Description of problem: Requires: perl(:MODULE_COMPAT_5.16.2) Removing: 4:perl-5.16.3-265.fc19.i686 (@updates/19) perl(:MODULE_COMPAT_5.16.2) Updated By: 4:perl-5.18.1-288.fc20.i686 (fedora) ~perl(:MODULE_COMPAT_5.18.1) ~perl(:MODULE_COMPAT_5.18.0) Version-Release number of selected component (if applicable): perl-Language-Expr-0.19-4.fc19.noarch slic3r-0.9.10b-2.fc20.noarch How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
perl-Language-Expr is current incompatible with perl 5.18 in Fedora 20 (Bug #992666) so you'll have to remove it and anything that depends on it (e.g. slic3r) prior to attempting a yum upgrade from F19 to F20 (which is what it looks like you're trying to do).
*** This bug has been marked as a duplicate of bug 992666 ***