SpringSource/spring-framework — pull request #99 by dsyer (2012-06-21 09:29:50+00:00)
Title: SPR-4675: add explicit test for null return from aop advice

When around advice returns null and the caller is expecting a
primitive it is *really* hard to debug. Adding an explicit
check for this in the aop proxy and throwing a Spring exception
seems like the best solution.