[INFO] cloning repository https://github.com/tmacychen/list
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tmacychen/list" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmacychen%2Flist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmacychen%2Flist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 374911aeeff4d5c5fbe87cecd1e059a93048c060
[INFO] checking tmacychen/list against try#6f12b8fe67b4eed2e838dab803ed9493b9d62c0f for pr-79073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmacychen%2Flist" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tmacychen/list on toolchain 6f12b8fe67b4eed2e838dab803ed9493b9d62c0f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tmacychen/list
[INFO] finished tweaking git repo https://github.com/tmacychen/list
[INFO] tweaked toml for git repo https://github.com/tmacychen/list written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/tmacychen/list already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8e0a52d95d5c843b7fcc017a1a429d0f2a0e78ce6a41562071856b7a6dfa2799
[INFO] running `Command { std: "docker" "start" "-a" "8e0a52d95d5c843b7fcc017a1a429d0f2a0e78ce6a41562071856b7a6dfa2799", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e0a52d95d5c843b7fcc017a1a429d0f2a0e78ce6a41562071856b7a6dfa2799", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e0a52d95d5c843b7fcc017a1a429d0f2a0e78ce6a41562071856b7a6dfa2799", kill_on_drop: false }`
[INFO] [stdout] 8e0a52d95d5c843b7fcc017a1a429d0f2a0e78ce6a41562071856b7a6dfa2799
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d49172cafcfce93034fc95c6ed0297719c3af5819406104a404e6e9cb2ab36b0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d49172cafcfce93034fc95c6ed0297719c3af5819406104a404e6e9cb2ab36b0", kill_on_drop: false }`
[INFO] [stderr]     Checking list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `List`
[INFO] [stdout]  --> src/silly1.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct List<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/silly1.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn new() -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_left`
[INFO] [stdout]   --> src/silly1.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn push_left(&mut self, elem: T) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_right`
[INFO] [stdout]   --> src/silly1.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn push_right(&mut self, elem: T) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_left`
[INFO] [stdout]   --> src/silly1.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn pop_left(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_right`
[INFO] [stdout]   --> src/silly1.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn pop_right(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_left`
[INFO] [stdout]   --> src/silly1.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn peek_left(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_right`
[INFO] [stdout]   --> src/silly1.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn peek_right(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_left_mut`
[INFO] [stdout]   --> src/silly1.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn peek_left_mut(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_right_mut`
[INFO] [stdout]   --> src/silly1.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn peek_right_mut(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `go_left`
[INFO] [stdout]   --> src/silly1.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn go_left(&mut self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `go_right`
[INFO] [stdout]   --> src/silly1.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn go_right(&mut self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_right_mut`
[INFO] [stdout]   --> src/silly1.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn peek_right_mut(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `go_right`
[INFO] [stdout]   --> src/silly1.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn go_right(&mut self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "d49172cafcfce93034fc95c6ed0297719c3af5819406104a404e6e9cb2ab36b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d49172cafcfce93034fc95c6ed0297719c3af5819406104a404e6e9cb2ab36b0", kill_on_drop: false }`
[INFO] [stdout] d49172cafcfce93034fc95c6ed0297719c3af5819406104a404e6e9cb2ab36b0