Data writer should be able to read but not able to

According to spec https://developer.couchbase.com/documentation/server/5.0/security/concepts-rba-for-apps.html#rbac_for_users_roles_and_privileges__table_data_writer_role

Data Writer should be able to read document and subdocument.

However I get

"Not authorized for operation"

for lcb_get3() and lcb_subdoc3()

Attaching cpp code and Makefile to reproduce.

Here is steps.

1. Create a cluster (single node would be fine) of 5.0.0-3490
2. Create bucket 'default'
3. Create user 'datawriter' with bucket write role to 'default' bucket. Password as 'password'
4. Checkout libcouchbase 2.8.0 in ../../couchbase/libcouchbase and install litbary under ../../couchbase/libcouchbase/inst
5. Build the example app 'cmake -DLCB_ROOT=../../couchbase/libcouchbase/inst -DCMAKE_BUILD_TYPE=DEBUG ./'
6. run app './sdk_lcb_feature_test'

Expected : No errors

Actual: "Not authorized for operation" for lcb_get3() and lcb_subdoc3() like this

key: SDLOOKUP...Not authorized for operation

key: GET...Not authorized for operation