)
 Type of failure:  GHCi crash  |       Difficulty:  Unknown
       Test Case:              |       Blocked By:
        Blocking:              |  Related Tickets:
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Comment (by mf825):

 @thoughpolice: you are right, WDF got shrunk away at some point, but the
 fact that you are getting this far without the bug showing proves that it
 is gone in 7.8 (assuming this is what you used to run crash.sh).  great!

 @simon: ghc-7.6.3 does not understand -fno-warn-amp, and i could not find
 it in the manual either.  if you still think it is relevant, could you
 give me another hint?

 @monoidal: yes, that seems likely.  in my case, the -XDerivingGeneric is
 in module Default, and the hs-boot file belongs to module Universes.  but
 when i disable DerivingGeneric in Default, the problem goes away.

 i think i'll try to get 7.8 running now.  Ii am ok with closing this
 issue.

 thanks everybody for the great help!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8882#comment:4>
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