Comment 21 for bug 1108719

Test version: cups -- 1.5.3-0ubuntu8

1. install all updates

2. reproduce bug
sudo /usr/lib/cups/backend/usb
--> crashes as expected

3. install updated CUPS version

4. check version
~$ dpkg -l | grep 'cups'
ii bluez-cups 4.98-2ubuntu7
ii cups 1.5.3-0ubuntu8
ii cups-bsd 1.5.3-0ubuntu8
ii cups-client 1.5.3-0ubuntu8
ii cups-common 1.5.3-0ubuntu8
ii cups-dbg 1.5.3-0ubuntu8
ii cups-filters 1.0.18-0ubuntu0.1
ii cups-ppdc 1.5.3-0ubuntu8
ii ghostscript-cups 9.05~dfsg-0ubuntu4.2
ii libcups2 1.5.3-0ubuntu6
ii libcupscgi1 1.5.3-0ubuntu6
ii libcupsdriver1 1.5.3-0ubuntu6
ii libcupsfilters1 1.0.18-0ubuntu0.1
ii libcupsimage2 1.5.3-0ubuntu6
ii libcupsmime1 1.5.3-0ubuntu6
ii libcupsppdc1 1.5.3-0ubuntu6
ii python-cups 1.9.61-0ubuntu2
ii python-cupshelpers 1.3.8+20120201-0ubuntu8.1

5. reproduce bug
~$ ulimit -c unlimited
~$ sudo /usr/lib/cups/backend/usb
DEBUG: list_devices
WARNING: Unable to initialize USB access via libusb, libusb error -99

--> no crash
--> setting to 'verification-done'