[INFO] cloning repository https://github.com/Jabbslad/computer_science_problems_in_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jabbslad/computer_science_problems_in_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJabbslad%2Fcomputer_science_problems_in_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJabbslad%2Fcomputer_science_problems_in_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 47aeeddfb78234a955608dc81a3b3e81ec22e220
[INFO] checking Jabbslad/computer_science_problems_in_rust against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJabbslad%2Fcomputer_science_problems_in_rust" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Jabbslad/computer_science_problems_in_rust on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Jabbslad/computer_science_problems_in_rust
[INFO] finished tweaking git repo https://github.com/Jabbslad/computer_science_problems_in_rust
[INFO] tweaked toml for git repo https://github.com/Jabbslad/computer_science_problems_in_rust written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/Jabbslad/computer_science_problems_in_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36c34fee0ee571bb4dbfee74c20e5b01942ce448b95fbb731bcccc4cd70f02b0
[INFO] running `Command { std: "docker" "start" "-a" "36c34fee0ee571bb4dbfee74c20e5b01942ce448b95fbb731bcccc4cd70f02b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36c34fee0ee571bb4dbfee74c20e5b01942ce448b95fbb731bcccc4cd70f02b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36c34fee0ee571bb4dbfee74c20e5b01942ce448b95fbb731bcccc4cd70f02b0", kill_on_drop: false }`
[INFO] [stdout] 36c34fee0ee571bb4dbfee74c20e5b01942ce448b95fbb731bcccc4cd70f02b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2588a65cc627e06c1b35112cadf58181311023928414ac9fec2aa85f1c4aec3d
[INFO] running `Command { std: "docker" "start" "-a" "2588a65cc627e06c1b35112cadf58181311023928414ac9fec2aa85f1c4aec3d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking computer_science_problems_in_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `fib_m`
[INFO] [stdout]  --> src/fib.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn fib_m(m: &mut HashMap<i64, i64>, n: i64) -> i64 {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fib_mem`
[INFO] [stdout]   --> src/fib.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn fib_mem(n: i64) -> i64 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fib_iter`
[INFO] [stdout]   --> src/fib.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn fib_iter(n: i64) -> i64 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fib_no_tr`
[INFO] [stdout]   --> src/fib.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn fib_no_tr(n: i64) -> i64 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `BitPair`
[INFO] [stdout]  --> src/compression.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | type BitPair = (bool, bool);
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compress2`
[INFO] [stdout]  --> src/compression.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn compress2(s: String) -> Vec<BitPair> {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `decompress`
[INFO] [stdout]   --> src/compression.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn decompress(v: &Vec<BitPair>) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compress`
[INFO] [stdout]   --> src/compression.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn compress(s: String) -> String {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `random_key`
[INFO] [stdout]  --> src/encryption.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn random_key(n: u32) -> u32 {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.36s
[INFO] running `Command { std: "docker" "inspect" "2588a65cc627e06c1b35112cadf58181311023928414ac9fec2aa85f1c4aec3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2588a65cc627e06c1b35112cadf58181311023928414ac9fec2aa85f1c4aec3d", kill_on_drop: false }`
[INFO] [stdout] 2588a65cc627e06c1b35112cadf58181311023928414ac9fec2aa85f1c4aec3d