[INFO] updating cached repository https://github.com/Adenylatcyclase/rust-circle
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8f83bec6f85bc53da5b4204e976b4795110222a8
[INFO] checking Adenylatcyclase/rust-circle against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdenylatcyclase%2Frust-circle" "/workspace/builds/worker-0/source"`
[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 e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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 `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 11cb9b81d428f485ef99466a6a95e51eb433403ba9cafc377f3b8e464851b79f
[INFO] running `"docker" "start" "-a" "11cb9b81d428f485ef99466a6a95e51eb433403ba9cafc377f3b8e464851b79f"`
[INFO] [stderr]     Checking rust-circle v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `RefMut`
[INFO] [stderr]  --> src/circle_safe_int.rs:2:26
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::{RefCell, RefMut};
[INFO] [stderr]   |                          ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `RefMut`
[INFO] [stderr]  --> src/circle_safe_int.rs:2:26
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::{RefCell, RefMut};
[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: method is never used: `remove`
[INFO] [stderr]   --> src/circle_safe_ext.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn remove(&mut self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/circle_safe_ext.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn new(val: i32) -> Circle {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]   --> src/circle_safe_ext.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn value(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next`
[INFO] [stderr]   --> src/circle_safe_ext.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn next(&mut self) -> i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last`
[INFO] [stderr]   --> src/circle_safe_ext.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn last(&mut self) -> i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_after`
[INFO] [stderr]   --> src/circle_safe_ext.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn insert_after(&mut self, val: i32){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_after_step`
[INFO] [stderr]   --> src/circle_safe_ext.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn insert_after_step(&mut self, val: i32){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_before`
[INFO] [stderr]   --> src/circle_safe_ext.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn insert_before(&mut self, val: i32){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_before_step`
[INFO] [stderr]   --> src/circle_safe_ext.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn insert_before_step(&mut self, val: i32){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/circle_safe_ext.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     pub fn new(val: i32) -> Rc<RefCell<Node>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `combine`
[INFO] [stderr]   --> src/circle_safe_ext.rs:88:5
[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: method is never used: `value`
[INFO] [stderr]   --> src/circle_safe_ext.rs:93:5
[INFO] [stderr]    |
[INFO] [stderr] 93 |     pub fn value(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_after_step`
[INFO] [stderr]   --> src/circle_safe_int.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn push_after_step(&mut self, val: T){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_before`
[INFO] [stderr]   --> src/circle_safe_int.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn push_before(&mut self, val:T){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_before_step`
[INFO] [stderr]   --> src/circle_safe_int.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     pub fn push_before_step(&mut self, val: T){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last`
[INFO] [stderr]   --> src/circle_safe_int.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn last(&mut self) -> &T{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last`
[INFO] [stderr]    --> src/circle_safe_int.rs:108:5
[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] 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: method is never used: `remove`
[INFO] [stderr]   --> src/circle_safe_ext.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn remove(&mut self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/circle_safe_ext.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn new(val: i32) -> Circle {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]   --> src/circle_safe_ext.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn value(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next`
[INFO] [stderr]   --> src/circle_safe_ext.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn next(&mut self) -> i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last`
[INFO] [stderr]   --> src/circle_safe_ext.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn last(&mut self) -> i32{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_after`
[INFO] [stderr]   --> src/circle_safe_ext.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn insert_after(&mut self, val: i32){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_after_step`
[INFO] [stderr]   --> src/circle_safe_ext.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn insert_after_step(&mut self, val: i32){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_before`
[INFO] [stderr]   --> src/circle_safe_ext.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn insert_before(&mut self, val: i32){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_before_step`
[INFO] [stderr]   --> src/circle_safe_ext.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn insert_before_step(&mut self, val: i32){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/circle_safe_ext.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     pub fn new(val: i32) -> Rc<RefCell<Node>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `combine`
[INFO] [stderr]   --> src/circle_safe_ext.rs:88:5
[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: method is never used: `value`
[INFO] [stderr]   --> src/circle_safe_ext.rs:93:5
[INFO] [stderr]    |
[INFO] [stderr] 93 |     pub fn value(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_after_step`
[INFO] [stderr]   --> src/circle_safe_int.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn push_after_step(&mut self, val: T){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_before`
[INFO] [stderr]   --> src/circle_safe_int.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn push_before(&mut self, val:T){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_before_step`
[INFO] [stderr]   --> src/circle_safe_int.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     pub fn push_before_step(&mut self, val: T){
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last`
[INFO] [stderr]   --> src/circle_safe_int.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn last(&mut self) -> &T{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `last`
[INFO] [stderr]    --> src/circle_safe_int.rs:108:5
[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 dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "11cb9b81d428f485ef99466a6a95e51eb433403ba9cafc377f3b8e464851b79f"`
[INFO] running `"docker" "rm" "-f" "11cb9b81d428f485ef99466a6a95e51eb433403ba9cafc377f3b8e464851b79f"`
[INFO] [stdout] 11cb9b81d428f485ef99466a6a95e51eb433403ba9cafc377f3b8e464851b79f