T7957: filter stderr when deleting container images

The call to rc_cmd('podman inspect ...') determines whether a container image
scheduled for deletion has any ancestor containers still using it. Previously,
if the podman command wrote output to stderr, rc_cmd() would return that error
message alongside or instead of the ancestor container ID.

This caused subsequent podman calls to fail, as the error string was incorrectly
treated as a valid command argument. This change ensures only valid ancestor
IDs are returned.

This is a fix for commit a99ca6d11b5 ("op-mode: T7403: add option for forcefully
remove a container image")

0 files changed, 0 insertions, 0 deletions