[Bug]: dbt_artifacts.upload_results on on-run-end causing dbt docs generate step error: 'MacroGenerator' object is not iterable

[wusanny]

Overview

Our customer has an on-run-end in their dbt_project.yml as follows:

on-run-end:
  - "{% if target.name == 'prod' or target.name == 'test' %}{{ dbt_artifacts.upload_results(results) }}{% endif %}"

In their dbt runs, they are getting the following error:

Compilation Error in operation snowflake_edw-on-run-end-0 (./dbt_project.yml)

    'MacroGenerator' object is not iterable

    > in macro upload_results (macros/upload_results/upload_results.sql)
    > called by operation snowflake_edw-on-run-end-0 (./dbt_project.yml)

The issue only started since 16 Sep onwards, prior to this date - the same setup worked as per normal.

How to reproduce

Unfortunately, we have not been able to reproduce this outside of the customer's account/environment.

Expected behaviour

There should not have been any error raised.

Screenshots

Environment

Results of running dbt --version:

1.7.18

Please paste the contents of your packages.yml file here:

packages:
  - package: dbt-labs/dbt_external_tables
    version: 0.8.1
  - package: dbt-labs/dbt_utils
    version: 1.0.0
  - package: Montreal-Analytics/snowflake_utils
    version: 0.5.0
  - package: fivetran/fivetran_log
    version: [">=1.0.0", "<1.1.0"]
  - package: brooklyn-data/dbt_artifacts
    version: 2.6.3