As a heads up to all softraid(4) users, there's a known issue with a softraid patch included in the Jun 5 snapshot kernels. In particular, unsuccessful attempts to create a softraid logical disk using bioctl(8) (i.e., "bioctl -c") can result in a kernel panic.
I encourage softraid(4) users to skip this snapshot release. The next snapshot release will include a fix for this issue. Sorry for the inconvenience! :(