I should've read perlsub first. Thanks, haukex. I'd guess the reason for requiring this is to make it less likely to accidentally override builtins (e.g. think of an old Perl program declaring its own "say" subroutine).

In reply to Re^2: Overriding built-in function works only via import()? by perlancar
in thread Overriding built-in function works only via import()? by perlancar

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