Some people on IRC have noted that Devel-NYTProf fails its tests on blead, and have identified 0740a29d60ebd4ff72090340b0140ec2210e90c7 "stop using &PL_sv_yes as no-op method" as the offending commit. Devel-NYTProf has at least some explicit knowledge of the behaviour of &PL_sv_yes as a callable, so this looks like an internals-heavy module being broken by the intentional change in undocumented behaviour. It's not a reason to revert the core change; I've opened [rt.cpan.org #123846] regarding the need for Devel-NYTProf to update. -zeframThread Next