Version 4.2.0-1 of sasview is marked for autoremoval from testing on Wed 21 Nov 2018. It depends (transitively) on scikit-learn, affected by #907806. You should try to prevent the removal by fixing these RC bugs.
Last update: 2018-11-19
A new upstream version is available: 5.0-beta.1high
A new upstream version 5.0-beta.1 is available, you should consider packaging it.