testsuite/tests/deriving/should_compile/T16179.stderr


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T16179.hs:7:30: warning: [-Wderiving-defaults (in -Wdefault)]
    • Both DeriveAnyClass and GeneralizedNewtypeDeriving are enabled
      Defaulting to the DeriveAnyClass strategy for instantiating C
      Use DerivingStrategies to pick a different strategy
    • In the newtype declaration for ‘T’