[INFO] cloning repository https://github.com/keepri/algo-ds
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/keepri/algo-ds" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeepri%2Falgo-ds", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeepri%2Falgo-ds'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e86369b15d0cf927544ada9b2bf15c7edf4c3086
[INFO] checking keepri/algo-ds against try#63132bd615c9bf75e93af8405d00064212331708 for pr-153975
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeepri%2Falgo-ds" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/keepri/algo-ds
[INFO] finished tweaking git repo https://github.com/keepri/algo-ds
[INFO] tweaked toml for git repo https://github.com/keepri/algo-ds written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/keepri/algo-ds on toolchain 63132bd615c9bf75e93af8405d00064212331708
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+63132bd615c9bf75e93af8405d00064212331708" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/keepri/algo-ds 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" "+63132bd615c9bf75e93af8405d00064212331708" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+63132bd615c9bf75e93af8405d00064212331708" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7411229799d1c744aa600b9a10b52b5162df109c306b7cd84161c73ef049fd57
[INFO] running `Command { std: "docker" "start" "-a" "7411229799d1c744aa600b9a10b52b5162df109c306b7cd84161c73ef049fd57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7411229799d1c744aa600b9a10b52b5162df109c306b7cd84161c73ef049fd57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7411229799d1c744aa600b9a10b52b5162df109c306b7cd84161c73ef049fd57", kill_on_drop: false }`
[INFO] [stdout] 7411229799d1c744aa600b9a10b52b5162df109c306b7cd84161c73ef049fd57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+63132bd615c9bf75e93af8405d00064212331708" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc6c5c60abb4e1c051e35094563b1dba560e8002637fba7bea02c08f2ebf4ba1
[INFO] running `Command { std: "docker" "start" "-a" "dc6c5c60abb4e1c051e35094563b1dba560e8002637fba7bea02c08f2ebf4ba1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling eyre v0.6.8
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]   --> src/ds/list/mod.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | trait LinkedListTrait<T> {
[INFO] [stdout]    |       --------------- methods in this trait
[INFO] [stdout] 26 |     fn len(&self) -> usize;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 27 |     fn insert_at(&self, item: T, index: usize) -> ();
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 28 |     fn remove(&self, item: T) -> Option<T>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 29 |     fn remove_at(&self, index: usize) -> Option<T>;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 30 |     fn append(&self, item: T) -> ();
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 31 |     fn prepend(&self, item: T) -> ();
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 32 |     fn get(&self, index: usize) -> Option<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: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ds/queue/mod.rs:82:17
[INFO] [stdout]    |
[INFO] [stdout] 82 |     pub fn peek(&self) -> Option<Ref<T>> {
[INFO] [stdout]    |                 ^^^^^            ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 82 |     pub fn peek(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ds/stack/mod.rs:82:17
[INFO] [stdout]    |
[INFO] [stdout] 82 |     pub fn peek(&self) -> Option<Ref<T>> {
[INFO] [stdout]    |                 ^^^^^            ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 82 |     pub fn peek(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]   --> src/ds/list/mod.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | trait LinkedListTrait<T> {
[INFO] [stdout]    |       --------------- methods in this trait
[INFO] [stdout] 26 |     fn len(&self) -> usize;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 27 |     fn insert_at(&self, item: T, index: usize) -> ();
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 28 |     fn remove(&self, item: T) -> Option<T>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 29 |     fn remove_at(&self, index: usize) -> Option<T>;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 30 |     fn append(&self, item: T) -> ();
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 31 |     fn prepend(&self, item: T) -> ();
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 32 |     fn get(&self, index: usize) -> Option<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: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ds/queue/mod.rs:82:17
[INFO] [stdout]    |
[INFO] [stdout] 82 |     pub fn peek(&self) -> Option<Ref<T>> {
[INFO] [stdout]    |                 ^^^^^            ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 82 |     pub fn peek(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ds/stack/mod.rs:82:17
[INFO] [stdout]    |
[INFO] [stdout] 82 |     pub fn peek(&self) -> Option<Ref<T>> {
[INFO] [stdout]    |                 ^^^^^            ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 82 |     pub fn peek(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.08s
[INFO] running `Command { std: "docker" "inspect" "dc6c5c60abb4e1c051e35094563b1dba560e8002637fba7bea02c08f2ebf4ba1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc6c5c60abb4e1c051e35094563b1dba560e8002637fba7bea02c08f2ebf4ba1", kill_on_drop: false }`
[INFO] [stdout] dc6c5c60abb4e1c051e35094563b1dba560e8002637fba7bea02c08f2ebf4ba1
