T7019.stderr\should_fail\typecheck\tests\testsuite - delta/haskell.git - gitlab.haskell.org: ghc/ghc.git

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T7019.hs:11:12:
    Illegal constraint: forall a. c (Free c a)
    In the type ‘forall a. c (Free c a)’
    In the type declaration for ‘C’