Comment 2 for bug 585027

Yes, as stated in my original comment, it is reproducible (myself and Dustin Kirkland), with variants of "while true; do sudo multipath -F; sudo multipath -v4 ; done".

All that is required is a device that multipath will create a /dev/mapper entry for (use_friendly_names or not) and remove with -F (as exampled in my original comment, a bog standard Hard Disk drive will be fit for the purpose.