[INFO] cloning repository https://github.com/urey-hiker/rustList_test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/urey-hiker/rustList_test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Furey-hiker%2FrustList_test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Furey-hiker%2FrustList_test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1610c6408e4c9cf2174d38915a4a3b79659124ae
[INFO] testing urey-hiker/rustList_test against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Furey-hiker%2FrustList_test" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/urey-hiker/rustList_test
[INFO] finished tweaking git repo https://github.com/urey-hiker/rustList_test
[INFO] tweaked toml for git repo https://github.com/urey-hiker/rustList_test written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/urey-hiker/rustList_test on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/urey-hiker/rustList_test 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" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 664388a263e37585f11cca242f6f64cace4fa2643075871d5270a84585dc5461
[INFO] running `Command { std: "docker" "start" "-a" "664388a263e37585f11cca242f6f64cace4fa2643075871d5270a84585dc5461", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "664388a263e37585f11cca242f6f64cace4fa2643075871d5270a84585dc5461", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "664388a263e37585f11cca242f6f64cace4fa2643075871d5270a84585dc5461", kill_on_drop: false }`
[INFO] [stdout] 664388a263e37585f11cca242f6f64cace4fa2643075871d5270a84585dc5461
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2ab515ebdbee4110c52ea418c2603150e3e239e1740c05a55d67614178e1433
[INFO] running `Command { std: "docker" "start" "-a" "f2ab515ebdbee4110c52ea418c2603150e3e239e1740c05a55d67614178e1433", kill_on_drop: false }`
[INFO] [stderr]    Compiling list_test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]  --> src/listC.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Link<T> = Option<Rc<RefCell<Node<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: struct `Node` is never constructed
[INFO] [stdout]  --> src/listC.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]   --> src/listC.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct List<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Inter` is never constructed
[INFO] [stdout]   --> src/listC.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Inter<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/listC.rs:38:8
[INFO] [stdout]     |
[INFO] [stdout]  37 | impl<T: Clone + Copy> List<T> {
[INFO] [stdout]     | ----------------------------- associated items in this implementation
[INFO] [stdout]  38 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  45 |     fn IntoIter(&mut self) -> Inter<T> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  51 |     fn push(&mut self, v: T) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  66 |     fn pop_front(&mut self) -> Link<T> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  80 |     fn pop_front_val(&mut self) -> Option<T> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  94 |     fn peek_front(&self) -> Option<T> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 103 |     fn peek_front_ref(&self) -> Option<Ref<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `IntoIter` should have a snake case name
[INFO] [stdout]   --> src/listC.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn IntoIter(&mut self) -> Inter<T> {
[INFO] [stdout]    |        ^^^^^^^^ help: convert the identifier to snake case: `into_iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/listC.rs:103:23
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn peek_front_ref(&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] 103 |     fn peek_front_ref(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `peek_front_refMut` should have a snake case name
[INFO] [stdout]    --> src/listC.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `peek_front_ref_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/listC.rs:111:26
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<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] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "f2ab515ebdbee4110c52ea418c2603150e3e239e1740c05a55d67614178e1433", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2ab515ebdbee4110c52ea418c2603150e3e239e1740c05a55d67614178e1433", kill_on_drop: false }`
[INFO] [stdout] f2ab515ebdbee4110c52ea418c2603150e3e239e1740c05a55d67614178e1433
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 353b6ceb376372d5f59b861b5e9d7da14e9149d1f64913211e89baf17bc01cf2
[INFO] running `Command { std: "docker" "start" "-a" "353b6ceb376372d5f59b861b5e9d7da14e9149d1f64913211e89baf17bc01cf2", kill_on_drop: false }`
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]  --> src/listC.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Link<T> = Option<Rc<RefCell<Node<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: struct `Node` is never constructed
[INFO] [stdout]  --> src/listC.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]   --> src/listC.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct List<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Inter` is never constructed
[INFO] [stdout]   --> src/listC.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Inter<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/listC.rs:38:8
[INFO] [stdout]     |
[INFO] [stdout]  37 | impl<T: Clone + Copy> List<T> {
[INFO] [stdout]     | ----------------------------- associated items in this implementation
[INFO] [stdout]  38 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  45 |     fn IntoIter(&mut self) -> Inter<T> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  51 |     fn push(&mut self, v: T) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  66 |     fn pop_front(&mut self) -> Link<T> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  80 |     fn pop_front_val(&mut self) -> Option<T> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  94 |     fn peek_front(&self) -> Option<T> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 103 |     fn peek_front_ref(&self) -> Option<Ref<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `IntoIter` should have a snake case name
[INFO] [stdout]   --> src/listC.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn IntoIter(&mut self) -> Inter<T> {
[INFO] [stdout]    |        ^^^^^^^^ help: convert the identifier to snake case: `into_iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/listC.rs:103:23
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn peek_front_ref(&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] 103 |     fn peek_front_ref(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `peek_front_refMut` should have a snake case name
[INFO] [stdout]    --> src/listC.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `peek_front_ref_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/listC.rs:111:26
