We currently don't have any debugger tests that explicitly exercises lambdas. I have created two tests that at least provide some kind of red-face testing. They aren't very comprehensive, but I still think they add value.
webrev: http://cr.openjdk.java.net/~sla/8027371/webrev.00/ bug: https://bugs.openjdk.java.net/browse/JDK-8027371 Thanks, /Staffan