Problem:

An ASAN run of format-stress-test-disagg-follower-1 on amazon2023-arm64-asan (WiredTiger develop @ 0c974c8b) flagged memory errors in the disagg fast-truncate entry management. Investigation of txn_truncate.c revealed related bugs in that code path, covering:

• Memory lifecycle
• NULL safety
• Error propagation and handling

Context:
This ticket was previously created from a failed job which highlights some of the original memory errors.
format-stress-test-disagg-follower-1 failed on ! Amazon2023 ARM64 ASAN

Host: N/A
Project: WiredTiger (develop)
Commit: diff: wt15430-format | 01 Apr 26 07:49 UTC
Evergreen Subscription: ; Evergreen Event:

Task Logs (format-stress-test-disagg-follower-1)

Definition of Done:

• ASAN problems are resolved
• __wt_insert_truncate_entry closes the correct handle
• Appropriate null checks are added
• __wti_mark_committed_truncate_table   and _wti_layered_table_truncate_rollback do not hide errors
• __key_within_truncate_range should not return true if an error occurs
• __wt_layered_table_truncate_detect_write_conflict returns the correct error code