[INFO] cloning repository https://github.com/EliKor/rust_stuff
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EliKor/rust_stuff" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEliKor%2Frust_stuff", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEliKor%2Frust_stuff'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c8aa6b49d96ac6ae2bef310f3f8233255492ed47
[INFO] checking EliKor/rust_stuff against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEliKor%2Frust_stuff" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EliKor/rust_stuff on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/EliKor/rust_stuff
[INFO] finished tweaking git repo https://github.com/EliKor/rust_stuff
[INFO] tweaked toml for git repo https://github.com/EliKor/rust_stuff written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/EliKor/rust_stuff already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9743a0b5f55b163753ca0715aa316ab97a8ff180ccd6076d2b3acb6a66143ff
[INFO] running `Command { std: "docker" "start" "-a" "b9743a0b5f55b163753ca0715aa316ab97a8ff180ccd6076d2b3acb6a66143ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9743a0b5f55b163753ca0715aa316ab97a8ff180ccd6076d2b3acb6a66143ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9743a0b5f55b163753ca0715aa316ab97a8ff180ccd6076d2b3acb6a66143ff", kill_on_drop: false }`
[INFO] [stdout] b9743a0b5f55b163753ca0715aa316ab97a8ff180ccd6076d2b3acb6a66143ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 17abcf7e1091634c578f922dbd4fa4f40e89dc7d20ae7fcfddcb7a61164dfc13
[INFO] running `Command { std: "docker" "start" "-a" "17abcf7e1091634c578f922dbd4fa4f40e89dc7d20ae7fcfddcb7a61164dfc13", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_stuff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/binary_tree_path.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn new(val: u32, left: Option<Box<TreeNode>>, right: Option<Box<TreeNode>>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_path`
[INFO] [stdout]   --> src/binary_tree_path.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn longest_path(root: Option<Box<TreeNode>>, max_len: &mut u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/median_list.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/median_list.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn insert(&mut self, x: u32) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_median`
[INFO] [stdout]   --> src/median_list.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn get_median(&self) -> Option<f32> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "17abcf7e1091634c578f922dbd4fa4f40e89dc7d20ae7fcfddcb7a61164dfc13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17abcf7e1091634c578f922dbd4fa4f40e89dc7d20ae7fcfddcb7a61164dfc13", kill_on_drop: false }`
[INFO] [stdout] 17abcf7e1091634c578f922dbd4fa4f40e89dc7d20ae7fcfddcb7a61164dfc13