yuqian90 opened a new pull request #14416:
URL: https://github.com/apache/airflow/pull/14416
This is to fix the following error that happens when a user clicks on 'Task
Instance Details' for a TaskInstance that has previous TaskInstance not yet run
(e.g. previous instance was marked success without running).
This bug was caused by #12910. It affects Airflow 2.0.0 and 2.0.1.
```python
...
File "/opt/airflow/airflow/utils/session.py", line 65, in wrapper
return func(*args, session=session, **kwargs)
File "/opt/airflow/airflow/models/taskinstance.py", line 826, in
get_previous_start_date
return prev_ti and pendulum.instance(prev_ti.start_date)
File "/usr/local/lib/python3.6/site-packages/pendulum/__init__.py", line
174, in instance
raise ValueError("instance() only accepts datetime objects.")
ValueError: instance() only accepts datetime objects.
```
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