panic while compiling Cabal-1.6.0.1
While compiling Cabal-1.6.0.1, as packaged with Cabal-0.6.0, I got:
[16 of 50] Compiling Distribution.Simple.Utils ( Distribution/Simple/Utils.hs, dist/build/Distribution/Simple/Utils.o )
ghc-6.8.2: panic! (the 'impossible' happened)
(GHC version 6.8.2 for x86_64-unknown-linux):
applyTypeToArgs
unix-2.3.0.0:System.Posix.Signals.a38{v rov8} [gid]
(unix-2.3.0.0:System.Posix.Signals.a5{v rov7} [gid]
`cast` (base:GHC.Prim.sym{(w) tc 34v}
(base:Foreign.C.Types.:CoCInt{tc r1dN})
:: <pred>base:GHC.Int.Int32{tc 3V}
~
<nt>base:Foreign.C.Types.CInt{tc r17X}))
unix-2.3.0.0:System.Posix.Signals.Ignore{v rov6} [gid]
(base:Data.Maybe.Nothing{v r6E} [gid]
@ <nt>unix-2.3.0.0:System.Posix.Signals.SignalSet{tc rov5})
eta{v apCg} [lid]
(# base:GHC.Prim.State#{(w) tc 32q}
base:GHC.Prim.RealWorld{(w) tc 31E},
<nt>unix-2.3.0.0:System.Posix.Signals.SignalSet{tc rov5} #)