this.balance in Truffle

[hajduakos]

trafficstars

There is a Truffle test failing (Payable.sol). I isolated the issue, and seems like address(this).balance generates an invalid opcode. Even the following very simple example fails with Truffle:

pragma solidity >=0.5.0;

contract ThisBalance {
    uint x;
    function() external payable {
        x = address(this).balance;
    }
}

There was a change in v0.5.13 in the opcode:

Code Generator: Use SELFBALANCE opcode for address(this).balance if using Istanbul EVM.

So there might be some mismatch between the EVM version the compiler targets and the one we run using Truffle.

[dddejan]

Good catch, I was baffled at what's going on. If I change the version to petersburg the test passes. Let's keep this open, we need to upgrade to istanbul when truffle allows.