[INFO] updating cached repository KeyboardFire/xkcd1537-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/KeyboardFire/xkcd1537-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/KeyboardFire/xkcd1537-rust" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/KeyboardFire/xkcd1537-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/KeyboardFire/xkcd1537-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/KeyboardFire/xkcd1537-rust" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/KeyboardFire/xkcd1537-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/KeyboardFire/xkcd1537-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 54c82318d7c0ca798ced908cc6d76ce19d1f23e1
[INFO] sha for GitHub repo KeyboardFire/xkcd1537-rust: 54c82318d7c0ca798ced908cc6d76ce19d1f23e1
[INFO] validating manifest of KeyboardFire/xkcd1537-rust on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of KeyboardFire/xkcd1537-rust on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing KeyboardFire/xkcd1537-rust
[INFO] finished frobbing KeyboardFire/xkcd1537-rust
[INFO] frobbed toml for KeyboardFire/xkcd1537-rust written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/KeyboardFire/xkcd1537-rust/Cargo.toml
[INFO] started frobbing KeyboardFire/xkcd1537-rust
[INFO] finished frobbing KeyboardFire/xkcd1537-rust
[INFO] frobbed toml for KeyboardFire/xkcd1537-rust written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/KeyboardFire/xkcd1537-rust/Cargo.toml
[INFO] crate KeyboardFire/xkcd1537-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking KeyboardFire/xkcd1537-rust against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-7/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/KeyboardFire/xkcd1537-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] da6bba02ac021243b4508e4f1b51481f4e224eabec59edcfcd4c5e5a36311aaf
[INFO] running `"docker" "start" "-a" "da6bba02ac021243b4508e4f1b51481f4e224eabec59edcfcd4c5e5a36311aaf"`
[INFO] [stderr]     Checking xkcd1537 v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/main.rs:239:45
[INFO] [stderr]     |
[INFO] [stderr] 239 |             Token::XFunction(Function::Wrap(n)) => { },
[INFO] [stderr]     |                                             ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `XArray`
[INFO] [stderr]   --> src/main.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 |     XArray(Vec<Token>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `exec_rpn`
[INFO] [stderr]    --> src/main.rs:227:1
[INFO] [stderr]     |
[INFO] [stderr] 227 | fn exec_rpn(rpn: Vec<Token>) -> Vec<Token> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/main.rs:239:45
[INFO] [stderr]     |
[INFO] [stderr] 239 |             Token::XFunction(Function::Wrap(n)) => { },
[INFO] [stderr]     |                                             ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `XArray`
[INFO] [stderr]   --> src/main.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 |     XArray(Vec<Token>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `exec_rpn`
[INFO] [stderr]    --> src/main.rs:227:1
[INFO] [stderr]     |
[INFO] [stderr] 227 | fn exec_rpn(rpn: Vec<Token>) -> Vec<Token> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `"docker" "inspect" "da6bba02ac021243b4508e4f1b51481f4e224eabec59edcfcd4c5e5a36311aaf"`
[INFO] running `"docker" "rm" "-f" "da6bba02ac021243b4508e4f1b51481f4e224eabec59edcfcd4c5e5a36311aaf"`
[INFO] [stdout] da6bba02ac021243b4508e4f1b51481f4e224eabec59edcfcd4c5e5a36311aaf