erasure: Set fi.IsLatest when adding a new version (#13277)

cmd/erasure-multipart.go

@@ -950,6 +950,9 @@ func (er erasureObjects) CompleteMultipartUpload(ctx context.Context, bucket str
 		}
 	}
 
+	// we are adding a new version to this object under the namespace lock, so this is the latest version.
+	fi.IsLatest = true
+
 	// Success, return object info.
 	return fi.ToObjectInfo(bucket, object), nil
 }

cmd/erasure-object.go

@@ -134,6 +134,8 @@ func (er erasureObjects) CopyObject(ctx context.Context, srcBucket, srcObject, d
 		return oi, toObjectErr(err, srcBucket, srcObject)
 	}
 
+	// we are adding a new version to this object under the namespace lock, so this is the latest version.
+	fi.IsLatest = true
 	return fi.ToObjectInfo(srcBucket, srcObject), nil
 }
 
@@ -1001,6 +1003,9 @@ func (er erasureObjects) putObject(ctx context.Context, bucket string, object st
 	fi.ReplicationState = opts.PutReplicationState()
 	online = countOnlineDisks(onlineDisks)
 
+	// we are adding a new version to this object under the namespace lock, so this is the latest version.
+	fi.IsLatest = true
+
 	return fi.ToObjectInfo(bucket, object), nil
 }