Kubuntu 14.04 , GTX 960
Broken: from 2.8 branch
Short description of error
Clément at IRC has recommended me to report this, because apparently it is related to depsgraph thing.
Exact steps for others to reproduce the error
Open scene, try to delete selected reflection plane, Blender crash.
Clarification: This scene comes from Classroom scene, I have simplified leaving in it only reflection plane.
I had placed reflection plane in Collection 2 and then I could not delete it anymore because of the crash.