[INFO] updating cached repository NikitaSmall/rust_rpn
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/NikitaSmall/rust_rpn
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/NikitaSmall/rust_rpn" "work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/NikitaSmall/rust_rpn"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/NikitaSmall/rust_rpn'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/NikitaSmall/rust_rpn" "work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/NikitaSmall/rust_rpn"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/NikitaSmall/rust_rpn'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 34a83739d911b80bb25319db4149fbd4084660a3
[INFO] sha for GitHub repo NikitaSmall/rust_rpn: 34a83739d911b80bb25319db4149fbd4084660a3
[INFO] validating manifest of NikitaSmall/rust_rpn on toolchain master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of NikitaSmall/rust_rpn on toolchain try#bad365140e1e8233b42b21af70a407f14ce5fec5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing NikitaSmall/rust_rpn
[INFO] finished frobbing NikitaSmall/rust_rpn
[INFO] frobbed toml for NikitaSmall/rust_rpn written to work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/NikitaSmall/rust_rpn/Cargo.toml
[INFO] started frobbing NikitaSmall/rust_rpn
[INFO] finished frobbing NikitaSmall/rust_rpn
[INFO] frobbed toml for NikitaSmall/rust_rpn written to work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/NikitaSmall/rust_rpn/Cargo.toml
[INFO] crate NikitaSmall/rust_rpn has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking NikitaSmall/rust_rpn against master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980 for pr-56896
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56896/worker-7/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/NikitaSmall/rust_rpn:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2abf0f6130709c8dfc1c5b801d4067622be1c0d3596b53b36090550fec35eb93
[INFO] running `"docker" "start" "-a" "2abf0f6130709c8dfc1c5b801d4067622be1c0d3596b53b36090550fec35eb93"`
[INFO] [stderr]     Checking rpn v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `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 used: `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]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `"docker" "inspect" "2abf0f6130709c8dfc1c5b801d4067622be1c0d3596b53b36090550fec35eb93"`
[INFO] running `"docker" "rm" "-f" "2abf0f6130709c8dfc1c5b801d4067622be1c0d3596b53b36090550fec35eb93"`
[INFO] [stdout] 2abf0f6130709c8dfc1c5b801d4067622be1c0d3596b53b36090550fec35eb93