[Haskell-cafe] Bizarre GHC error.

[Brandon Allbery]

It's using a GHC plugin that uses an SMT solver for Nat constraints, and
the solver threw an error. You may need to talk to the author of the solver
plugin.

On Sun, Aug 5, 2018 at 5:31 PM David Banas <capn.freako at gmail.com> wrote:

> Has anyone seen this kind of error from GHC?
>
> dca9047d694f:concat-learn a594349$ stack build :lenna
> concat-learn-0.2.0.0: build (lib + exe)
> Preprocessing library concat-learn-0.2.0.0...
> [6 of 6] Compiling ConCat.Learn.CNN.Conv ( src/ConCat/Learn/CNN/Conv.hs,
> .stack-work/dist/x86_64-osx/Cabal-1.24.2.0/build/ConCat/Learn/CNN/Conv.o )
> user error (Unexpected result from the SMT solver:
>   Expected: success
>   Result: (error "line 1515 column 22: unknown constant tn_1" )
> )
>
> --  While building custom Setup.hs for package concat-learn-0.2.0.0 using:
>
> /Users/a594349/.stack/setup-exe-cache/x86_64-osx/Cabal-simple_mPHDZzAJ_1.24.2.0_ghc-8.0.2
> --builddir=.stack-work/dist/x86_64-osx/Cabal-1.24.2.0 build
> lib:concat-learn exe:lenna --ghc-options " -ddump-hi -ddump-to-file"
>     Process exited with code: ExitFailure 1
>
> I started seeing it when I started trying to use the someNatVal function.
>
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-- 
brandon s allbery kf8nh
allbery.b at gmail.com
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