On Wed, Nov 30, 2011 at 05:47:35AM -0800, Simon Marlow wrote:
>
> Include a stack trace in the panic message, when GHC is compiled profiled.
>
> I tried this out on the panic we're currently getting for #3103:
>
> ghc-stage2: panic! (the 'impossible' happened)
> (GHC version 7.3.20111128 for x86_64-unknown-linux):
> tcIfaceGlobal (local): not found:
> base:GHC.Word.W#{d 6w}
> [(32R, Type constructor `base:GHC.Word.Word{tc 32R}'),
> (r6O, Identifier `base:GHC.Word.$fNumWord{v r6O}'),
> (r6P, Identifier `base:GHC.Word.$fEqWord{v r6P}'),
> (r6Q, Identifier `base:GHC.Word.$fNumWord1{v r6Q}'),
> (r6R, Identifier `base:GHC.Word.$fNumWord2{v r6R}'),
> (r6S, Data constructor `base:GHC.Word.W#{d r6S}'),
> (r6U, Identifier `base:GHC.Word.W#{v r6U}'),
> (r75, Identifier `base:GHC.Word.$fNumWord_$csignum{v r75}'),
> (r76, Identifier `base:GHC.Word.$fEqWord_$c/={v r76}'),
> (r77, Identifier `base:GHC.Word.$fEqWord_$c=={v r77}')]
> { Main.main
> GHC.defaultErrorHandler
> GHC.runGhc
> GhcMonad.>>=
Nice! But is there any need for the increasing indentation? It'll never
have any branches, will it?
May also be nice to put "Stack trace:" or something at the top.
Thanks
Ian
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