[INFO] cloning repository https://github.com/Jackkakaya/data_struct_using_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jackkakaya/data_struct_using_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackkakaya%2Fdata_struct_using_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackkakaya%2Fdata_struct_using_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f2b5ea95c1b6805ca2a7782bb5382e2ba2a1925
[INFO] checking Jackkakaya/data_struct_using_rust against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackkakaya%2Fdata_struct_using_rust" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Jackkakaya/data_struct_using_rust on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Jackkakaya/data_struct_using_rust
[INFO] finished tweaking git repo https://github.com/Jackkakaya/data_struct_using_rust
[INFO] tweaked toml for git repo https://github.com/Jackkakaya/data_struct_using_rust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Jackkakaya/data_struct_using_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b27cf396502ee76a99d9e21f4279a9990386955f21bb4ce842741b5fdf70c04a
[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" "b27cf396502ee76a99d9e21f4279a9990386955f21bb4ce842741b5fdf70c04a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b27cf396502ee76a99d9e21f4279a9990386955f21bb4ce842741b5fdf70c04a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b27cf396502ee76a99d9e21f4279a9990386955f21bb4ce842741b5fdf70c04a", kill_on_drop: false }`
[INFO] [stdout] b27cf396502ee76a99d9e21f4279a9990386955f21bb4ce842741b5fdf70c04a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7702540ae25f571eff5d7cf6ceaf3ed300cdd84f36b4096f6851b2f102fc2a54
[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" "7702540ae25f571eff5d7cf6ceaf3ed300cdd84f36b4096f6851b2f102fc2a54", kill_on_drop: false }`
[INFO] [stderr]     Checking data_struct v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/data_struct/double_link_list.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn new(val:T) -> Self {
[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/data_struct/double_link_list.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/data_struct/double_link_list.rs:82:12
[INFO] [stdout]    |
[INFO] [stdout] 82 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/data_struct/double_link_list.rs:86:12
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn insert(&mut self,idx:usize,val:T) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:149:12
[INFO] [stdout]     |
[INFO] [stdout] 149 |     pub fn get(&self,idx:usize) -> &T {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:165:12
[INFO] [stdout]     |
[INFO] [stdout] 165 |     pub fn remove(&mut self,idx:usize) -> T {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn iter(&self) -> DoubleLinkListIter <'_,T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `contains`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:217:12
[INFO] [stdout]     |
[INFO] [stdout] 217 |     pub fn contains(&self,val:&T) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_back`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:221:12
[INFO] [stdout]     |
[INFO] [stdout] 221 |     pub fn push_back(&mut self,val: T) {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_back`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:225:12
[INFO] [stdout]     |
[INFO] [stdout] 225 |     pub fn pop_back(&mut self) -> T {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `back`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:229:12
[INFO] [stdout]     |
[INFO] [stdout] 229 |     pub fn back(&self) -> &T {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_front`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:233:12
[INFO] [stdout]     |
[INFO] [stdout] 233 |     pub fn push_front(&mut self,val:T) {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_front`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:237:12
[INFO] [stdout]     |
[INFO] [stdout] 237 |     pub fn pop_front(&mut self) -> T {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `front`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:241:12
[INFO] [stdout]     |
[INFO] [stdout] 241 |     pub fn front(&self) -> &T {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `back`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:229:12
[INFO] [stdout]     |
[INFO] [stdout] 229 |     pub fn back(&self) -> &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: `front`
[INFO] [stdout]    --> src/data_struct/double_link_list.rs:241:12
[INFO] [stdout]     |
[INFO] [stdout] 241 |     pub fn front(&self) -> &T {
[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 0.82s
[INFO] running `Command { std: "docker" "inspect" "7702540ae25f571eff5d7cf6ceaf3ed300cdd84f36b4096f6851b2f102fc2a54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7702540ae25f571eff5d7cf6ceaf3ed300cdd84f36b4096f6851b2f102fc2a54", kill_on_drop: false }`
[INFO] [stdout] 7702540ae25f571eff5d7cf6ceaf3ed300cdd84f36b4096f6851b2f102fc2a54