I've just started seeing this message when I run SpamAssassin version 3.3.2 with Perl version 5.18.2:
Use of each() on hash after insertion without resetting hash iterator results in undefined behavior, Perl interpreter: 0x9762008 at /usr/share/perl5/vendor_perl/Mail/SpamAssassin/AsyncLoop.pm line 363, <GEN18> line 144.: 3 Time(s) Spamassassin is started with the command: sudo spamassassin --lint I'm running Fedora 20 and think this surfaced with the last yum update. I know this is an oldish SA but thought I should mention it in case it can also affect 3.4.0 Martin