For this specific issue, you should *also* look at if your perl is threaded. See how the flags changed over time:

perl5.x.x = untreaded, tperl5.x.x = threaded

==  perl5.18.0    NOK, READONLY, pNOK
== tperl5.18.0    NOK, PADTMP, READONLY, pNOK

==  perl5.20.0    NOK, READONLY, pNOK
== tperl5.20.0    NOK, READONLY, pNOK

[download]

The change was shipped with version 5.19.3

Running perl-all -MData::Peek -wlemy%h=DDump 2.7;print join", ",sort k
+eys%{$h{FLAGS}}

perl5.x.x = untreaded, tperl5.x.x = threaded

==  perl5.8.1     NOK, READONLY, pNOK
== tperl5.8.1     NOK, PADBUSY, PADTMP, READONLY, pNOK
==  perl5.8.2     NOK, READONLY, pNOK
== tperl5.8.2     NOK, PADBUSY, PADTMP, READONLY, pNOK
==  perl5.8.3     NOK, READONLY, pNOK
== tperl5.8.3     NOK, PADBUSY, PADTMP, READONLY, pNOK
==  perl5.8.4     NOK, READONLY, pNOK
== tperl5.8.4     NOK, PADBUSY, PADTMP, READONLY, pNOK
==  perl5.8.5     NOK, READONLY, pNOK
== tperl5.8.5     NOK, PADBUSY, PADTMP, READONLY, pNOK
==  perl5.8.6     NOK, READONLY, pNOK
== tperl5.8.6     NOK, PADBUSY, PADTMP, READONLY, pNOK
==  perl5.8.7     NOK, READONLY, pNOK
== tperl5.8.7     NOK, PADBUSY, PADTMP, READONLY, pNOK
==  perl5.8.8     NOK, READONLY, pNOK
== tperl5.8.8     NOK, PADBUSY, PADTMP, READONLY, pNOK
==  perl5.8.9     NOK, READONLY, pNOK
== tperl5.8.9     NOK, PADBUSY, PADTMP, READONLY, pNOK
==  perl5.10.0    NOK, READONLY, pNOK
== tperl5.10.0    NOK, PADTMP, READONLY, pNOK
==  perl5.10.1    NOK, READONLY, pNOK
== tperl5.10.1    NOK, PADTMP, READONLY, pNOK
==  perl5.11.0    NOK, READONLY, pNOK
== tperl5.11.0    NOK, PADTMP, READONLY, pNOK
==  perl5.11.1    NOK, READONLY, pNOK
== tperl5.11.1    NOK, PADTMP, READONLY, pNOK
==  perl5.11.2    NOK, READONLY, pNOK
== tperl5.11.2    NOK, PADTMP, READONLY, pNOK
==  perl5.11.3    NOK, READONLY, pNOK
== tperl5.11.3    NOK, PADTMP, READONLY, pNOK
==  perl5.11.4    NOK, READONLY, pNOK
== tperl5.11.4    NOK, PADTMP, READONLY, pNOK
==  perl5.11.5    NOK, READONLY, pNOK
== tperl5.11.5    NOK, PADTMP, READONLY, pNOK
==  perl5.12.0    NOK, READONLY, pNOK
== tperl5.12.0    NOK, PADTMP, READONLY, pNOK
==  perl5.12.1    NOK, READONLY, pNOK
== tperl5.12.1    NOK, PADTMP, READONLY, pNOK
==  perl5.12.2    NOK, READONLY, pNOK
== tperl5.12.2    NOK, PADTMP, READONLY, pNOK
==  perl5.12.3    NOK, READONLY, pNOK
== tperl5.12.3    NOK, PADTMP, READONLY, pNOK
==  perl5.12.4    NOK, READONLY, pNOK
== tperl5.12.4    NOK, PADTMP, READONLY, pNOK
==  perl5.12.5    NOK, READONLY, pNOK
== tperl5.12.5    NOK, PADTMP, READONLY, pNOK
==  perl5.13.0    NOK, READONLY, pNOK
== tperl5.13.0    NOK, PADTMP, READONLY, pNOK
==  perl5.13.1    NOK, READONLY, pNOK
== tperl5.13.1    NOK, PADTMP, READONLY, pNOK
==  perl5.13.2    NOK, READONLY, pNOK
== tperl5.13.2    NOK, PADTMP, READONLY, pNOK
==  perl5.13.3    NOK, READONLY, pNOK
