e899d4ca6f init: limit bip30 exceptions to coinbase txs (Chris Geihsler)
511eb7fdea Ignore problematic blocks in DisconnectBlock (Chris Geihsler)
Pull request description:
Fixes https://github.com/bitcoin/bitcoin/issues/22596
When using checklevel=4, block verification fails because of duplicate coinbase transactions involving blocks 91812 and 91722. There was already a check in place within `ConnectBlock` to ignore the problematic blocks, but `DisconnectBlock` did not contain a similar check to ignore these blocks when called from `VerifyDB`.
By ignoring these two blocks in `DisconnectBlock`, the block verification process succeeds at checklevel=4.
(Note to reviewers: this is my first contribution to Bitcoin Core, so any feedback is most welcome. Thanks in advance for reviewing!)
## Steps to reproduce:
Use the following bitcoin.conf file and start bitcoind. I only used block data through block ~100000 so that the verification process was much faster.
```
assumevalid=0
checkblocks=0
checklevel=4
```
Without this change, you will see the following error when the blocks are verified:
```
2022-04-14T02:56:44Z init message: Verifying blocks…
2022-04-14T02:56:44Z Verifying last 101881 blocks at level 4
2022-04-14T02:56:44Z [0%]...[10%]...[20%]...[30%]...[40%]...ERROR: VerifyDB(): *** coin database inconsistencies found (last 10160 blocks, 142571 good transactions before that)
2022-04-14T02:57:01Z : Corrupted block database detected.
Please restart with -reindex or -reindex-chainstate to recover.
: Corrupted block database detected.
Please restart with -reindex or -reindex-chainstate to recover.
```
With this change, you will see this instead:
```
2022-04-14T02:32:29Z init message: Verifying blocks…
2022-04-14T02:32:29Z Verifying last 101746 blocks at level 4
2022-04-14T02:32:29Z [0%]...[10%]...[20%]...[30%]...[40%]...[50%]...[60%]...[70%]...[80%]...[90%]...[DONE].
2022-04-14T02:32:48Z No coin database inconsistencies in last 101746 blocks (226126 transactions)
```
ACKs for top commit:
laanwj:
Code review ACK e899d4ca6f
achow101:
ACK e899d4ca6f
jamesob:
(Biased) ACK e899d4ca6f ([`jamesob/ackr/24851.2.seejee.init_ignore_bip_30_verif`](https://github.com/jamesob/bitcoin/tree/ackr/24851.2.seejee.init_ignore_bip_30_verif))
Tree-SHA512: d2f6d25e9619aee32c1a73fe846b1b587698eaa5a4994fa6424f1038f45654f9fd52b74a69843cc84d90168d74827130ccf8e9201502f5d52281acdb20429291
0384b19414