Created attachment 300259 [details] /var/log/paludis/1327845974-install-net-print_cups-1.5.0-r3:0::gentoo.out I was doing an -e world rebuild of ~900 packages, this was the only consistent failure
Created attachment 300261 [details] output of cave info net-print/cups
*** Bug 401553 has been marked as a duplicate of this bug. ***
I had exactly the same problem. Enabling the "thread" USE flag for cups helped in my case.
Reproduced here...
(In reply to comment #4) > Reproduced here... ... and still present in cups-1.5.2 (soon)
Created attachment 302477 [details] build log
The same problem here with net-print/cups-1.5.2-r1[-threads].
Fixed by backport in 1.5.2-r3