forge test --debug fails with Invalid hex calldata when invoked on tests that take fuzz arguments #5563
Description
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 (6672134 2023-08-08T00:21:59.824374000Z)
What command(s) is the bug in?
forge test --debug
Operating System
None
Describe the bug
This has previously been mentioned in #3438 as a feature request.
I am opening this issue because, if this is not a supported feature, Forge should fail in a way that informs the end user that fuzz test debugging is not supported, perhaps recommending the --sig flag as an alternative (which has a separate open issue, #4722).
Further, the error's implication that calldata was not passed correctly to the debugger, as mentioned in #4722, appears to me to be a bug in the way Forge is relaying fuzz test calldata to the debugger.
Minimal reproduction:
run forge test --debug testFuzz with the following code
pragma solidity ^0.8.17;
import {Test} from "forge-std/Test.sol";
contract FuzzFailTest is Test {
function testFuzz(uint256 arg) public {}
}Results in output:
[⠑] Compiling...
[⠔] Compiling 1 files with 0.8.20
[⠑] Solc 0.8.20 finished in 734.48ms
Compiler run successful!
Error:
Invalid hex calldata
Context:
- Invalid character 'x' at position 1