Are you using the same MXD when you do this.
Try it again on the same section of feature in a brand new MXD and use the same features to try and duplicate it.
If it does not crash you may have an issue with the MXD you are using.
If this is the case recreate your MXD by using the Select Elements tool in Layout View. Select all elements and COPY. in a new blank MXD layout view move the existing data frame out of the way. set your page size to what it was in the original mxd, if you had set up the layout for printing. Paste to copied elements. and save your mxd.