Error decoding event with indexed bytes param

[dukei]

• [no] I've asked for help in the Truffle Gitter before filing this issue.

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Issue

When contract transaction fires event with indexed bytes param truffle fails with an exception

1. Contract: MetaCoin should send coin correctly:
   Uncaught Error: Number can only safely store up to 53 bits

Steps to Reproduce

1. Make empty dir
2. Make truffle init in it
3. Change MetaCoin.sol line 13 to
   event Transfer(address indexed _from, address indexed _to, uint256 _value, bytes indexed data);
4. Change MetaCoin.sol line 23 to
   bytes memory empty; Transfer(msg.sender, receiver, amount, empty);
5. Execute truffle test

Expected Behavior

Tests should pass

Actual Results

Test fails with error

4 passing (485ms)
1 failing

1. Contract: MetaCoin should send coin correctly:
   Uncaught Error: Number can only safely store up to 53 bits
   at assert (C:\Users\User\AppData\Roaming\npm\node_modules\truffle\build\cli.bundled.js:126109:21)
   at BN.toNumber (C:\Users\User\AppData\Roaming\npm\node_modules\truffle\build\cli.bundled.js:126609:7)
   at C:\Users\User\AppData\Roaming\npm\node_modules\truffle\build\cli.bundled.js:62400:59
   at Array.forEach (native)
   at decodeParams (C:\Users\User\AppData\Roaming\npm\node_modules\truffle\build\cli.bundled.js:62395:9)
   at Object.decodeEvent (C:\Users\User\AppData\Roaming\npm\node_modules\truffle\build\cli.bundled.js:62441:10)
   at C:\Users\User\AppData\Roaming\npm\node_modules\truffle\build\cli.bundled.js:205589:38
   at Array.map (native)
   at Object.decodeLogs (C:\Users\User\AppData\Roaming\npm\node_modules\truffle\build\cli.bundled.js:205559:19)
   at Object.callback (C:\Users\User\AppData\Roaming\npm\node_modules\truffle\build\cli.bundled.js:205688:35)

Environment

• Operating System: Windows 10
• Truffle version: Truffle v3.4.5 (core: 3.4.5) Solidity v0.4.11 (solc-js)
• Ethereum client: TestRPC
• node version: 7.10.0
• npm version: 4.3.0

[se3000]

• OS: macOS(10.12.6)
• truffle: [email protected]/[email protected] and [email protected]/[email protected].
• Etheruem client: TestRPC
• node: 8.1.4
• npm: 5.0.3

[k06a]

Same for me, raising this event:

event MyEvent(address[] indexed wallets);

gives error:

Uncaught Error: Number can only safely store up to 53 bits
      at assert (node_modules/truffle/build/cli.bundled.js:123137:21)
      at BN.toNumber (node_modules/truffle/build/cli.bundled.js:123637:7)
      at node_modules/truffle/build/cli.bundled.js:80331:59
      at Array.forEach (<anonymous>)
      at decodeParams (node_modules/truffle/build/cli.bundled.js:80327:9)
      at Object.decodeEvent (node_modules/truffle/build/cli.bundled.js:80372:10)
      at node_modules/truffle/build/cli.bundled.js:207924:38
      at Array.map (<anonymous>)
      at Object.decodeLogs (node_modules/truffle/build/cli.bundled.js:207895:19)
      at Object.callback (node_modules/truffle/build/cli.bundled.js:208023:35)

Temporary fixed by removing indexed attribute:

event MyEvent(address[] wallets);

[cgewecke]

Hello all, thanks for reporting. This is an issue at the web3 dependency and relates to decoding dynamically sized solidity data types. At the moment, they're not indexable. More discussion on this topic at issue #728.