address incremental-serializer fuzzer failures #537
Merged
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There's a performance problem in
insert_sentinel()
if it's passed a tree that is large because it reuses sub-trees. This case can cause the iteration to pick every tree node to run for a very long time. This change makesinsert_sentinel()
only consider nodes once, and skips them the second time they're encountered.Without this change the fuzzer can time out.