testsuite/tests/typecheck/should_fail/T15796.stderr


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T15796.hs:6:3: error: [GHC-17440]
    • A newtype constructor must not have a context in its type
      MkN :: forall a. Show a => a -> N a
    • In the definition of data constructor ‘MkN’
      In the newtype declaration for ‘N’