forge(build): Compiler run successful with warnings: but no warnings log

[mds1]

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 (bdd1137 2024-07-28T00:21:06.817030000Z)

What command(s) is the bug in?

forge build

Operating System

None

Describe the bug

I haven't been able to create a minimal reproduction of the issue yet, but to reproduce:

1. Clone https://github.com/ethereum-optimism/optimism
2. Checkout the ci/solc-check branch (ci: better solc warnings check ethereum-optimism/optimism#11231)
3. cd packages/contracts-bedrock && forge install
4. Run forge build --force

The output says Compiler run successful with warnings: but not warnings are logged.

$ forge build --force
[⠒] Compiling...
[⠢] Compiling 394 files with Solc 0.8.15
[⠆] Compiling 138 files with Solc 0.8.25
[⠊] Compiling 16 files with Solc 0.8.19
[⠒] Solc 0.8.19 finished in 1.66s
[⠃] Solc 0.8.25 finished in 11.13s
[⠒] Solc 0.8.15 finished in 221.01s
Compiler run successful with warnings:

We thought this may be ignored_error_codes usage, but in my simpler repro case, adding an entry to ignored_error_codes was working as expected and resulted in Compiler run successful!

We are trying to use --deny-warnings in CI, but can't because this bug causes failure even though no warnings are logged:

$ forge build --force --deny-warnings
[⠒] Compiling...
[⠢] Compiling 138 files with Solc 0.8.25
[⠆] Compiling 394 files with Solc 0.8.15
[⠊] Compiling 16 files with Solc 0.8.19
[⠒] Solc 0.8.19 finished in 1.75s
[⠒] Solc 0.8.25 finished in 11.09s
[⠰] Solc 0.8.15 finished in 223.81s
Error: 
Compiler run failed:

I also took a quick look at the logs from running with RUST_LOG=trace forge build --force but couldn't find anything there

[mds1]

@mattsse @klkvr can we get a foundry-rs/compilers bump in this repo also? That way we can update our foundry version to get this fix. Reopening the issue until then :)

[mattsse]

on it