Juergen Hoeller opened SPR-11699 and commented
As of Spring Framework 4.1, we should compile our tests with 1.8 source and target level by default, with spring-oxm as the only exception (because of JiBX). This goes along nicely with the AspectJ 1.8 upgrade (#15837), and even requires it to some degree (target 1.8 for the spring-aspects module only works with AspectJ 1.8.0.RC3 or later).
Issue Links:
Referenced from: commits 95b1cb7, 7bc2168