After upgrading to perl-5.18 my logs are filled with: _WARN: Use of each() on hash after insertion without resetting hash iterator results in undefined behavior, Perl interpreter: 0x1cee010 at /usr/lib64/perl5/vendor_perl/5.18.2/Mail/SpamAssassin/AsyncLoop.pm line 363. The URL in the description is the upstream bug for this. Initial testing of the patch looks good. Patch is at: https://issues.apache.org/SpamAssassin/attachment.cgi?id=5143
*** This bug has been marked as a duplicate of bug 519186 ***