[Haskell-cafe] GHC 7.6.3 and Plugins

Fabian Bergmark fabian.bergmark at gmail.com
Mon Feb 24 13:12:12 UTC 2014

Im using the plugins library and am unable get it to work with user
defined types. I.e. evaluating the string "id :: Int -> Int" works,
but "id :: Test -> Test" yield the runtime-error.

test: /tmp/MXXXXX27601.o: unknown symbol

I have created a small compiling example of the bug here


I have tried to move the data-type to a separate library without success.

Curiously, loading the library exposing the data-type in GHCi, and
running eval "id :: Test -> Test" works and yields the correct result.

More information about the Haskell-Cafe mailing list