This was fixed by commit 0d40ea5e98ce5de7a1a2facb17e53e315155a577 Author: Karl Williamson <khw@cpan.org> Date: Sat Mar 23 21:29:51 2019 -0600 Remove zero length valgrind files at end. -- Karl Williamson --- via perlbug: queue: perl5 status: open https://rt.perl.org/Ticket/Display.html?id=131135