Adding various collision types to a single mesh will cause it to hard crash the editor. No Crash Reporter window will open.
Note that this happens with the user's mesh, but I was not able to reproduce with the use of one from the modes window.
Crash: 4.14.3 Binary CL-3249277
Crash: 4.15 Preview 1 Binary CL-3258144
Crash: 4.16 Dev-Main CL-3273602
Included the log, but it doesn't have any crash error messages.
1. Import attached Static Mesh with Default Settings
2. Open the mesh in the Static Mesh Editor.
3. Go to the Collision Menu and add the following: Sphere simplified collision, Capsule Simplified Collision, Box Simplified Collison, and then 10DOP-X
Results: The editor will hard crash without a Crash Reporter window.
Head over to the existing Questions & Answers thread and let us know what's up.