[INFO] cloning repository https://github.com/NikitaSmall/rust_rpn
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NikitaSmall/rust_rpn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNikitaSmall%2Frust_rpn"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNikitaSmall%2Frust_rpn'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 34a83739d911b80bb25319db4149fbd4084660a3
[INFO] checking NikitaSmall/rust_rpn against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNikitaSmall%2Frust_rpn" "/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/NikitaSmall/rust_rpn on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/NikitaSmall/rust_rpn
[INFO] finished tweaking git repo https://github.com/NikitaSmall/rust_rpn
[INFO] tweaked toml for git repo https://github.com/NikitaSmall/rust_rpn written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/NikitaSmall/rust_rpn already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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] 83f05faf099258433cfcd24b91dd972fbb23b12022ba42d709207169d40d1e88
[INFO] running `"docker" "start" "-a" "83f05faf099258433cfcd24b91dd972fbb23b12022ba42d709207169d40d1e88"`
[INFO] [stderr]     Checking rpn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: field is never read: `raw`
[INFO] [stderr]   --> src/converter.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     raw: String,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `prededence`
[INFO] [stderr]   --> src/converter.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     prededence: HashMap<Stackable, i8>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `convert`
[INFO] [stderr]   --> src/converter.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn convert(raw: String) -> Converter {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `process`
[INFO] [stderr]   --> src/converter.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn process(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/converter.rs:95:13
[INFO] [stderr]    |
[INFO] [stderr] 95 |         let mut converter = Converter::convert(example_string);
[INFO] [stderr]    |             ----^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/converter.rs:103:13
[INFO] [stderr]     |
[INFO] [stderr] 103 |         let mut converter = Converter::convert(example_string);
[INFO] [stderr]     |             ----^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `"docker" "inspect" "83f05faf099258433cfcd24b91dd972fbb23b12022ba42d709207169d40d1e88"`
[INFO] running `"docker" "rm" "-f" "83f05faf099258433cfcd24b91dd972fbb23b12022ba42d709207169d40d1e88"`
[INFO] [stdout] 83f05faf099258433cfcd24b91dd972fbb23b12022ba42d709207169d40d1e88