To help debug issues with the systemtap tests, it would be great to dump the qemu dmesg log when the test fails. This will help a lot as many of the issues are related to kernel upgrades or causes that would log a trace in dmesg. On the autobuilder when getting such a bug we have to fish out the log before it gets removed. See for example bug 14673
Moved en masse from 4.2 to 4.3 by Randy.
Fixed in 440a5f6ee682a9ab17a3da00178733b39749bdcf.