There can be a race between getting the container ids for matches and getting the actual container. This makes sure that we check that the container returned by `Get` is non-nil before adding it to the list of matches. Fixes #25991 Signed-off-by: Michael Crosby <crosbymichael@gmail.com> Upstream-commit: a020ec4c8b476a814eb137e216fe9d723524fc3b Component: engine