[INFO] cloning repository https://github.com/mdomans/LFU
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mdomans/LFU" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdomans%2FLFU", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdomans%2FLFU'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0c63537929a09844fee0074849f4578751695002
[INFO] testing mdomans/LFU against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdomans%2FLFU" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mdomans/LFU on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mdomans/LFU
[INFO] finished tweaking git repo https://github.com/mdomans/LFU
[INFO] tweaked toml for git repo https://github.com/mdomans/LFU written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/mdomans/LFU already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] daa4db786e16008af2758dafe39e1085d0953c39e9017112e4c63c49a1d8b1aa
[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" "daa4db786e16008af2758dafe39e1085d0953c39e9017112e4c63c49a1d8b1aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "daa4db786e16008af2758dafe39e1085d0953c39e9017112e4c63c49a1d8b1aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "daa4db786e16008af2758dafe39e1085d0953c39e9017112e4c63c49a1d8b1aa", kill_on_drop: false }`
[INFO] [stdout] daa4db786e16008af2758dafe39e1085d0953c39e9017112e4c63c49a1d8b1aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9b3247a7c5d747a2b37e2a487af9f23d8f7e090ba9df347ba72d42ee0468b86
[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" "d9b3247a7c5d747a2b37e2a487af9f23d8f7e090ba9df347ba72d42ee0468b86", kill_on_drop: false }`
[INFO] [stderr]    Compiling LFU v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Weak`
[INFO] [stdout]  --> src/lib.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::sync::{Arc, Weak};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/lib.rs:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Link`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     type Link = Option<Box<FrequencyNode>>;
[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/lib.rs:25:16
[INFO] [stdout]    |
[INFO] [stdout] 25 |         pub fn new (data: String, key: String, frequency_node: Arc<RefCell<FrequencyNode>>) -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lib.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 38 | ...   pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<Str...
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lib.rs:50:16
[INFO] [stdout]    |
[INFO] [stdout] 50 |         pub fn new() -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `delete_item`
[INFO] [stdout]   --> src/lib.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set`
[INFO] [stdout]   --> src/lib.rs:68:16
[INFO] [stdout]    |
[INFO] [stdout] 68 |         pub fn set(&mut self, key: String, data:String) {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/lib.rs:107:16
[INFO] [stdout]     |
[INFO] [stdout] 107 |         pub fn get(&self, key: String) -> Option<String> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_stats`
[INFO] [stdout]    --> src/lib.rs:113:16
[INFO] [stdout]     |
[INFO] [stdout] 113 |         pub fn print_stats(&self) {
[INFO] [stdout]     |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `LFU` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `lfu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Weak`
[INFO] [stdout]  --> src/lib.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::sync::{Arc, Weak};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/lib.rs:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Link`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     type Link = Option<Box<FrequencyNode>>;
[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/lib.rs:25:16
[INFO] [stdout]    |
[INFO] [stdout] 25 |         pub fn new (data: String, key: String, frequency_node: Arc<RefCell<FrequencyNode>>) -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lib.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 38 | ...   pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<Str...
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lib.rs:50:16
[INFO] [stdout]    |
[INFO] [stdout] 50 |         pub fn new() -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `delete_item`
[INFO] [stdout]   --> src/lib.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set`
[INFO] [stdout]   --> src/lib.rs:68:16
[INFO] [stdout]    |
[INFO] [stdout] 68 |         pub fn set(&mut self, key: String, data:String) {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/lib.rs:107:16
[INFO] [stdout]     |
[INFO] [stdout] 107 |         pub fn get(&self, key: String) -> Option<String> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_stats`
[INFO] [stdout]    --> src/lib.rs:113:16
[INFO] [stdout]     |
[INFO] [stdout] 113 |         pub fn print_stats(&self) {
[INFO] [stdout]     |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `LFU` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `lfu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d9b3247a7c5d747a2b37e2a487af9f23d8f7e090ba9df347ba72d42ee0468b86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9b3247a7c5d747a2b37e2a487af9f23d8f7e090ba9df347ba72d42ee0468b86", kill_on_drop: false }`
[INFO] [stdout] d9b3247a7c5d747a2b37e2a487af9f23d8f7e090ba9df347ba72d42ee0468b86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen" "--no-run" "--message-format=json", 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] c316b5a152b23fa70e9bdd8a1c47b06f9ebcfda5dc4ec7c01278a231367b9aa5
[INFO] running `Command { std: "docker" "start" "-a" "c316b5a152b23fa70e9bdd8a1c47b06f9ebcfda5dc4ec7c01278a231367b9aa5", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `Weak`
[INFO] [stdout]  --> src/lib.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::sync::{Arc, Weak};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/lib.rs:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Link`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     type Link = Option<Box<FrequencyNode>>;
[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/lib.rs:25:16
[INFO] [stdout]    |
[INFO] [stdout] 25 |         pub fn new (data: String, key: String, frequency_node: Arc<RefCell<FrequencyNode>>) -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lib.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 38 | ...   pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<Str...
