Blender 2.79a 8928d99270f
Adding a skin modifier to the stack, after a boolean modifier with Union and the BMesh solver, crashes blender. (if the solver is Carve, blender doesn't crash)
Have a cube, then have another cube. Unite these cubes with a boolean modifier (the operation has to be Union) the solver has to be BMesh then add a skin modifier to the stack; and then blender will crash.