Maybe the compiler's not the right tool to catch these errors.
It's a hard nut to crack because of things like AUTOLOAD, Autosplit, and run-time access to class symbol tables. We won't even get into the abomination that is multiple dispatch, because I'm still wrapping it around my brain.
I catch a lot more errors running unit tests on my code than I do running it through the compiler and looking for warnings. If you exercise your code paths sufficiently as bikeNomad suggests, you'd get closer to what you want than the compiler can provide.
It's not exactly what you want, but it's working pretty well for me.
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