scripting: vm.startBroadcast() in setUp() increases nonce by 1

[0xlosh]

Component

Forge

Have you ensured that all of these are up to date?

• Foundry
• Foundryup

What version of Foundry are you on?

forge 0.2.0

What command(s) is the bug in?

forge script

Operating System

Linux

Describe the bug

Contract.sol

contract Contract {
    uint256 public number = 1;
}

Contract.s.sol

contract ContractScript is Script {
    
    function setUp() public {
        vm.startBroadcast();
    }

    function run() public {
        new Contract();
    }
    
}

running
forge script script/Contract.s.sol -f goerli --private-key $pk --broadcast
increases the nonce of the deployer by 1, there is no pending tx/creation after waiting for 1min.

to fix the issue, one have to make a tx from e.g. metamask, i did a self transfer:

as you can see in the screenshot above, the contract creation tx appears!

and confirms:

this only happens when vm.startBroadcast() is in setUp() as far as i know.

[zerosnacks]

vm.startBroadcast is setup now yields:

Traces:
  [101253] → new CounterScript@0x7FA9385bE102ac3EAc297483Dd6233D62b3e1496
    └─ ← [Return] 395 bytes of code

  [2979] CounterScript::setUp()
    ├─ [0] VM::startBroadcast()
    │   └─ ← [Return] 
    └─ ← [Stop] 

  [3011] CounterScript::run()
    ├─ [0] VM::broadcast()
    │   └─ ← [Revert] a broadcast is active already
    └─ ← [Revert] a broadcast is active already


Gas used: 24075
Error: 
script failed: a broadcast is active alread

Marking this as resolved by #5998 as user cannot encounter the reported issue anymore