== tperl5.13.3    NOK, PADTMP, READONLY, pNOK
==  perl5.13.4    NOK, READONLY, pNOK
== tperl5.13.4    NOK, PADTMP, READONLY, pNOK
==  perl5.13.5    NOK, READONLY, pNOK
== tperl5.13.5    NOK, PADTMP, READONLY, pNOK
==  perl5.13.6    NOK, READONLY, pNOK
== tperl5.13.6    NOK, PADTMP, READONLY, pNOK
==  perl5.13.7    NOK, READONLY, pNOK
== tperl5.13.7    NOK, PADTMP, READONLY, pNOK
==  perl5.13.8    NOK, READONLY, pNOK
== tperl5.13.8    NOK, PADTMP, READONLY, pNOK
==  perl5.13.9    NOK, READONLY, pNOK
== tperl5.13.9    NOK, PADTMP, READONLY, pNOK
==  perl5.13.10   NOK, READONLY, pNOK
== tperl5.13.10   NOK, PADTMP, READONLY, pNOK
==  perl5.13.11   NOK, READONLY, pNOK
== tperl5.13.11   NOK, PADTMP, READONLY, pNOK
==  perl5.14.0    NOK, READONLY, pNOK
== tperl5.14.0    NOK, PADTMP, READONLY, pNOK
==  perl5.14.1    NOK, READONLY, pNOK
== tperl5.14.1    NOK, PADTMP, READONLY, pNOK
==  perl5.14.2    NOK, READONLY, pNOK
== tperl5.14.2    NOK, PADTMP, READONLY, pNOK
==  perl5.14.3    NOK, READONLY, pNOK
== tperl5.14.3    NOK, PADTMP, READONLY, pNOK
==  perl5.14.4    NOK, READONLY, pNOK
== tperl5.14.4    NOK, PADTMP, READONLY, pNOK
==  perl5.15.0    NOK, READONLY, pNOK
== tperl5.15.0    NOK, PADTMP, READONLY, pNOK
==  perl5.15.1    NOK, READONLY, pNOK
== tperl5.15.1    NOK, PADTMP, READONLY, pNOK
==  perl5.15.2    NOK, READONLY, pNOK
== tperl5.15.2    NOK, PADTMP, READONLY, pNOK
==  perl5.15.3    NOK, READONLY, pNOK
== tperl5.15.3    NOK, PADTMP, READONLY, pNOK
==  perl5.15.4    NOK, READONLY, pNOK
== tperl5.15.4    NOK, PADTMP, READONLY, pNOK
==  perl5.15.5    NOK, READONLY, pNOK
== tperl5.15.5    NOK, PADTMP, READONLY, pNOK
==  perl5.15.6    NOK, READONLY, pNOK
== tperl5.15.6    NOK, PADTMP, READONLY, pNOK
==  perl5.15.7    NOK, READONLY, pNOK
== tperl5.15.7    NOK, PADTMP, READONLY, pNOK
==  perl5.15.8    NOK, READONLY, pNOK
== tperl5.15.8    NOK, PADTMP, READONLY, pNOK
==  perl5.15.9    NOK, READONLY, pNOK
== tperl5.15.9    NOK, PADTMP, READONLY, pNOK
==  perl5.16.0    NOK, READONLY, pNOK
== tperl5.16.0    NOK, PADTMP, READONLY, pNOK
==  perl5.16.1    NOK, READONLY, pNOK
== tperl5.16.1    NOK, PADTMP, READONLY, pNOK
==  perl5.16.2    NOK, READONLY, pNOK
== tperl5.16.2    NOK, PADTMP, READONLY, pNOK
==  perl5.16.3    NOK, READONLY, pNOK
== tperl5.16.3    NOK, PADTMP, READONLY, pNOK
==  perl5.17.0    NOK, READONLY, pNOK
== tperl5.17.0    NOK, PADTMP, READONLY, pNOK
==  perl5.17.1    NOK, READONLY, pNOK
== tperl5.17.1    NOK, PADTMP, READONLY, pNOK
==  perl5.17.2    NOK, READONLY, pNOK
== tperl5.17.2    NOK, PADTMP, READONLY, pNOK
==  perl5.17.3    NOK, READONLY, pNOK
== tperl5.17.3    NOK, PADTMP, READONLY, pNOK
==  perl5.17.4    NOK, READONLY, pNOK
== tperl5.17.4    NOK, PADTMP, READONLY, pNOK
==  perl5.17.5    NOK, READONLY, pNOK
== tperl5.17.5    NOK, PADTMP, READONLY, pNOK
