[Haskell-cafe] haddock complains about unknown symbol in .a file

[Johannes Waldmann]

Dear all, what is happening here?

http://hackage.haskell.org/package/satchmo-2.9.9.1/reports/1/log

The library is built, but haddock fails with

haddock:
/home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/minisat-0.1.2/libHSminisat-0.1.2.a:
unknown symbol `_ZGVZN7Minisat6Option13getOptionListEvE7options'

Why is haddock complaining, but ghc is not?

Any pointers appreciated (to explain and solve the problem -
I think there's a work-around of uploading documentation to hackage
but that does not feel right)

- J.W.