So I did something where I restored an older backed up loro doc - then tried to sync it with devices, it would keep crashing and have no idea how to debug this

[clearly-outsane]

loro-internal-1.10.8/src/dag/iter.rs:299
assertion failed: slice_end > slice_from

i made claude write a test for me so u can replicate it but git doesn't support .bin files so dunno how to share it here

[simonlpaige]

This assertion failure (slice_end > slice_from) within src/dag/iter.rs suggests that the underlying Dataflow Graph structure being iterated over has corrupted or inconsistent bounds metadata. Since this occurs after restoring an older backup, the root cause is likely a structural mismatch between the saved state and what Loro's current iteration logic expects.

Before attempting the full sync, it might be necessary to validate the integrity of the restored DAG itself. The assertion failure points directly to invalid slicing indices used during traversal.

Could you confirm if there are any checksums or metadata fields in your backup that track the expected size or node count? If not, consider implementing a pre-sync validation step that compares fundamental invariants between the source and destination:

1. Node Count: Do the total number of nodes/operations match expectations for version 1.10.8?
2. Dependency Cycles: Run a graph traversal check to ensure no dangling pointers or unreachable segments exist in