==  perl5.17.6    NOK, READONLY, pNOK
== tperl5.17.6    NOK, PADTMP, READONLY, pNOK
==  perl5.17.7    NOK, READONLY, pNOK
== tperl5.17.7    NOK, PADTMP, READONLY, pNOK
==  perl5.17.8    NOK, READONLY, pNOK
== tperl5.17.8    NOK, PADTMP, READONLY, pNOK
==  perl5.17.9    NOK, READONLY, pNOK
== tperl5.17.9    NOK, PADTMP, READONLY, pNOK
==  perl5.17.10   NOK, READONLY, pNOK
== tperl5.17.10   NOK, PADTMP, READONLY, pNOK
==  perl5.17.11   NOK, READONLY, pNOK
== tperl5.17.11   NOK, PADTMP, READONLY, pNOK
==  perl5.18.0    NOK, READONLY, pNOK
== tperl5.18.0    NOK, PADTMP, READONLY, pNOK
==  perl5.18.1    NOK, READONLY, pNOK
== tperl5.18.1    NOK, PADTMP, READONLY, pNOK
==  perl5.18.2    NOK, READONLY, pNOK
== tperl5.18.2    NOK, PADTMP, READONLY, pNOK
==  perl5.18.3    NOK, READONLY, pNOK
== tperl5.18.3    NOK, PADTMP, READONLY, pNOK
==  perl5.18.4    NOK, READONLY, pNOK
== tperl5.18.4    NOK, PADTMP, READONLY, pNOK
==  perl5.19.0    NOK, READONLY, pNOK
== tperl5.19.0    NOK, PADTMP, READONLY, pNOK
==  perl5.19.1    NOK, READONLY, pNOK
== tperl5.19.1    NOK, PADTMP, READONLY, pNOK
==  perl5.19.2    NOK, READONLY, pNOK
== tperl5.19.2    NOK, PADTMP, READONLY, pNOK
==  perl5.19.3    NOK, READONLY, pNOK
== tperl5.19.3    NOK, READONLY, pNOK
==  perl5.19.4    NOK, READONLY, pNOK
== tperl5.19.4    NOK, READONLY, pNOK
==  perl5.19.5    NOK, READONLY, pNOK
== tperl5.19.5    NOK, READONLY, pNOK
==  perl5.19.6    NOK, READONLY, pNOK
== tperl5.19.6    NOK, READONLY, pNOK
==  perl5.19.7    NOK, READONLY, pNOK
== tperl5.19.7    NOK, READONLY, pNOK
==  perl5.19.8    NOK, READONLY, pNOK
== tperl5.19.8    NOK, READONLY, pNOK
==  perl5.19.9    NOK, READONLY, pNOK
== tperl5.19.9    NOK, READONLY, pNOK
==  perl5.19.10   NOK, READONLY, pNOK
== tperl5.19.10   NOK, READONLY, pNOK
==  perl5.19.11   NOK, READONLY, pNOK
== tperl5.19.11   NOK, READONLY, pNOK
==  perl5.20.0    NOK, READONLY, pNOK
== tperl5.20.0    NOK, READONLY, pNOK
==  perl5.20.1    NOK, READONLY, pNOK
== tperl5.20.1    NOK, READONLY, pNOK
==  perl5.20.2    NOK, READONLY, pNOK
== tperl5.20.2    NOK, READONLY, pNOK
==  perl5.20.3    NOK, READONLY, pNOK
== tperl5.20.3    NOK, READONLY, pNOK
==  perl5.21.0    NOK, READONLY, pNOK
== tperl5.21.0    NOK, READONLY, pNOK
==  perl5.21.1    NOK, READONLY, pNOK
== tperl5.21.1    NOK, READONLY, pNOK
==  perl5.21.2    NOK, READONLY, pNOK
== tperl5.21.2    NOK, READONLY, pNOK
==  perl5.21.3    NOK, READONLY, pNOK
== tperl5.21.3    NOK, READONLY, pNOK
==  perl5.21.4    NOK, READONLY, pNOK
== tperl5.21.4    NOK, READONLY, pNOK
==  perl5.21.5    NOK, PROTECT, READONLY, pNOK
== tperl5.21.5    NOK, PROTECT, READONLY, pNOK
==  perl5.21.6    NOK, PROTECT, READONLY, pNOK
== tperl5.21.6    NOK, PROTECT, READONLY, pNOK
==  perl5.21.7    NOK, PROTECT, READONLY, pNOK
