[INFO] cloning repository https://github.com/Adenylatcyclase/rust-circle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Adenylatcyclase/rust-circle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdenylatcyclase%2Frust-circle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdenylatcyclase%2Frust-circle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8f83bec6f85bc53da5b4204e976b4795110222a8
[INFO] testing Adenylatcyclase/rust-circle against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdenylatcyclase%2Frust-circle" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Adenylatcyclase/rust-circle on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Adenylatcyclase/rust-circle
[INFO] finished tweaking git repo https://github.com/Adenylatcyclase/rust-circle
[INFO] tweaked toml for git repo https://github.com/Adenylatcyclase/rust-circle written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Adenylatcyclase/rust-circle already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 824770a4229e44aa8b324f7d6698ea944d53e49c1767dbb219003354ee2d8ad3
[INFO] running `Command { std: "docker" "start" "-a" "824770a4229e44aa8b324f7d6698ea944d53e49c1767dbb219003354ee2d8ad3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "824770a4229e44aa8b324f7d6698ea944d53e49c1767dbb219003354ee2d8ad3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "824770a4229e44aa8b324f7d6698ea944d53e49c1767dbb219003354ee2d8ad3", kill_on_drop: false }`
[INFO] [stdout] 824770a4229e44aa8b324f7d6698ea944d53e49c1767dbb219003354ee2d8ad3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55b9cb3c9b12173b7b2df07b0fd9c2ab12661f1e5882feef3676695d18edbf00
[INFO] running `Command { std: "docker" "start" "-a" "55b9cb3c9b12173b7b2df07b0fd9c2ab12661f1e5882feef3676695d18edbf00", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-circle v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `RefMut`
[INFO] [stdout]  --> src/circle_safe_int.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cell::{RefCell, RefMut};
[INFO] [stdout]   |                          ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Circle`
[INFO] [stdout]  --> src/circle_safe_ext.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Circle{
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]  --> src/circle_safe_ext.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Node{
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/circle_safe_ext.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn remove(&mut self) -> i32 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/circle_safe_ext.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn new(val: i32) -> Circle {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/circle_safe_ext.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn value(&self) -> i32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]   --> src/circle_safe_ext.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn next(&mut self) -> i32{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `last`
[INFO] [stdout]   --> src/circle_safe_ext.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn last(&mut self) -> i32{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_after`
[INFO] [stdout]   --> src/circle_safe_ext.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn insert_after(&mut self, val: i32){
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_after_step`
[INFO] [stdout]   --> src/circle_safe_ext.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn insert_after_step(&mut self, val: i32){
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_before`
[INFO] [stdout]   --> src/circle_safe_ext.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub fn insert_before(&mut self, val: i32){
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_before_step`
[INFO] [stdout]   --> src/circle_safe_ext.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn insert_before_step(&mut self, val: i32){
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/circle_safe_ext.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn new(val: i32) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `combine`
[INFO] [stdout]   --> src/circle_safe_ext.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |     pub fn combine(node1: &mut Rc<RefCell<Node>>, node2: &mut Rc<RefCell<Node>>){
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/circle_safe_ext.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn value(&self) -> i32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_after_step`
[INFO] [stdout]   --> src/circle_safe_int.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn push_after_step(&mut self, val: T){
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_before`
[INFO] [stdout]   --> src/circle_safe_int.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn push_before(&mut self, val:T){
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_before_step`
[INFO] [stdout]   --> src/circle_safe_int.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn push_before_step(&mut self, val: T){
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `last`
[INFO] [stdout]   --> src/circle_safe_int.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn last(&mut self) -> &T{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `last`
[INFO] [stdout]    --> src/circle_safe_int.rs:108:12
[INFO] [stdout]     |
[INFO] [stdout] 108 |     pub fn last(&self) -> Option<Rc<Self>> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `advent09`
[INFO] [stdout]   --> src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn advent09(){
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "55b9cb3c9b12173b7b2df07b0fd9c2ab12661f1e5882feef3676695d18edbf00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55b9cb3c9b12173b7b2df07b0fd9c2ab12661f1e5882feef3676695d18edbf00", kill_on_drop: false }`
[INFO] [stdout] 55b9cb3c9b12173b7b2df07b0fd9c2ab12661f1e5882feef3676695d18edbf00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d23d106d188bda046bbb04b18381046e5d5d7934ee8519467e6c972a4632121
[INFO] running `Command { std: "docker" "start" "-a" "3d23d106d188bda046bbb04b18381046e5d5d7934ee8519467e6c972a4632121", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-circle v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `RefMut`
[INFO] [stdout]  --> src/circle_safe_int.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cell::{RefCell, RefMut};
[INFO] [stdout]   |                          ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Circle`
[INFO] [stdout]  --> src/circle_safe_ext.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Circle{
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]  --> src/circle_safe_ext.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Node{
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/circle_safe_ext.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn remove(&mut self) -> i32 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/circle_safe_ext.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn new(val: i32) -> Circle {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/circle_safe_ext.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn value(&self) -> i32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]   --> src/circle_safe_ext.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn next(&mut self) -> i32{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `last`
[INFO] [stdout]   --> src/circle_safe_ext.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn last(&mut self) -> i32{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_after`
