[INFO] cloning repository https://github.com/tmacychen/list
[INFO] running `"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"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmacychen%2Flist'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 374911aeeff4d5c5fbe87cecd1e059a93048c060
[INFO] checking tmacychen/list against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmacychen%2Flist" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tmacychen/list on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-1/source/Cargo.toml
[INFO] crate git repo https://github.com/tmacychen/list already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5af576894a250b8361ba416ba90f3333aac4c7f8bc220dcdc64dc7143e20a667
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "5af576894a250b8361ba416ba90f3333aac4c7f8bc220dcdc64dc7143e20a667"`
[INFO] [stderr]     Checking list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `List`
[INFO] [stderr]  --> src/silly1.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct List<T> {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/silly1.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     fn new() -> Self {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_left`
[INFO] [stderr]   --> src/silly1.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn push_left(&mut self, elem: T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_right`
[INFO] [stderr]   --> src/silly1.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn push_right(&mut self, elem: T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop_left`
[INFO] [stderr]   --> src/silly1.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn pop_left(&mut self) -> Option<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop_right`
[INFO] [stderr]   --> src/silly1.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn pop_right(&mut self) -> Option<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_left`
[INFO] [stderr]   --> src/silly1.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn peek_left(&self) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_right`
[INFO] [stderr]   --> src/silly1.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn peek_right(&self) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_left_mut`
[INFO] [stderr]   --> src/silly1.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn peek_left_mut(&mut self) -> Option<&mut T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_right_mut`
[INFO] [stderr]   --> src/silly1.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn peek_right_mut(&mut self) -> Option<&mut T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `go_left`
[INFO] [stderr]   --> src/silly1.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn go_left(&mut self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `go_right`
[INFO] [stderr]   --> src/silly1.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn go_right(&mut self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_right_mut`
[INFO] [stderr]   --> src/silly1.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn peek_right_mut(&mut self) -> Option<&mut T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `go_right`
[INFO] [stderr]   --> src/silly1.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn go_right(&mut self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `"docker" "inspect" "5af576894a250b8361ba416ba90f3333aac4c7f8bc220dcdc64dc7143e20a667"`
[INFO] running `"docker" "rm" "-f" "5af576894a250b8361ba416ba90f3333aac4c7f8bc220dcdc64dc7143e20a667"`
[INFO] [stdout] 5af576894a250b8361ba416ba90f3333aac4c7f8bc220dcdc64dc7143e20a667