testsuite/tests/warnings/should_compile/T18862a.stderr


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T18862a.hs:5:9: warning: [GHC-58520] [-Wtype-equality-requires-operators (in -Wdefault)]
    The use of ‘~’ without TypeOperators
    will become an error in a future GHC release.
    Suggested fix: Perhaps you intended to use TypeOperators