filedescriptor out of range in select()

While attempting to create a new jail using a release that had not yet been fetched, during the fetch portion of the operation the GUI generated a stack trace with the error message "filedescriptor out of range in select()". I have attached a screenshot.

Also, immediately after this occurred, I clicked on the "Plugins" tab in order to click off the "Jails" tab (since the tabs don't have a refresh button) so that I could click back on the "Jails" tab to refresh the list. When clicking on the "Plugins" tab, the same stack trace and error appeared once again.