lint: 'reentrancy-events' flags on vm.expectEmit

[wjmelements]

Component

Forge

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

• Foundry
• Foundryup

What version of Foundry are you on?

forge Version: 1.8.1 Commit SHA: 982849d Build Timestamp: 2026-08-28T17:50:20.499955000Z (1787939420) Build Profile: dist

What version of Foundryup are you on?

foundryup: 1.9.2

What command(s) is the bug in?

forge lint

Operating System

macOS (Intel)

Describe the bug

Here is an example from our codebase:

warning[reentrancy-events]: event emitted after an external call; reentrancy can reorder or fabricate logs that off-chain consumers rely on
    ╭▸ test/UnanimousGovernance.t.sol:220:9
    │
220 │         emit UnanimousGovernance.Rejected(taskId, alice);
    │         ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
    │
    ╰ help: https://getfoundry.sh/forge/linting/reentrancy-events

Immediate context:

        vm.expectEmit(true, true, false, false, address(harness));
        emit UnanimousGovernance.Rejected(taskId, alice);
        vm.prank(alice);
        harness.vetoRemoveOwner(bob);

It complains because before that we did the external call:

vm.prank(bob);
harness.removeOwner(bob);

So indeed we are emitting an event after an external call. But that external call and emitted event are necessary to set the preconditions to validate the event is emitted in the callee in the subsequent call.