testsuite/tests/typecheck/should_fail/T9201.stderr


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T9201.hs:10:17: error:
    • Expected kind ‘x’, but ‘a’ has kind ‘y’
    • In the first argument of ‘f’, namely ‘a’
      In the second argument of ‘d’, namely ‘(f a)’
      In the type signature: ret :: d a (f a)