Buildworld finishes despite swap exhaustion

Lately a Pi2B running buildworld reported an
exhaustion of swap, but buildworld kept running
and seemingly finished successfully.

The report came on the serial console, I didn't
find anything in the buildworld log. 

This seems a very great improvement. Swap exhaustion
differs from other sorts of failure, in that one can 
simply re-try the job with some hope of success when 
the workload is lighter.

Am I interpreting this correctly?

Thanks for reading,

bob prohaska