testsuite/tests/ffi/should_fail/T3066.stderr


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T3066.hs:7:1: error: [GHC-31136]
    • Unacceptable argument type in foreign declaration:
        ‘forall u. Ptr ()’ is not a data type
    • When checking declaration:
        foreign import ccall safe bla :: (forall u. X u) -> IO ()