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lib.rs:50:16
[INFO] [stdout]    |
[INFO] [stdout] 50 |         pub fn new() -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `delete_item`
[INFO] [stdout]   --> src/lib.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set`
[INFO] [stdout]   --> src/lib.rs:68:16
[INFO] [stdout]    |
[INFO] [stdout] 68 |         pub fn set(&mut self, key: String, data:String) {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/lib.rs:107:16
[INFO] [stdout]     |
[INFO] [stdout] 107 |         pub fn get(&self, key: String) -> Option<String> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_stats`
[INFO] [stdout]    --> src/lib.rs:113:16
[INFO] [stdout]     |
[INFO] [stdout] 113 |         pub fn print_stats(&self) {
[INFO] [stdout]     |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `LFU` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `lfu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling LFU v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Weak`
[INFO] [stdout]  --> src/lib.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::sync::{Arc, Weak};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::lfu::FrequencyNode`
[INFO] [stdout]    --> src/lib.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |     use super::lfu::FrequencyNode;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stdout]    --> src/lib.rs:146:28
[INFO] [stdout]     |
[INFO] [stdout] 146 |     use std::collections::{HashMap, HashSet};
[INFO] [stdout]     |                            ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Weak`
[INFO] [stdout]  --> src/lib.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::sync::{Arc, Weak};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::lfu::FrequencyNode`
[INFO] [stdout]    --> src/lib.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |     use super::lfu::FrequencyNode;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stdout]    --> src/lib.rs:146:28
[INFO] [stdout]     |
[INFO] [stdout] 146 |     use std::collections::{HashMap, HashSet};
[INFO] [stdout]     |                            ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/lib.rs:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Link`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     type Link = Option<Box<FrequencyNode>>;
[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/lib.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 38 | ...   pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<Str...
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `delete_item`
[INFO] [stdout]   --> src/lib.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `LFU` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `lfu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/lib.rs:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Link`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     type Link = Option<Box<FrequencyNode>>;
[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/lib.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 38 | ...   pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<Str...
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `delete_item`
[INFO] [stdout]   --> src/lib.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `LFU` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `lfu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.14s
[INFO] running `Command { std: "docker" "inspect" "c316b5a152b23fa70e9bdd8a1c47b06f9ebcfda5dc4ec7c01278a231367b9aa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c316b5a152b23fa70e9bdd8a1c47b06f9ebcfda5dc4ec7c01278a231367b9aa5", kill_on_drop: false }`
[INFO] [stdout] c316b5a152b23fa70e9bdd8a1c47b06f9ebcfda5dc4ec7c01278a231367b9aa5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen", 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] 36334d5b5bba3a7348cd61ebdc487cce3472c099b7a3405dcf4bebde57b40e75
[INFO] running `Command { std: "docker" "start" "-a" "36334d5b5bba3a7348cd61ebdc487cce3472c099b7a3405dcf4bebde57b40e75", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Weak`
[INFO] [stderr]  --> src/lib.rs:4:26
[INFO] [stderr]   |
[INFO] [stderr] 4 |     use std::sync::{Arc, Weak};
[INFO] [stderr]   |                          ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/lib.rs:64:31
[INFO] [stderr]    |
[INFO] [stderr] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stderr]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Link`
[INFO] [stderr]  --> src/lib.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     type Link = Option<Box<FrequencyNode>>;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/lib.rs:25:16
[INFO] [stderr]    |
[INFO] [stderr] 25 |         pub fn new (data: String, key: String, frequency_node: Arc<RefCell<FrequencyNode>>) -> Self {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/lib.rs:38:16
[INFO] [stderr]    |
[INFO] [stderr] 38 | ...   pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<Str...
