[Bug] Debug logs for batches are printing out reference to function instead of description details

[QMalcolm]

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

Debug logging around how microbatch batches are being run currently log the pointer to the describe_batch method instead of the result of the method. Looks something like

11:01:11.306014 [debug] [MainThread]: <bound method MicrobatchModelRunner.describe_batch of <dbt.task.run.MicrobatchModelRunner object at 0x105e93e20>> is being run sequentially

Expected Behavior

Debug logging around how microbatch batches are being run should log information about the batch, e.g.

11:01:11.306014 [debug] [MainThread]: batch 2024-12-08 of microbatch_demo.microbatch_model is being run sequentially

Steps To Reproduce

1. Ensure you're running on dbt-core 1.9.0rc2 via pip install dbt-core==1.9.0rc2
2. Create a dbt project with an microbatch incremental model
3. Run the project via dbt run
4. grep the logs cat logs/dbt.log | grep "is being run"
5. Observe the log weirdness

Relevant log output

(venv) quigleymalcolm@Quigley-Malcolm microbatch_demo % dbt run
17:01:08  Running with dbt=1.9.0-rc2
17:01:10  Registered adapter: postgres=1.9.0-b1
17:01:10  Unable to do partial parsing because of a version mismatch
17:01:10  Found 3 models, 429 macros
17:01:10  
17:01:10  Concurrency: 1 threads (target='dev')
17:01:10  
17:01:11  1 of 3 START sql table model microbatch_demo.input_model ....................... [RUN]
17:01:11  1 of 3 OK created sql table model microbatch_demo.input_model .................. [SELECT 4 in 0.10s]
17:01:11  2 of 3 START sql microbatch model microbatch_demo.microbatch_model ............. [RUN]
17:01:11  1 of 4 START batch 2024-12-06 of microbatch_demo.microbatch_model .............. [RUN]
17:01:11  1 of 4 OK created batch 2024-12-06 of microbatch_demo.microbatch_model ......... [MERGE 0 in 0.10s]
17:01:11  2 of 4 START batch 2024-12-07 of microbatch_demo.microbatch_model .............. [RUN]
17:01:11  2 of 4 OK created batch 2024-12-07 of microbatch_demo.microbatch_model ......... [MERGE 0 in 0.04s]
17:01:11  3 of 4 START batch 2024-12-08 of microbatch_demo.microbatch_model .............. [RUN]
17:01:11  3 of 4 OK created batch 2024-12-08 of microbatch_demo.microbatch_model ......... [MERGE 0 in 0.04s]
17:01:11  4 of 4 START batch 2024-12-09 of microbatch_demo.microbatch_model .............. [RUN]
17:01:11  4 of 4 OK created batch 2024-12-09 of microbatch_demo.microbatch_model ......... [MERGE 0 in 0.03s]
17:01:11  2 of 3 OK created sql microbatch model microbatch_demo.microbatch_model ........ [SUCCESS in 0.21s]
17:01:11  3 of 3 START sql view model microbatch_demo.dependent_model .................... [RUN]
17:01:11  3 of 3 OK created sql view model microbatch_demo.dependent_model ............... [CREATE VIEW in 0.07s]
17:01:11  
17:01:11  Finished running 1 incremental model, 1 table model, 1 view model in 0 hours 0 minutes and 0.66 seconds (0.66s).
17:01:11  
17:01:11  Completed successfully
17:01:11  
17:01:11  Done. PASS=3 WARN=0 ERROR=0 SKIP=0 TOTAL=3
(venv) quigleymalcolm@Quigley-Malcolm microbatch_demo % cat logs/dbt.log | grep "is being run"
11:01:11.306014 [debug] [MainThread]: <bound method MicrobatchModelRunner.describe_batch of <dbt.task.run.MicrobatchModelRunner object at 0x105e93e20>> is being run sequentially
11:01:11.408218 [debug] [MainThread]: <bound method MicrobatchModelRunner.describe_batch of <dbt.task.run.MicrobatchModelRunner object at 0x105e96f80>> is being run sequentially
11:01:11.446819 [debug] [MainThread]: <bound method MicrobatchModelRunner.describe_batch of <dbt.task.run.MicrobatchModelRunner object at 0x104bae470>> is being run sequentially
11:01:11.485696 [debug] [MainThread]: <bound method MicrobatchModelRunner.describe_batch of <dbt.task.run.MicrobatchModelRunner object at 0x105fc28f0>> is being run sequentially

Environment

- OS: macOS 15.1
- Python: 3.10.15
- dbt: 1.9.0rc2

Which database adapter are you using with dbt?

postgres

Additional Context

[QMalcolm]

I should have waited two extra minutes so that this issue could have been created at 11:11AM CST 🫠