Bitcoin crashes at startup on my wallet #13509

What behavior did you expect?

I expect the server not to crash.

What was the actual behavior (provide screenshots if the issue is GUI-related)?

Server crashes on startup

How reliably can you reproduce the issue, what are the steps to do so?

Using my wallet (which I obviously can't share).

What version of Bitcoin Core are you using, where did you get it (website, self-compiled, etc)?

0.16.0, 0.16.1 on Ubuntu 16.04 0.15.1 does not crash

Additional info

$ bin/bitcoind -printtoconsole -addresstype=legacy
<snip>
2018-06-20 11:01:30 AddToWalletIfInvolvingMe: Detected a used keypool key, mark all keypool key up to this key as used
bitcoind: wallet/wallet.cpp:4237: void CWallet::LearnRelatedScripts(const CPubKey&, OutputType): Assertion `IsSolvable(*this, witprog)' failed.
Aborted (core dumped)

Is the additional information from your debug log? If not so, could you share the latest entries from your debug.log please? On your Ubuntu system the debug.log file, as well as all other files are placed by default in ~/.bitcoin; If you have used -datadir to set a different data directory, debug.log will be placed there instead.

Do you remember anything "unusual" or usual you did with the wallet before upgrading to 0.16 from 0.15?

@MarcoFalke no, nothing unusual. However, I forgot to mention that there's another node running the same wallet, and actually doing transactions. We use the node that we have this problem on as a "read only" node for the wallet. I think the problem lies with transactions that are made after the backup was made.

@ReneFroger no, I don't see any other wallet related messages in the debug log. Also not with debug=1.

I think this can only happen if the private key of a corresponding key pool pubkey could not been found/accessed. @FreekPaans: you could try to run dumpwallet and inspect the output more deeply.

Is this still an issue with a recent version of Bitcoin Core? If yes, what are the steps to reproduce?