`forge lint` throws `Error: solar run failed` with latest nightly build

[clemlak]

Component

Forge

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

• Foundry
• Foundryup

What version of Foundry are you on?

1.3.5-nightly (9cd8a95 2025-09-16T06:02:33.471215000Z)

What version of Foundryup are you on?

1.3.0

What command(s) is the bug in?

forge lint

Operating System

macOS (Apple Silicon)

Describe the bug

Running forge lint with the latest nightly build throws Error: solar run failed. Using the latest stable version works fine though.

[DaniPopes]

Can you please provide more context? Any code I can reproduce with, the full output of forge, etc.

There should be diagnostics reported for lints before this error message.

[grandizzy]

bump @clemlak thank you!

[MaxMustermann2]

I can reproduce this on one of my code bases. I am trying to decipher why. It does not error on a fresh folder (generated with forge init) using the same configuration file.

forge Version: 1.3.6-nightly
Commit SHA: 5dbd958d16125937bc761aece6cf3e69883ebdb3
Build Timestamp: 2025-09-17T06:03:07.571539555Z (1758088987)
Build Profile: maxperf

Warning: evm_version 'paris' may be incompatible with solc version. Consider using 'prague'
[⠊] Compiling...
No files changed, compilation skipped
Error: Lint failed: solar run failed

[profile.default]
src = "src"
out = "out"
libs = [
    "lib",
    "node_modules",
]
# ignore warnings about unused parameters
# and code size and init code size: the code size
# issue is not relevant because
# this repository does not make any deployments.
ignored_error_codes = [5667, 5574, 3860]

# turn off the annoying linter
[lint]
exclude_lints = ["unused-import", "unaliased-plain-import"]

Edit: I cannot reproduce this on a public repository just yet.

[grandizzy]

@MaxMustermann2 at minimum would you be able to provide output of running with RUST_LOG=trace ? thank you

[MaxMustermann2]

log.txt

[clemlak]

Same for me, I cannot reproduce it from a fresh repo, however you can try with our project, for example it fails on this branch. I can't share the Rust logs here because the file is 8.5 MB though 🤷

[MaxMustermann2]

Looks like it is a library linking issue. If I copy the libraries from external import lib/imua-contracts/src/libraries to src/libraries, the error goes away.

When running a script without the libraries copied, it reports Error: wasn't able to find artifact for library NetworkConstants at src/libraries/NetworkConstants.sol

[grandizzy]

@MaxMustermann2 can you also pass your remappings config?