[INFO] cloning repository https://github.com/iamfaiz123/ArenaTreeRS
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iamfaiz123/ArenaTreeRS" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiamfaiz123%2FArenaTreeRS", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiamfaiz123%2FArenaTreeRS'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 33147517d734a33d1e3673952413b80a2cb6fdf3
[INFO] checking iamfaiz123/ArenaTreeRS against master#cced03bfd61a304243a34504618ecec86c17063f for pr-157082
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiamfaiz123%2FArenaTreeRS" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/iamfaiz123/ArenaTreeRS
[INFO] finished tweaking git repo https://github.com/iamfaiz123/ArenaTreeRS
[INFO] tweaked toml for git repo https://github.com/iamfaiz123/ArenaTreeRS written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/iamfaiz123/ArenaTreeRS on toolchain cced03bfd61a304243a34504618ecec86c17063f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cced03bfd61a304243a34504618ecec86c17063f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/iamfaiz123/ArenaTreeRS 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" "+cced03bfd61a304243a34504618ecec86c17063f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 502b04f81beab418e83d047c64a6622dc96f57f6bbf354d6754903a79eb71b76
[INFO] running `Command { std: "docker" "start" "502b04f81beab418e83d047c64a6622dc96f57f6bbf354d6754903a79eb71b76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "502b04f81beab418e83d047c64a6622dc96f57f6bbf354d6754903a79eb71b76" "/opt/rustwide/cargo-home/bin/cargo" "+cced03bfd61a304243a34504618ecec86c17063f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "502b04f81beab418e83d047c64a6622dc96f57f6bbf354d6754903a79eb71b76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "502b04f81beab418e83d047c64a6622dc96f57f6bbf354d6754903a79eb71b76" "/opt/rustwide/cargo-home/bin/cargo" "+cced03bfd61a304243a34504618ecec86c17063f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking arena_tree_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/arena/iter.rs:21:16
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn bfs(&self, id: NodeId) -> LevelOrderIterator<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] 21 |     pub fn bfs(&self, id: NodeId) -> LevelOrderIterator<'_, T> {
[INFO] [stdout]    |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/arena/iter.rs:26:24
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn level_order(&self, id: NodeId) -> LevelOrderIterator<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] 26 |     pub fn level_order(&self, id: NodeId) -> LevelOrderIterator<'_, T> {
[INFO] [stdout]    |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/arena/iter.rs:35:25
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn dfs_preorder(&self, id: NodeId) -> DfsIterator<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] 35 |     pub fn dfs_preorder(&self, id: NodeId) -> DfsIterator<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/arena/iter.rs:61:22
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn ancestors(&self, id: NodeId) -> AncestorsIterator<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] 61 |     pub fn ancestors(&self, id: NodeId) -> AncestorsIterator<'_, T> {
[INFO] [stdout]    |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/arena/iter.rs:69:24
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn descendants(&self, id: NodeId) -> DfsIterator<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] 69 |     pub fn descendants(&self, id: NodeId) -> DfsIterator<'_, T> {
[INFO] [stdout]    |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/arena/iter.rs:21:16
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn bfs(&self, id: NodeId) -> LevelOrderIterator<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] 21 |     pub fn bfs(&self, id: NodeId) -> LevelOrderIterator<'_, T> {
[INFO] [stdout]    |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/arena/iter.rs:26:24
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn level_order(&self, id: NodeId) -> LevelOrderIterator<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] 26 |     pub fn level_order(&self, id: NodeId) -> LevelOrderIterator<'_, T> {
[INFO] [stdout]    |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/arena/iter.rs:35:25
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn dfs_preorder(&self, id: NodeId) -> DfsIterator<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] 35 |     pub fn dfs_preorder(&self, id: NodeId) -> DfsIterator<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/arena/iter.rs:61:22
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn ancestors(&self, id: NodeId) -> AncestorsIterator<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] 61 |     pub fn ancestors(&self, id: NodeId) -> AncestorsIterator<'_, T> {
[INFO] [stdout]    |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/arena/iter.rs:69:24
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn descendants(&self, id: NodeId) -> DfsIterator<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] 69 |     pub fn descendants(&self, id: NodeId) -> DfsIterator<'_, T> {
[INFO] [stdout]    |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NodeId`
[INFO] [stdout]  --> src/main.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use arena_tree_rs::{Arena, NodeId};
[INFO] [stdout]   |                            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NodeId`
[INFO] [stdout]  --> src/main.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use arena_tree_rs::{Arena, NodeId};
[INFO] [stdout]   |                            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "502b04f81beab418e83d047c64a6622dc96f57f6bbf354d6754903a79eb71b76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "502b04f81beab418e83d047c64a6622dc96f57f6bbf354d6754903a79eb71b76", kill_on_drop: false }`
[INFO] [stdout] 502b04f81beab418e83d047c64a6622dc96f57f6bbf354d6754903a79eb71b76