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<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] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling list_test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `peek_front` is never used
[INFO] [stdout]   --> src/listC.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl<T: Clone + Copy> List<T> {
[INFO] [stdout]    | ----------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 94 |     fn peek_front(&self) -> 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: method `IntoIter` should have a snake case name
[INFO] [stdout]   --> src/listC.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn IntoIter(&mut self) -> Inter<T> {
[INFO] [stdout]    |        ^^^^^^^^ help: convert the identifier to snake case: `into_iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/listC.rs:103:23
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn peek_front_ref(&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] 103 |     fn peek_front_ref(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `peek_front_refMut` should have a snake case name
[INFO] [stdout]    --> src/listC.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `peek_front_ref_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/listC.rs:111:26
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<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] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ListC` should have a snake case name
[INFO] [stdout]    --> src/listC.rs:124:8
[INFO] [stdout]     |
[INFO] [stdout] 124 |     fn ListC() {
[INFO] [stdout]     |        ^^^^^ help: convert the identifier to snake case: `list_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "353b6ceb376372d5f59b861b5e9d7da14e9149d1f64913211e89baf17bc01cf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "353b6ceb376372d5f59b861b5e9d7da14e9149d1f64913211e89baf17bc01cf2", kill_on_drop: false }`
[INFO] [stdout] 353b6ceb376372d5f59b861b5e9d7da14e9149d1f64913211e89baf17bc01cf2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4f0aff3c39ecb20ef8d4e29f6ff5683c39b6a8db4318122f6e099a3fc1b5ada4
[INFO] running `Command { std: "docker" "start" "-a" "4f0aff3c39ecb20ef8d4e29f6ff5683c39b6a8db4318122f6e099a3fc1b5ada4", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: type alias `Link` is never used
[INFO] [stdout] running 1 test
[INFO] [stderr]  --> src/listC.rs:4:6
[INFO] [stdout] test test::ListC ... ok
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 4 | type Link<T> = Option<Rc<RefCell<Node<T>>>>;
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]   |      ^^^^
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] running 0 tests
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]  --> src/listC.rs:7:8
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct Node<T> {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `List` is never constructed
[INFO] [stderr]   --> src/listC.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct List<T> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Inter` is never constructed
[INFO] [stderr]   --> src/listC.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct Inter<T> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/listC.rs:38:8
[INFO] [stderr]     |
[INFO] [stderr]  37 | impl<T: Clone + Copy> List<T> {
[INFO] [stderr]     | ----------------------------- associated items in this implementation
[INFO] [stderr]  38 |     fn new() -> Self {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr]  45 |     fn IntoIter(&mut self) -> Inter<T> {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  51 |     fn push(&mut self, v: T) {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr]  66 |     fn pop_front(&mut self) -> Link<T> {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  80 |     fn pop_front_val(&mut self) -> Option<T> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr]  94 |     fn peek_front(&self) -> Option<T> {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 103 |     fn peek_front_ref(&self) -> Option<Ref<T>> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<T>> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `IntoIter` should have a snake case name
[INFO] [stderr]   --> src/listC.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn IntoIter(&mut self) -> Inter<T> {
[INFO] [stderr]    |        ^^^^^^^^ help: convert the identifier to snake case: `into_iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/listC.rs:103:23
[INFO] [stderr]     |
[INFO] [stderr] 103 |     fn peek_front_ref(&self) -> Option<Ref<T>> {
[INFO] [stderr]     |                       ^^^^^            ^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 103 |     fn peek_front_ref(&self) -> Option<Ref<'_, T>> {
[INFO] [stderr]     |                                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: method `peek_front_refMut` should have a snake case name
[INFO] [stderr]    --> src/listC.rs:111:8
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<T>> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `peek_front_ref_mut`
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/listC.rs:111:26
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<T>> {
[INFO] [stderr]     |                          ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                          |
[INFO] [stderr]     |                          the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn peek_front_refMut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stderr]     |                                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: `list_test` (lib) generated 9 warnings (run `cargo fix --lib -p list_test` to apply 2 suggestions)
[INFO] [stderr] warning: method `peek_front` is never used
[INFO] [stderr]   --> src/listC.rs:94:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | impl<T: Clone + Copy> List<T> {
[INFO] [stderr]    | ----------------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 94 |     fn peek_front(&self) -> Option<T> {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `ListC` should have a snake case name
[INFO] [stderr]    --> src/listC.rs:124:8
[INFO] [stderr]     |
[INFO] [stderr] 124 |     fn ListC() {
[INFO] [stderr]     |        ^^^^^ help: convert the identifier to snake case: `list_c`
[INFO] [stderr] 
[INFO] [stderr] warning: `list_test` (lib test) generated 6 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/listC.rs (/opt/rustwide/target/debug/deps/list_test-30e14ce59841f90e)
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/list_test-a3941ffe7b1c6fd6)
[INFO] [stderr]    Doc-tests list_test
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4f0aff3c39ecb20ef8d4e29f6ff5683c39b6a8db4318122f6e099a3fc1b5ada4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f0aff3c39ecb20ef8d4e29f6ff5683c39b6a8db4318122f6e099a3fc1b5ada4", kill_on_drop: false }`
[INFO] [stdout] 4f0aff3c39ecb20ef8d4e29f6ff5683c39b6a8db4318122f6e099a3fc1b5ada4
