The nightly tests on excalibur seem to intermittently give bizarre results which may be as a result of running out of memory during the build/test process. We are also seeing several build failures that may be caused by same problem.
To eliminate this possibility we should increase the amount of memory available during build process. This is probably as simple as adding the following line to appropriate section in night-sanity.sh. However I will leave it to someone who has access to the system to fix.