[INFO] updating cached repository https://github.com/jleahred/fsm_gen
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a23c9a6aa402a5e9db0a80de3f568cf382673545
[INFO] checking jleahred/fsm_gen against master#ba72b15666b2491415aec703a02c2364fe5e2790 for pr-71140
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjleahred%2Ffsm_gen" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jleahred/fsm_gen on toolchain ba72b15666b2491415aec703a02c2364fe5e2790
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jleahred/fsm_gen
[INFO] finished tweaking git repo https://github.com/jleahred/fsm_gen
[INFO] tweaked toml for git repo https://github.com/jleahred/fsm_gen written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jleahred/fsm_gen already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fb26b1cefbccfa4487eb1c02270d47a653ad2b6ab56d9e57ccc381f17da3f600
[INFO] running `"docker" "start" "-a" "fb26b1cefbccfa4487eb1c02270d47a653ad2b6ab56d9e57ccc381f17da3f600"`
[INFO] [stderr]    Compiling peg-runtime v0.6.0
[INFO] [stderr]     Checking idata v0.1.0
[INFO] [stderr]     Checking fomat-macros v0.3.1
[INFO] [stderr]    Compiling structopt-derive v0.2.15
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]    Compiling peg-macros v0.6.0
[INFO] [stderr]     Checking structopt v0.2.15
[INFO] [stderr]     Checking peg v0.6.0
[INFO] [stderr]     Checking fsm_gen v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `ast`
[INFO] [stderr]   --> src/file/dot.rs:11:29
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub(crate) fn generate_file(ast: &crate::parser::Ast, orig_path: &PathBuf) -> Result<(), String> {
[INFO] [stderr]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_ast`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ast`
[INFO] [stderr]   --> src/file/dot.rs:11:29
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub(crate) fn generate_file(ast: &crate::parser::Ast, orig_path: &PathBuf) -> Result<(), String> {
[INFO] [stderr]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_ast`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.75s
[INFO] running `"docker" "inspect" "fb26b1cefbccfa4487eb1c02270d47a653ad2b6ab56d9e57ccc381f17da3f600"`
[INFO] running `"docker" "rm" "-f" "fb26b1cefbccfa4487eb1c02270d47a653ad2b6ab56d9e57ccc381f17da3f600"`
[INFO] [stdout] fb26b1cefbccfa4487eb1c02270d47a653ad2b6ab56d9e57ccc381f17da3f600