#5884: GHC panics while trying to derive a Generic instance for Complex a
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Reporter: mux | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.4.1 | Keywords:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
Failure: Compile-time crash | Testcase:
Blockedby: | Blocking:
Related: |
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Using the StandaloneDeriving and DeriveGeneric extensions, GHC panics when
deriving a Generic instance for Complex a with the following error:
GHCi, version 7.4.1: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
[1 of 1] Compiling Main ( TestCase.hs, interpreted )
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for x86_64-unknown-freebsd):
tcTyVarDetails
( a{tv ahY} [tv] :: ghc-prim:GHC.Prim.*{(w) tc 34d} )
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5884>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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