Fixed by commit 2aa61ac397079a33eb3c36c2e7c1f41be224c657 Author: Karl Williamson <khw@cpan.org> Date: Thu Aug 4 14:07:53 2016 -0600 PATCH: [perl #128738] Large code pt as string delim The bug here is simply an I32 was used when an IV was needed. One could argue that the parser should refuse to accept something larger than an IV. I chose not to do that, as this is a deprecated usage, which generates a warning by default and will be a syntax error anyway in a future release. -- Karl Williamson --- via perlbug: queue: perl5 status: open https://rt.perl.org/Ticket/Display.html?id=128738