is this a bashism?

["Marcelo E. Magallon" <mmagallo@efis.ucr.ac.cr>]

#!/bin/sh -e

[ -x /usr/bin/update-menus ] && update-menus

 I've got a bug report that says it is. Ash bails out with exit status
 1 if update-menus doesn't exist. 

                                                        Marcelo