testsuite/tests/partial-sigs/should_compile/T18008.stderr


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T18008.hs:5:43: warning: [-Wpartial-type-signatures (in -Wdefault)]
    • Found type wildcard ‘_’ standing for ‘String’
    • In the type ‘(forall a. Show a => a -> String) -> _’
      In the type signature: f :: (forall a. Show a => a -> String) -> _