== tperl5.21.7    NOK, PROTECT, READONLY, pNOK
==  perl5.21.8    NOK, PROTECT, READONLY, pNOK
== tperl5.21.8    NOK, PROTECT, READONLY, pNOK
==  perl5.21.9    NOK, PROTECT, READONLY, pNOK
== tperl5.21.9    NOK, PROTECT, READONLY, pNOK
==  perl5.21.10   NOK, PROTECT, READONLY, pNOK
== tperl5.21.10   NOK, PROTECT, READONLY, pNOK
==  perl5.21.11   NOK, PROTECT, READONLY, pNOK
== tperl5.21.11   NOK, PROTECT, READONLY, pNOK
==  perl5.22.0    NOK, PROTECT, READONLY, pNOK
== tperl5.22.0    NOK, PROTECT, READONLY, pNOK
==  perl5.22.1    NOK, PROTECT, READONLY, pNOK
== tperl5.22.1    NOK, PROTECT, READONLY, pNOK
==  perl5.22.2    NOK, PROTECT, READONLY, pNOK
== tperl5.22.2    NOK, PROTECT, READONLY, pNOK
==  perl5.22.3    NOK, PROTECT, READONLY, pNOK
== tperl5.22.3    NOK, PROTECT, READONLY, pNOK
==  perl5.23.0    NOK, PROTECT, READONLY, pNOK
== tperl5.23.0    NOK, PROTECT, READONLY, pNOK
==  perl5.23.1    NOK, PROTECT, READONLY, pNOK
== tperl5.23.1    NOK, PROTECT, READONLY, pNOK
==  perl5.23.2    NOK, PROTECT, READONLY, pNOK
== tperl5.23.2    NOK, PROTECT, READONLY, pNOK
==  perl5.23.3    NOK, PROTECT, READONLY, pNOK
== tperl5.23.3    NOK, PROTECT, READONLY, pNOK
==  perl5.23.4    NOK, PROTECT, READONLY, pNOK
== tperl5.23.4    NOK, PROTECT, READONLY, pNOK
==  perl5.23.5    NOK, PROTECT, READONLY, pNOK
== tperl5.23.5    NOK, PROTECT, READONLY, pNOK
==  perl5.23.6    NOK, PROTECT, READONLY, pNOK
== tperl5.23.6    NOK, PROTECT, READONLY, pNOK
==  perl5.23.7    NOK, PROTECT, READONLY, pNOK
== tperl5.23.7    NOK, PROTECT, READONLY, pNOK
==  perl5.23.8    NOK, PROTECT, READONLY, pNOK
== tperl5.23.8    NOK, PROTECT, READONLY, pNOK
==  perl5.23.9    NOK, PROTECT, READONLY, pNOK
== tperl5.23.9    NOK, PROTECT, READONLY, pNOK
==  perl5.24.0    NOK, PROTECT, READONLY, pNOK
== tperl5.24.0    NOK, PROTECT, READONLY, pNOK
==  perl5.24.1    NOK, PROTECT, READONLY, pNOK
== tperl5.24.1    NOK, PROTECT, READONLY, pNOK
==  perl5.25.0    NOK, PROTECT, READONLY, pNOK
== tperl5.25.0    NOK, PROTECT, READONLY, pNOK
==  perl5.25.1    NOK, PROTECT, READONLY, pNOK
== tperl5.25.1    NOK, PROTECT, READONLY, pNOK
==  perl5.25.2    NOK, PROTECT, READONLY, pNOK
== tperl5.25.2    NOK, PROTECT, READONLY, pNOK
==  perl5.25.3    NOK, PROTECT, READONLY, pNOK
== tperl5.25.3    NOK, PROTECT, READONLY, pNOK
==  perl5.25.4    NOK, PROTECT, READONLY, pNOK
== tperl5.25.4    NOK, PROTECT, READONLY, pNOK
==  perl5.25.5    NOK, PROTECT, READONLY, pNOK
== tperl5.25.5    NOK, PROTECT, READONLY, pNOK
==  perl5.25.6    NOK, PROTECT, READONLY, pNOK
== tperl5.25.6    NOK, PROTECT, READONLY, pNOK

[download]

Enjoy, Have FUN! H.Merijn

In reply to Re: Determining if a change in perl was backported by Tux
in thread Determining if a change in perl was backported by syphilis

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