Fulcrum-1.9.7-x86_64-linux - crashing on Block 832871 on faulty transaction

[m4v1-21]

Running Bitcoin Core
bitcoin-26.0-x86_64-linux-gnu and Fulcrum-1.9.7-x86_64-linux on a Ubuntu Container in Proxmox,
While setting up Fulcrum it crashed:

Mar 03 14:19:37 UbuntuBitcoinD Fulcrum[4485]: [2024-03-03 14:19:37.451] BitcoinDMgr: starting 3 bitcoin RPC clients ...
Mar 03 14:19:37 UbuntuBitcoinD Fulcrum[4485]: [2024-03-03 14:19:37.451] BitcoinDMgr: started ok
Mar 03 14:19:37 UbuntuBitcoinD Fulcrum[4485]: [2024-03-03 14:19:37.560] Block height 832984, downloading new blocks ...
Mar 03 14:19:37 UbuntuBitcoinD Fulcrum[4485]: [2024-03-03 14:19:37.561] fast-sync: Enabled; UTXO cache size set to 4000000000 bytes (available physical RAM: 25844260864 bytes)
Mar 03 14:19:51 UbuntuBitcoinD Fulcrum[4485]: [2024-03-03 14:19:51.412] <Task.DL 832622 -> 832984> FATAL: Caught exception processing block 832871: Block 832871 tx f702453dd03b0f055e5437d76128141803984fb10acb85fc3b2184fae2f3fa78 has outN larger than 16777215 (0). This should never happen. Please contact the developers and report this issue.
Mar 03 14:19:51 UbuntuBitcoinD Fulcrum[4485]: [2024-03-03 14:19:51.412] Stopping Controller ...
Mar 03 14:19:51 UbuntuBitcoinD Fulcrum[4485]: [2024-03-03 14:19:51.644] Stopping BitcoinDMgr ...
Mar 03 14:19:51 UbuntuBitcoinD Fulcrum[4485]: [2024-03-03 14:19:51.658] Closing storage ...
Mar 03 14:19:51 UbuntuBitcoinD Fulcrum[4485]: [2024-03-03 14:19:51.662] Storage UTXO Cache: Flushing to DB ...
Mar 03 14:19:53 UbuntuBitcoinD Fulcrum[4485]: [2024-03-03 14:19:53.256] Shutdown complete

bitcoin.conf:
server=1
txindex=1
daemon=1
rpcport=8332
rpcbind=0.0.0.0
rpcallowip=127.0.0.1
rpcallowip=10.0.0.0/8
rpcallowip=172.0.0.0/8
rpcallowip=192.0.0.0/8
zmqpubrawblock=tcp://0.0.0.0:28332
zmqpubrawtx=tcp://0.0.0.0:28333
zmqpubhashblock=tcp://0.0.0.0:28334
whitelist=127.0.0.1
proxy=127.0.0.1:9050
listen=1
bind=127.0.0.1
onlynet=onion
blocksonly=1
coinstatsindex=1

fulcrum.conf:
peering = false
fast-sync = 4000

The transaction is not included in the block, someone posted the transactiondetails a year ago on stackexchange:
https://bitcoin.stackexchange.com/questions/113321/curiosity-minimal-transaction-accepted-as-valid-zero-input-zero-output
https://mempool.space/de/tx/f702453dd03b0f055e5437d76128141803984fb10acb85fc3b2184fae2f3fa78

Any Idea how to procede?

[cculianu]

How is that transaction in a block?!? It's .. not there. Yet Fulcrum is saying it saw it in a block?

Anyway in latest master I have fixed this (coincidentally I noticed the issue whereby txns with 0 inputs / 0 outputs may produce this error message). I fixed it in the latest commit on master as part of a larger different change I was making.

I am still perplexed as to how you encountered such a txn on the blockchain though.. since it doesn't actually exist.

If you really are stuck I can do a release now for you.. since latest master fixes this. Or maybe you can build off master (Fulcrum 1.10.0, yay!) and try it?

[cculianu]

This txn is invalid by the way -- every txn must have at least 1 input and 1 output. Are you doing something silly / custom?

[cculianu]

By the way this is fixed in the latest 1.10.0 release, which just came out now. Closing.