State Persisting from Local Simulation inside Script File

[danieljoseph18]

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

macOS (Apple Silicon)

Describe the bug

I'm storing the output of a function call in memory, for use as an argument to another function call within my script.

However, the value from the local simulation is being persisted, and used as the argument to the equivalent function call within the context of the onchain simulation too, instead of being thrown to use the new output from the onchain simulation.

For example:

Contract contract = Contract(0xABC);

function run() public {
    vm.startBroadcast();
    bytes32 a = contract.doSomething();
    contract.doSomethingElse(a);
    vm.stopBroadcast();
}

The local simulation is running successfully.

When it comes to the onchain simulation, the value of a === the previous value of a within the local simulation.

a is not being updated with the new value in the context of the onchain simulation.

Traces:

• a = 0x12345...
• contract.doSomething(0x12345...)

Simulated On-chain Traces:

• a = 0x456789...
• contract.doSomething(0x12345...)`
• REVERT (expected 0x456789...)