core/filtermaps: Could not get last block of epoch

[fjl]

This is just after merging #31080 and trying it out on a Sepolia node.
The indexer runs, and starts printing

ERROR[03-17|19:06:34.584] Could not get last block of epoch        epoch=65 error="failed to retrieve last block of map 67583: pebble: not found"
INFO [03-17|19:06:38.317] Successful NewPayload                    number=7,922,601 hash=ee0d98..55dcd6 status=SYNCING
INFO [03-17|19:06:38.317] Forkchoice requested sync to new head    number=7,922,601 hash=ee0d98..55dcd6 finalized=unknown
INFO [03-17|19:06:38.317] Successful ForkchoiceUpdated             head=ee0d98..55dcd6 status=SYNCING
INFO [03-17|19:06:41.046] Looking for peers                        peercount=0 tried=40 static=0
ERROR[03-17|19:06:41.301] Could not get last block of epoch        epoch=65 error="failed to retrieve last block of map 67583: pebble: not found"
ERROR[03-17|19:06:46.765] Could not get last block of epoch        epoch=65 error="failed to retrieve last block of map 67583: pebble: not found"

It never gets beyond this and just keeps printing the same message.

[fjl]

Update: the indexer appears to do something anyway, on shutdown it printed:

INFO [03-17|19:09:27.335] Log index head rendering finished        "first block"=7,828,861 "last block"=7,872,039 processed=2149 elapsed=3m26.521s

Maybe it's only the tail rendering that has the problem.