+ # Run mutagen on nightly with TheBlueMatt's fork which exits with non-0 status
+ # if any mutations resulted in anything except test failures to prevent regressions.
+ - if [ "$(rustup show | grep default | grep nightly)" != "" ]; then
+ rm -rf mutagen && git clone https://github.com/TheBlueMatt/mutagen &&
+ cargo install --force --path mutagen/mutagen-runner &&
+ cd lightning &&
+ ~/.cargo/bin/cargo-mutagen --features mutation_testing; fi