Is this a new bug in dbt-core?

• I believe this is a new bug in dbt-core
• I have searched the existing issues, and I could not find an existing issue for this bug

Current Behavior

Running this model and using dbt_utils.date_spine used to work. I now get an error I can't get to the bottom of.

Expected Behavior

Should evaluate and give a table

Steps To Reproduce

With dbt on local machine:

1. Define model as per below

{{
    config(
        materialized = "view" if target.name not in ['prod'] else 'table'
    )
}}




WITH date_list AS
(
{{ dbt_utils.date_spine(
datepart="day",
start_date="TO_DATE('01/01/2008', 'dd/mm/yyyy')",
end_date="TO_DATE(CONCAT(YEAR(CURRENT_DATE) + 6,'-12-31'))"
)
}}

)

SELECT
*
FROM date_list;

2. Install the following packages

databricks-sdk = "==0.17.0"
dbt-databricks = "==1.6.8"

3. Run dbt build -f

Relevant log output

Snippet

01:09:20  Completed with 1 error and 0 warnings:
01:09:20  
01:09:20    Compilation Error in model dim_date (dbt_demo/models/XXX/datamarts/customer_service/dim_date.sql)
  int() argument must be a string, a bytes-like object or a real number, not 'NoneType'
  
  > in macro default__get_intervals_between (macros/sql/date_spine.sql)
  > called by macro get_intervals_between (macros/sql/date_spine.sql)
  > called by macro default__date_spine (macros/sql/date_spine.sql)
  > called by macro date_spine (macros/sql/date_spine.sql)
  > called by model dim_date (dbt_demo/models/adventureworks/datamarts/customer_service/dim_date.sql)

Environment

- OS: MacOS 14.3 (23D56) Sonoma
- Python: 3.10.2
- dbt: 1.6.10

Which database adapter are you using with dbt?

other (mention it in "Additional Context")

Additional Context

Using dbt-databricks==1.6.8

Last seen working on Jan 24th. Then another issue came up that I only just resolved, per issue (and hence why I fixed version of databricks-sdk). I haven't tested this functionality until yesterday, which is when I first noticed it was broken.