[INFO] [stdout]   --> src/circle_safe_ext.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn insert_after(&mut self, val: i32){
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_after_step`
[INFO] [stdout]   --> src/circle_safe_ext.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn insert_after_step(&mut self, val: i32){
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_before`
[INFO] [stdout]   --> src/circle_safe_ext.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub fn insert_before(&mut self, val: i32){
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_before_step`
[INFO] [stdout]   --> src/circle_safe_ext.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn insert_before_step(&mut self, val: i32){
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/circle_safe_ext.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn new(val: i32) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `combine`
[INFO] [stdout]   --> src/circle_safe_ext.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |     pub fn combine(node1: &mut Rc<RefCell<Node>>, node2: &mut Rc<RefCell<Node>>){
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/circle_safe_ext.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn value(&self) -> i32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_after_step`
[INFO] [stdout]   --> src/circle_safe_int.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn push_after_step(&mut self, val: T){
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_before`
[INFO] [stdout]   --> src/circle_safe_int.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn push_before(&mut self, val:T){
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push_before_step`
[INFO] [stdout]   --> src/circle_safe_int.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn push_before_step(&mut self, val: T){
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `last`
[INFO] [stdout]   --> src/circle_safe_int.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn last(&mut self) -> &T{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `last`
[INFO] [stdout]    --> src/circle_safe_int.rs:108:12
[INFO] [stdout]     |
[INFO] [stdout] 108 |     pub fn last(&self) -> Option<Rc<Self>> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `advent09`
[INFO] [stdout]   --> src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn advent09(){
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.55s
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3d23d106d188bda046bbb04b18381046e5d5d7934ee8519467e6c972a4632121", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d23d106d188bda046bbb04b18381046e5d5d7934ee8519467e6c972a4632121", kill_on_drop: false }`
[INFO] [stdout] 3d23d106d188bda046bbb04b18381046e5d5d7934ee8519467e6c972a4632121
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d58866a77e68b74cdfdb48792fd4df26f4e62f9e812e04e1b8385afd09796d34
[INFO] running `Command { std: "docker" "start" "-a" "d58866a77e68b74cdfdb48792fd4df26f4e62f9e812e04e1b8385afd09796d34", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused import: `RefMut`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/circle_safe_int.rs:2:26
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 2 | use std::cell::{RefCell, RefMut};
[INFO] [stdout] 
[INFO] [stderr]   |                          ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Circle`
[INFO] [stderr]  --> src/circle_safe_ext.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Circle{
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]  --> src/circle_safe_ext.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct Node{
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `remove`
[INFO] [stderr]   --> src/circle_safe_ext.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn remove(&mut self) -> i32 {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/circle_safe_ext.rs:28:12
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn new(val: i32) -> Circle {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value`
[INFO] [stderr]   --> src/circle_safe_ext.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn value(&self) -> i32 {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `next`
[INFO] [stderr]   --> src/circle_safe_ext.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn next(&mut self) -> i32{
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `last`
[INFO] [stderr]   --> src/circle_safe_ext.rs:44:12
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn last(&mut self) -> i32{
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `insert_after`
[INFO] [stderr]   --> src/circle_safe_ext.rs:52:12
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn insert_after(&mut self, val: i32){
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `insert_after_step`
[INFO] [stderr]   --> src/circle_safe_ext.rs:62:12
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn insert_after_step(&mut self, val: i32){
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `insert_before`
[INFO] [stderr]   --> src/circle_safe_ext.rs:67:12
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn insert_before(&mut self, val: i32){
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `insert_before_step`
[INFO] [stderr]   --> src/circle_safe_ext.rs:77:12
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn insert_before_step(&mut self, val: i32){
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/circle_safe_ext.rs:84:12
[INFO] [stderr]    |
[INFO] [stderr] 84 |     pub fn new(val: i32) -> Rc<RefCell<Node>> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `combine`
[INFO] [stderr]   --> src/circle_safe_ext.rs:88:12
[INFO] [stderr]    |
[INFO] [stderr] 88 |     pub fn combine(node1: &mut Rc<RefCell<Node>>, node2: &mut Rc<RefCell<Node>>){
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value`
[INFO] [stderr]   --> src/circle_safe_ext.rs:93:12
[INFO] [stderr]    |
[INFO] [stderr] 93 |     pub fn value(&self) -> i32 {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `push_after_step`
[INFO] [stderr]   --> src/circle_safe_int.rs:34:12
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn push_after_step(&mut self, val: T){
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `push_before`
[INFO] [stderr]   --> src/circle_safe_int.rs:43:12
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn push_before(&mut self, val:T){
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `push_before_step`
[INFO] [stderr]   --> src/circle_safe_int.rs:58:12
[INFO] [stderr]    |
[INFO] [stderr] 58 |     pub fn push_before_step(&mut self, val: T){
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `last`
[INFO] [stderr]   --> src/circle_safe_int.rs:71:12
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn last(&mut self) -> &T{
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `last`
[INFO] [stderr]    --> src/circle_safe_int.rs:108:12
[INFO] [stderr]     |
[INFO] [stderr] 108 |     pub fn last(&self) -> Option<Rc<Self>> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `advent09`
[INFO] [stderr]   --> src/main.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn advent09(){
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 21 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_circle-7ff9790730927605)
[INFO] running `Command { std: "docker" "inspect" "d58866a77e68b74cdfdb48792fd4df26f4e62f9e812e04e1b8385afd09796d34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d58866a77e68b74cdfdb48792fd4df26f4e62f9e812e04e1b8385afd09796d34", kill_on_drop: false }`
[INFO] [stdout] d58866a77e68b74cdfdb48792fd4df26f4e62f9e812e04e1b8385afd09796d34