warnings::unused claims itself unmaintained and recommends Test::Vars by the same author.
لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re^2: "Only Used Once" warning for lexicals by choroba
in thread "Only Used Once" warning for lexicals by LanX

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