[libvirt] Track an error

[David kiarie]

Hi there,

Just a silly question, do we have a simpler way of checking where
exactly a test is failing.The tests are failing after hacking stuff
around.

I have this error

../build-aux/test-driver: line 95: 20128 Segmentation fault      "$@"
> $log_file 2>&1

Yes am having a segfault!

I don't know how to track it, well, I could review the whole file but
is there some other method I am missing.Could you help me interpret
the error, what  does 20128 stand for?