[INFO] cloning repository https://github.com/JoramirJr/fem-algos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JoramirJr/fem-algos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoramirJr%2Ffem-algos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoramirJr%2Ffem-algos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 70430351a59a1dcde87669a8c7576bd66a7e7d99
[INFO] checking JoramirJr/fem-algos against try#3857be5045fe74bd0f296f6f4c23db10f8857f73 for pr-156807
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoramirJr%2Ffem-algos" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/JoramirJr/fem-algos
[INFO] finished tweaking git repo https://github.com/JoramirJr/fem-algos
[INFO] tweaked toml for git repo https://github.com/JoramirJr/fem-algos written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JoramirJr/fem-algos on toolchain 3857be5045fe74bd0f296f6f4c23db10f8857f73
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JoramirJr/fem-algos 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" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70c4cddd33c36e35981e761dfc61c60350a0c748a8a821518f9b9d3d31e3d222
[INFO] running `Command { std: "docker" "start" "-a" "70c4cddd33c36e35981e761dfc61c60350a0c748a8a821518f9b9d3d31e3d222", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70c4cddd33c36e35981e761dfc61c60350a0c748a8a821518f9b9d3d31e3d222", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70c4cddd33c36e35981e761dfc61c60350a0c748a8a821518f9b9d3d31e3d222", kill_on_drop: false }`
[INFO] [stdout] 70c4cddd33c36e35981e761dfc61c60350a0c748a8a821518f9b9d3d31e3d222
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 825cba32f41daa910101a516aacc5b17de4730b3e394edc87ba7038b16a05355
[INFO] running `Command { std: "docker" "start" "-a" "825cba32f41daa910101a516aacc5b17de4730b3e394edc87ba7038b16a05355", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking num-complex v0.4.4
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking fem-algos-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `tail` is assigned to, but never used
[INFO] [stdout]   --> src/algos/queue.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |             Some(mut tail) => {
[INFO] [stdout]    |                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_tail` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tail` is never read
[INFO] [stdout]   --> src/algos/queue.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 tail = &mut Box::new(new_node);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bubble_sort` is never used
[INFO] [stdout]  --> src/algos/bubble_sort.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn bubble_sort(mut container: [usize; 7], mut idx: usize) -> [usize; 7] {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `crystal_balls_search` is never used
[INFO] [stdout]  --> src/algos/crystal_balls_search.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn crystal_balls_search(container: &Vec<bool>) -> Option<usize> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `linear_search` is never used
[INFO] [stdout]  --> src/algos/linear_search.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn linear_search(container: [i32; 20], search: i32) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/algos/queue.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]  --> src/algos/queue.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct List<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `peek`, `enqueue`, and `deque` are never used
[INFO] [stdout]   --> src/algos/queue.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl List<usize> {
[INFO] [stdout]    | ---------------- methods in this implementation
[INFO] [stdout] 15 |     //the ideal scenario is a reference return
[INFO] [stdout] 16 |     fn peek(self) -> usize {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn enqueue(&mut self, value: usize) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     fn deque(&mut self) -> Option<usize> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `tail` is assigned to, but never used
[INFO] [stdout]   --> src/algos/queue.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |             Some(mut tail) => {
[INFO] [stdout]    |                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_tail` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tail` is never read
[INFO] [stdout]   --> src/algos/queue.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 tail = &mut Box::new(new_node);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `linear_search` is never used
[INFO] [stdout]  --> src/algos/linear_search.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn linear_search(container: [i32; 20], search: i32) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `peek` is never used
[INFO] [stdout]   --> src/algos/queue.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl List<usize> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 15 |     //the ideal scenario is a reference return
[INFO] [stdout] 16 |     fn peek(self) -> usize {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.91s
[INFO] running `Command { std: "docker" "inspect" "825cba32f41daa910101a516aacc5b17de4730b3e394edc87ba7038b16a05355", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "825cba32f41daa910101a516aacc5b17de4730b3e394edc87ba7038b16a05355", kill_on_drop: false }`
[INFO] [stdout] 825cba32f41daa910101a516aacc5b17de4730b3e394edc87ba7038b16a05355
