`make world` exit code

Hackers,

I'm building a new server using 9.1beta2. My build script includes these two line:

make world -j3 || exit $?
make install-world || exit $?

Much to my annoyance, `make world` seems to succeed, but the script exits with no error message. So the second line never executes. I commented out the " || exit $?" part and the script worked fine. Is there some random non-success error value coming from a successful run of `make world` in the beta 2 release?

I'm on:

Linux version 2.6.39.1-x86_64-linode19 (root@build.linode.com) (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #1 SMP Tue Jun 21 10:04:20 EDT 2011

Thanks,

David