When the oldest_timestamp is held back, and stable_timestamp moves forward after the new snapshot is taken for updates, the page eviction would abort during WT_SESSION.verify. This issue became more visible after
SERVER-31767. It's only specific to MongoDB DEBUG builds (and corresponding WiredTiger diagnostic builds).
It would be helpful to add a Python test to cover this scenario:
- hold back oldest_timestamp
- insert data
- create a checkpoint
- run verify.