#7422: GHC panics while trying to derive Generic for GADT with kind-lifted
phantom
parameter
-------------------------------+--------------------------------------------
Reporter: rpglover64 | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.4.1 | Keywords:
Os: MacOS X | Architecture: x86
Failure: Compile-time crash | Blockedby:
Blocking: | Related:
-------------------------------+--------------------------------------------
This may be a duplicate of #5884
Compiling the attached file gives the following crash:
{{{
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for i386-apple-darwin):
tcTyVarDetails ( tag{tv ae8} [tv] :: main:Main.ExprTag{tc rdD} )
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7422>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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