Adding one new field to struct makes Contract stop working

rroschin

Hi,

I do have very simple contract (ver1):
contract T { string log; function getLastLog() constant returns (string lastLog) { return log; } function T() { log = "[call end]: T()\n"; } struct TData { uint amount; } mapping (address => uint) balance; mapping (address => TData) mystructmap; function setBalance(address _user, uint _balance) { log = "[call start]: setBalance()\n"; balance[_user] = _balance; mystructmap[_user] = TData({amount: 42}); log = "[call end]: setBalance()\n"; } function getBalance(address _user) external constant returns (uint _balance) { return balance[_user]; } function get42(address _user) external constant returns (uint _fourtytwo) { return mystructmap[_user].amount; } }
I do deploy contract and then call it like this:

1. contract.getLog()
   
2. contract.setBalance(valid_address, 55)
   
3. contract.getLog()
   
4. contract.getBalance(address)
   
5. contract.get42(address)
   

And I get:

1. [call end]: T()
   
2. [call end]: setBalance()
   
3. 55
   
4. 42
   

Now I just add new field to TData structure:
contract T { string log; function getLastLog() constant returns (string lastLog) { return log; } function T() { log = "[call end]: T()\n"; } struct TData { uint somedata; uint amount; } mapping (address => uint) balance; mapping (address => TData) mystructmap; function setBalance(address _user, uint _balance) { log = "[call start]: setBalance()\n"; balance[_user] = _balance; mystructmap[_user] = TData({somedata: 11, amount: 42}); log = "[call end]: setBalance()\n"; } function getBalance(address _user) external constant returns (uint _balance) { return balance[_user]; } function get42(address _user) external constant returns (uint _fourtytwo) { return mystructmap[_user].amount; } }

I do the same calls as above:

1. contract.getLog()
   
2. contract.setBalance(valid_address, 55)
   
3. contract.getLog()
   
4. contract.getBalance(address)
   
5. contract.get42(address)
   

But now I get:

1. [call end]: T()
   
2. [call end]: T()
   
3. 0
   
4. 0
   

Seems like 'setBalance()' function is not executed (or exited somewhere) and state in storage is not changed.

Please help!

Thanks.

rroschin

Answer: http://stackoverflow.com/questions/35600914/adding-one-new-field-to-solidity-struct-makes-ethereum-contract-stop-working