Until the fallout from https://www.traviscistatus.com/incidents/2p40l49r3yxd
( https://github.com/travis-ci/travis-ci/issues/6439 ) is fixed...
# which ones of the above can fail
allow_failures:
+ # FIXME work around https://github.com/travis-ci/travis-ci/issues/6439
+ - perl: 5.18-extras
+ - perl: 5.24.0_thr_qm
+
# these run with various dev snapshots - allowed to fail
- perl: cperl-5.24.0_thr_qm
- perl: cperl-master_thr