[INFO] cloning repository https://github.com/aliaxy/Data_Structure_by_Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aliaxy/Data_Structure_by_Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faliaxy%2FData_Structure_by_Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faliaxy%2FData_Structure_by_Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ef8dba5101ab06b5b40fae0d6c54d472506863d8
[INFO] checking aliaxy/Data_Structure_by_Rust against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faliaxy%2FData_Structure_by_Rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/aliaxy/Data_Structure_by_Rust
[INFO] finished tweaking git repo https://github.com/aliaxy/Data_Structure_by_Rust
[INFO] tweaked toml for git repo https://github.com/aliaxy/Data_Structure_by_Rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/aliaxy/Data_Structure_by_Rust on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/aliaxy/Data_Structure_by_Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6480c1273de86da81e147ba159187fa2ba990a24e2fa2364fed24b7a53e588a2
[INFO] running `Command { std: "docker" "start" "-a" "6480c1273de86da81e147ba159187fa2ba990a24e2fa2364fed24b7a53e588a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6480c1273de86da81e147ba159187fa2ba990a24e2fa2364fed24b7a53e588a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6480c1273de86da81e147ba159187fa2ba990a24e2fa2364fed24b7a53e588a2", kill_on_drop: false }`
[INFO] [stdout] 6480c1273de86da81e147ba159187fa2ba990a24e2fa2364fed24b7a53e588a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 536ae72e335ffa7b99c8bc50bb11cba1fb8f56690087ef69410a5a199c30fa47
[INFO] running `Command { std: "docker" "start" "-a" "536ae72e335ffa7b99c8bc50bb11cba1fb8f56690087ef69410a5a199c30fa47", kill_on_drop: false }`
[INFO] [stderr]     Checking data_structure v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `IntoIter` is never constructed
[INFO] [stdout]   --> src/linked_list.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub struct IntoIter<T>(List<T>);
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Iter` is never constructed
[INFO] [stdout]   --> src/linked_list.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct Iter<'a, T: 'a> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `IterMut` is never constructed
[INFO] [stdout]   --> src/linked_list.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub struct IterMut<'a, T: 'a> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/lvec.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]   --> src/lvec.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | type Link<T> = Option<Box<Node<T>>>;
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lvec.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T> Node<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 13 |     fn new(elem: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LVec` is never constructed
[INFO] [stdout]   --> src/lvec.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct LVec<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/lvec.rs:25:8
[INFO] [stdout]     |
[INFO] [stdout]  24 | impl<T: Copy + Debug> LVec<T> {
[INFO] [stdout]     | ----------------------------- associated items in this implementation
[INFO] [stdout]  25 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  32 |     fn clear(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  37 |     fn len(&self) -> usize {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  41 |     fn is_empty(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  45 |     fn push(&mut self, elem: T) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  65 |     fn append(&mut self, other: &mut Self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  73 |     fn insert(&mut self, mut index: usize, elem: T) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  97 |     fn pop(&mut self) -> Option<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |     fn remove(&mut self, index: usize) -> Option<T> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn print(&self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `data_structure` (lib) due to 3 previous errors; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `IntoIter` is never constructed
[INFO] [stdout]   --> src/linked_list.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub struct IntoIter<T>(List<T>);
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Iter` is never constructed
[INFO] [stdout]   --> src/linked_list.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct Iter<'a, T: 'a> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `IterMut` is never constructed
[INFO] [stdout]   --> src/linked_list.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub struct IterMut<'a, T: 'a> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `data_structure` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "536ae72e335ffa7b99c8bc50bb11cba1fb8f56690087ef69410a5a199c30fa47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "536ae72e335ffa7b99c8bc50bb11cba1fb8f56690087ef69410a5a199c30fa47", kill_on_drop: false }`
[INFO] [stdout] 536ae72e335ffa7b99c8bc50bb11cba1fb8f56690087ef69410a5a199c30fa47
