feature request: warning about coldline retrieval costs

I hope this is the correct place to file this feature/enhancement request.

I would like to suggest that gsutil generate a warning if a bucket is of type "NEARLINE" but the object in that bucket is of type "COLDLINE". As operating on a bucket that you believe contains nearline objects but instead contains coldline objects can result in large unexpected bills for a naive operator such as myself. I managed to spend $6k+ with one 'gsutil rsync' command.

For example:

$ gsutil ls -L -b gs://name-redacted
gs://name-redacted/ :
**Storage class: NEARLINE**
Location constraint: US
Versioning enabled: None
Logging configuration: None
Website configuration: None
CORS configuration: None
**Lifecycle configuration: Present**
Requester Pays enabled: None
Labels: None
Default KMS key: None
Time created: Thu, 26 May 2016 22:51:58 GMT
Time updated: Mon, 04 Jun 2018 21:31:03 GMT
Metageneration: 14
...

$ gsutil lifecycle get gs://name-redacted
{"rule": [{"action": {"storageClass": "COLDLINE", "type": "SetStorageClass"}, "condition": {"matchesStorageClass": ["NEARLINE"]}}]}

Examining objects in the bucket shows they are coldline:

$ gsutil ls -L gs://name-redacted/logs/2016-05-29-13-34-45-etc
gs://name-redacted/logs/2016-05-29-13-34-45-etc:
Creation time: Tue, 31 May 2016 19:24:42 GMT
Update time: Sat, 28 Oct 2017 09:07:40 GMT
Storage class update time:Sat, 28 Oct 2017 09:07:40 GMT
Storage class: COLDLINE
...

I now double-checked and I do see that if you drill down in the bucket to look at the objects, the do show class "nearline".

Just hoping this doesn't bite other people.