[INFO] [stderr]    |              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/lib.rs:50:16
[INFO] [stderr]    |
[INFO] [stderr] 50 |         pub fn new() -> Self {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `delete_item`
[INFO] [stderr]   --> src/lib.rs:64:12
[INFO] [stderr]    |
[INFO] [stderr] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set`
[INFO] [stderr]   --> src/lib.rs:68:16
[INFO] [stderr]    |
[INFO] [stderr] 68 |         pub fn set(&mut self, key: String, data:String) {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get`
[INFO] [stderr]    --> src/lib.rs:107:16
[INFO] [stderr]     |
[INFO] [stderr] 107 |         pub fn get(&self, key: String) -> Option<String> {
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print_stats`
[INFO] [stderr]    --> src/lib.rs:113:16
[INFO] [stderr]     |
[INFO] [stderr] 113 |         pub fn print_stats(&self) {
[INFO] [stderr]     |                ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `LFU` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `lfu`
[INFO] [stderr] 
[INFO] [stderr] warning: 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Weak`
[INFO] [stderr]  --> src/lib.rs:4:26
[INFO] [stderr]   |
[INFO] [stderr] 4 |     use std::sync::{Arc, Weak};
[INFO] [stderr]   |                          ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::lfu::FrequencyNode`
[INFO] [stderr]    --> src/lib.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 |     use super::lfu::FrequencyNode;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]    --> src/lib.rs:146:28
[INFO] [stderr]     |
[INFO] [stderr] 146 |     use std::collections::{HashMap, HashSet};
[INFO] [stderr]     |                            ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/lib.rs:64:31
[INFO] [stderr]    |
[INFO] [stderr] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stderr]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Link`
[INFO] [stderr]  --> src/lib.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     type Link = Option<Box<FrequencyNode>>;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/lib.rs:38:16
[INFO] [stderr]    |
[INFO] [stderr] 38 | ...   pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<Str...
[INFO] [stderr]    |              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `delete_item`
[INFO] [stderr]   --> src/lib.rs:64:12
[INFO] [stderr]    |
[INFO] [stderr] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `LFU` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `lfu`
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Weak`
[INFO] [stderr]  --> src/lib.rs:4:26
[INFO] [stderr]   |
[INFO] [stderr] 4 |     use std::sync::{Arc, Weak};
[INFO] [stderr]   |                          ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::lfu::FrequencyNode`
[INFO] [stderr]    --> src/lib.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 |     use super::lfu::FrequencyNode;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `HashMap`, `HashSet`
[INFO] [stderr]    --> src/lib.rs:146:28
[INFO] [stderr]     |
[INFO] [stderr] 146 |     use std::collections::{HashMap, HashSet};
[INFO] [stderr]     |                            ^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/lib.rs:64:31
[INFO] [stderr]    |
[INFO] [stderr] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stderr]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Link`
[INFO] [stderr]  --> src/lib.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     type Link = Option<Box<FrequencyNode>>;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/lib.rs:38:16
[INFO] [stderr]    |
[INFO] [stderr] 38 | ...   pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<Str...
[INFO] [stderr]    |              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `delete_item`
[INFO] [stderr]   --> src/lib.rs:64:12
[INFO] [stderr]    |
[INFO] [stderr] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `LFU` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `lfu`
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/LFU-15d1065b61420196
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/LFU-a5f6935326b80b32
[INFO] [stdout] test tests::basic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests LFU
[INFO] [stdout] test lib::tests::basic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "36334d5b5bba3a7348cd61ebdc487cce3472c099b7a3405dcf4bebde57b40e75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36334d5b5bba3a7348cd61ebdc487cce3472c099b7a3405dcf4bebde57b40e75", kill_on_drop: false }`
[INFO] [stdout] 36334d5b5bba3a7348cd61ebdc487cce3472c099b7a3405dcf4bebde57b40e75