[INFO] updating cached repository https://github.com/elycruz/rust-book
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/elycruz/rust-book
[INFO] [stderr]    e896ced..aaa8c2f  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] aaa8c2f4a47a7bd6cb9772fe29f430c76340fd9d
[INFO] checking elycruz/rust-book against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Felycruz%2Frust-book" "work/builds/worker-7/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/elycruz/rust-book on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/elycruz/rust-book
[INFO] finished tweaking git repo https://github.com/elycruz/rust-book
[INFO] tweaked toml for git repo https://github.com/elycruz/rust-book written to work/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/elycruz/rust-book already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4db307aabafe7e1f3352b652eb78fc2f8cc0c72f687ad758cee65b56a8761b47
[INFO] running `"docker" "start" "-a" "4db307aabafe7e1f3352b652eb78fc2f8cc0c72f687ad758cee65b56a8761b47"`
[INFO] [stderr]     Checking rust-book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `maximum`
[INFO] [stderr]   --> chp8/main.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn maximum<T: Ord + Debug>(xs: &Vec<T>) -> Option<&T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fib_i64`
[INFO] [stderr]   --> chp3/fib_lib.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn fib_i64(limit: i64) -> Vec<i64> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mean`
[INFO] [stderr]  --> chp8/mean_and_mode.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn mean(v: &Vec<f64>) -> f64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mode`
[INFO] [stderr]   --> chp8/mean_and_mode.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn mode(vs: &Vec<f64>) -> f64 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `FIVE_O`
[INFO] [stderr]  --> chp3/fib_lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | static FIVE_O: f64 = 5.0;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `O_FIVE`
[INFO] [stderr]  --> chp3/fib_lib.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | static O_FIVE: f64 = 0.5;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_phi`
[INFO] [stderr]   --> chp3/fib_lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn get_phi() -> f64 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `nth_fib`
[INFO] [stderr]   --> chp3/fib_lib.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub fn nth_fib(nth: i32) -> i64 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.03s
[INFO] running `"docker" "inspect" "4db307aabafe7e1f3352b652eb78fc2f8cc0c72f687ad758cee65b56a8761b47"`
[INFO] running `"docker" "rm" "-f" "4db307aabafe7e1f3352b652eb78fc2f8cc0c72f687ad758cee65b56a8761b47"`
[INFO] [stdout] 4db307aabafe7e1f3352b652eb78fc2f8cc0c72f687ad758cee65b56a8761b47