Blender 2.79a 8928d99270f
Adding the skin modifier to the stack, after 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 the boolean modifier (the operation has to be Union) the solver has to be BMesh then add the skin modifier to the stack; and then blender will crash.