Thread 'IO Worker #1' panicked at 'arithmetic operation overflow' if RewardContract is activated

[ahiatsevich]

Before filing a new issue, please provide the following information.

I'm running:

• Which Parity version?: v1.12.0-unstable-44c68221a-2018042
• Which operating system?: MacOS
• How installed?: from source, master branch
• Are you fully synchronized?: yes
• Which network are you connected to?: private local network: bootnode + 3 parity nodes
• Did you try to restart the node?: yes
• Consensus: AuthorityRound(Aura) + RewardContract

When I'm trying to execute any tx, nodes always crash with

2018-04-29 19:50:10  Imported #4 0x7e42…f078 (0 txs, 0.00 Mgas, 2 ms, 0.56 KiB)
2018-04-29 19:50:20  Imported #5 0x3271…d879 (0 txs, 0.00 Mgas, 1 ms, 0.56 KiB)
2018-04-29 19:50:27  Fallback to `BlockId::Latest`

====================

stack backtrace:
   0:        0x1066ce244 - backtrace::backtrace::trace::h9ec331e2bbe150c3
   1:        0x1066c946c - backtrace::capture::Backtrace::new_unresolved::h08ad000a3750ef95
   2:        0x1066c93be - backtrace::capture::Backtrace::new::h7ed8d26429ebf908

Thread 'IO Worker #1' panicked at 'arithmetic operation overflow', /Users/ahiatsevich/.cargo/registry/src/github.com-1ecc6299db9ec823/ethereum-types-0.3.1/src/uint.rs:32

This is a bug. Please report it at:

    https://github.com/paritytech/parity/issues/new

But if RewardContract is disabled, everything works fine:

0  Imported #7 0x6b60…3444 (0 txs, 0.00 Mgas, 3 ms, 0.56 KiB)
2018-04-29 19:36:36  Fallback to `BlockId::Latest`
2018-04-29 19:36:40  Transaction mined (hash 0x7ac7e631cb35ded9b17ab48e0e85018d3e7326c871c488778ad09471aa544187)
2018-04-29 19:36:40  Imported #8 0xf727…df60 (1 txs, 0.28 Mgas, 6 ms, 1.49 KiB)
2018-04-29 19:36:50  Imported #9 0x4cb5…5f13 (0 txs, 0.00 Mgas, 1 ms, 0.56 KiB)
2018-04-29 19:37:00  Imported #10 0xf95b…8aee (0 txs, 0.00 Mgas, 1 ms, 0.56 KiB)

steps to reproduce:

• build parity from source, master branch
• start bootnode and 3 parity nodes
• wait for 1st (2nd, 3rd, 11th, does not matter) mined block
• execute any tx via truffle console, for example truffle(local)> Migrations.new()
• as a result, all parity nodes are down with arithmetic operation overflow.

Genesis file: side-chain-demo.json.txt
Node config:
node1.toml.txt

[ascjones]

Is this fixed by #8611?

[ahiatsevich]

Yes, this is. Thanks. Verified Parity/v1.12.0-unstable-80528c534-20180524/x86_64-macos/rustc1.25.0