forge coverage --ir-minimum compilation fails with `Error: Unknown key "inliner`

[anajuliabit]

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 (25f24e6 2024-09-30T00:22:05.952969000Z)

What command(s) is the bug in?

forge coverage

Operating System

macOS (Apple Silicon)

Describe the bug

λ forge coverage --ir-minimum --skip test --skip script
Warning! "--ir-minimum" flag enables viaIR with minimum optimization, which can result in inaccurate source mappings.
Only use this flag as a workaround if you are experiencing "stack too deep" errors.
Note that "viaIR" is only available in Solidity 0.8.13 and above.
See more: https://github.com/foundry-rs/foundry/issues/3357
[⠊] Compiling...
[⠒] Compiling 311 files with Solc 0.8.19
[⠢] Compiling 43 files with Solc 0.6.12
[⠆] Compiling 12 files with Solc 0.8.10
[⠰] Solc 0.8.10 finished in 969.96ms
[⠔] Solc 0.6.12 finished in 614.18s
[⠒] Solc 0.8.19 finished in 614.78s
Error: 
Compiler run failed:
Error: Unknown key "inliner

I suspect that the foundry or some dependency is setting the inliner configuration for the compiler under the hood

foundry.toml:

[profile.default]
src = 'src'
out = 'artifacts/foundry'
libs = ['node_modules', 'lib']
test = 'test'
cache_path  = 'artifacts/forge-cache'
fs_permissions = [{ access = "read", path = "./"}]
auto_detect_solc = true
evm_version = 'shanghai' # lock to shanghai to use push0 opcode which is live on base, optimism and Moonbeam
optimizer_runs = 1
rpc_storage_caching = { chains = "all", endpoints = "all" }
ignored_warnings_from = ["src/MErc20Delegator.sol", "src/tokensale/TokenSaleDistributorProxy.sol"]
gas_limit = "18446744073709551615" # u64::MAX
block_gas_limit = "18446744073709551615"

[grandizzy]

@anajuliabit is there any optimizer_details section in toml file? could you share a way to reproduce this failure? thank you!

[anajuliabit]

@grandizzy there is not, you can check here https://github.com/moonwell-fi/moonwell-contracts-v2/blob/main/foundry.toml

to reproduce:

clone https://github.com/moonwell-fi/moonwell-contracts-v2 then run

forge coverage --ir-minimum

[grandizzy]

I am getting a seg fault on solc, so probably not too much we can do here, maybe you can reorg contracts to avoid such...

See more: https://github.com/foundry-rs/foundry/issues/3357
[⠰] Compiling...
[⠔] Compiling 428 files with Solc 0.8.19
[⠒] Compiling 43 files with Solc 0.6.12
[⠑] Compiling 12 files with Solc 0.8.10
[⠘] Solc 0.6.12 finished in 16.31ms
[⠒] Solc 0.8.10 finished in 1.03s
Error: solc exited with signal: 11 (SIGSEGV) (core dumped)
<empty output>