Gabriele Monaco [off-list ref] writes:

RV selftest rely on bash errexit (set -e) to terminate with error, when
a step is expected to return false, the following syntax is used:

  ! cmd

This however prevents the test from exiting when cmd is false (desired)
but doesn't exit if cmd is true, since commands prefixed with ! are
explicitly excluded from errexit.

Use the syntax

  ! cmd || false

Which ends up checking the exit value of ! cmd and supplies a false
command for errexit to evaluate.

Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>

Sounds reasonable.

Acked-by: Nam Cao <redacted>