Perl 5.22.0 should work much better in IRIX (1) and the upcoming Perl 5.22.1 should work even better. (1) Multiple problems had accumulated over the years, but most importantly the SGI compiler had (still has) an optimizer bug which produced broken code. Now (since 5.22.0) we have a workaround for that, and other issues. (2) In the IRIX I have access to (uname -a says: IRIX64 irix 6.5 07202013 IP35) as of "bleadperl" commit 6504068e (http://perl5.git.perl.org/perl.git) in fact all tests pass with the default config. The 5.22.1 for IRIX will be pretty much like that, 5.22.0 plus a couple of more fixes found since 5.22.0. Therefore I'm marking this ticket as resolved. --- via perlbug: queue: perl5 status: open https://rt.perl.org/Ticket/Display.html?id=116062