afee3924b3
despite that the API document at https://docs.aws.amazon.com/AmazonS3/latest/API/API_Tag.htm claims that both these tags are "Required" in the "Tag" object returned by S3 APIs, we still have to check them before dereferencing the pointer of the child node, as we should not trust the output of an external API. Signed-off-by: Kefu Chai <kefu.chai@scylladb.com> Closes scylladb/scylladb#20160