[INFO] fetching crate slab_tree 0.3.2...
[INFO] checking slab_tree-0.3.2 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate slab_tree 0.3.2 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate slab_tree 0.3.2
[INFO] finished tweaking crates.io crate slab_tree 0.3.2
[INFO] tweaked toml for crates.io crate slab_tree 0.3.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate slab_tree 0.3.2 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate slab_tree 0.3.2 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded snowflake v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb7a33c70d43f88ba7bd9eed8e82ff968bc345951e6cb0c2b858e230de7d27ca
[INFO] running `Command { std: "docker" "start" "-a" "bb7a33c70d43f88ba7bd9eed8e82ff968bc345951e6cb0c2b858e230de7d27ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb7a33c70d43f88ba7bd9eed8e82ff968bc345951e6cb0c2b858e230de7d27ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb7a33c70d43f88ba7bd9eed8e82ff968bc345951e6cb0c2b858e230de7d27ca", kill_on_drop: false }`
[INFO] [stdout] bb7a33c70d43f88ba7bd9eed8e82ff968bc345951e6cb0c2b858e230de7d27ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7702fdd2b87e62592d79ed016e7c10f79245dde1d43e1021778efd37bac3e40
[INFO] running `Command { std: "docker" "start" "-a" "e7702fdd2b87e62592d79ed016e7c10f79245dde1d43e1021778efd37bac3e40", kill_on_drop: false }`
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]     Checking slab_tree v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin`
[INFO] [stdout]   --> src/core_tree.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 | #[cfg_attr(tarpaulin, skip)]
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin`
[INFO] [stdout]    --> src/node/node_mut.rs:715:12
[INFO] [stdout]     |
[INFO] [stdout] 715 | #[cfg_attr(tarpaulin, skip)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin`
[INFO] [stdout]    --> src/node/node_ref.rs:288:12
[INFO] [stdout]     |
[INFO] [stdout] 288 | #[cfg_attr(tarpaulin, skip)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin`
[INFO] [stdout]    --> src/slab.rs:117:12
[INFO] [stdout]     |
[INFO] [stdout] 117 | #[cfg_attr(tarpaulin, skip)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin`
[INFO] [stdout]    --> src/tree.rs:583:12
[INFO] [stdout]     |
[INFO] [stdout] 583 | #[cfg_attr(tarpaulin, skip)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin`
[INFO] [stdout]   --> src/core_tree.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 | #[cfg_attr(tarpaulin, skip)]
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin`
[INFO] [stdout]    --> src/node/node_mut.rs:715:12
[INFO] [stdout]     |
[INFO] [stdout] 715 | #[cfg_attr(tarpaulin, skip)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin`
[INFO] [stdout]    --> src/node/node_ref.rs:288:12
[INFO] [stdout]     |
[INFO] [stdout] 288 | #[cfg_attr(tarpaulin, skip)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin`
[INFO] [stdout]    --> src/slab.rs:117:12
[INFO] [stdout]     |
[INFO] [stdout] 117 | #[cfg_attr(tarpaulin, skip)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `tarpaulin`
[INFO] [stdout]    --> src/tree.rs:583:12
[INFO] [stdout]     |
[INFO] [stdout] 583 | #[cfg_attr(tarpaulin, skip)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tarpaulin)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tarpaulin)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/iter.rs:13:55
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub(crate) fn new(node_id: Option<NodeId>, tree: &'a Tree<T>) -> Ancestors<T> {
[INFO] [stdout]    |                                                       ^^             ------------ the lifetime gets resolved as `'a`
[INFO] [stdout]    |                                                       |
[INFO] [stdout]    |                                                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub(crate) fn new(node_id: Option<NodeId>, tree: &'a Tree<T>) -> Ancestors<'a, T> {
[INFO] [stdout]    |                                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/iter.rs:39:55
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub(crate) fn new(node_id: Option<NodeId>, tree: &'a Tree<T>) -> NextSiblings<T> {
[INFO] [stdout]    |                                                       ^^             --------------- the lifetime gets resolved as `'a`
[INFO] [stdout]    |                                                       |
[INFO] [stdout]    |                                                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub(crate) fn new(node_id: Option<NodeId>, tree: &'a Tree<T>) -> NextSiblings<'a, T> {
[INFO] [stdout]    |                                                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_mut.rs:17:46
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub(crate) fn new(node_id: NodeId, tree: &mut Tree<T>) -> NodeMut<T> {
[INFO] [stdout]    |                                              ^^^^^^^^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                                              |
[INFO] [stdout]    |                                              this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub(crate) fn new(node_id: NodeId, tree: &mut Tree<T>) -> NodeMut<'_, T> {
[INFO] [stdout]    |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_mut.rs:79:19
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn parent(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]    |                   ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn parent(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_mut.rs:99:25
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn prev_sibling(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]    |                         ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn prev_sibling(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]    |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:119:25
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn next_sibling(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]     |                         ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn next_sibling(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:139:24
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn first_child(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]     |                        ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn first_child(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:159:23
[INFO] [stdout]     |
[INFO] [stdout] 159 |     pub fn last_child(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]     |                       ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 159 |     pub fn last_child(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]     |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:190:19
[INFO] [stdout]     |
[INFO] [stdout] 190 |     pub fn append(&mut self, data: T) -> NodeMut<T> {
[INFO] [stdout]     |                   ^^^^^^^^^              ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 190 |     pub fn append(&mut self, data: T) -> NodeMut<'_, T> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:234:20
[INFO] [stdout]     |
[INFO] [stdout] 234 |     pub fn prepend(&mut self, data: T) -> NodeMut<T> {
[INFO] [stdout]     |                    ^^^^^^^^^              ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 234 |     pub fn prepend(&mut self, data: T) -> NodeMut<'_, T> {
[INFO] [stdout]     |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:343:19
[INFO] [stdout]     |
[INFO] [stdout] 343 |     pub fn as_ref(&self) -> NodeRef<T> {
[INFO] [stdout]     |                   ^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 343 |     pub fn as_ref(&self) -> NodeRef<'_, T> {
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_ref.rs:19:47
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub(crate) fn new(node_id: NodeId, tree: &'a Tree<T>) -> NodeRef<T> {
[INFO] [stdout]    |                                               ^^             ---------- the lifetime gets resolved as `'a`
[INFO] [stdout]    |                                               |
[INFO] [stdout]    |                                               this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub(crate) fn new(node_id: NodeId, tree: &'a Tree<T>) -> NodeRef<'a, T> {
[INFO] [stdout]    |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_ref.rs:77:19
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn parent(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]    |                   ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn parent(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_ref.rs:98:25
[INFO] [stdout]    |
[INFO] [stdout] 98 |     pub fn prev_sibling(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]    |                         ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 98 |     pub fn prev_sibling(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_ref.rs:119:25
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn next_sibling(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]     |                         ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn next_sibling(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_ref.rs:140:24
[INFO] [stdout]     |
[INFO] [stdout] 140 |     pub fn first_child(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]     |                        ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 140 |     pub fn first_child(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_ref.rs:161:23
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn last_child(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]     |                       ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn last_child(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:199:17
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn root(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]     |                 ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn root(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:219:21
[INFO] [stdout]     |
[INFO] [stdout] 219 |     pub fn root_mut(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]     |                     ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 219 |     pub fn root_mut(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:242:16
[INFO] [stdout]     |
[INFO] [stdout] 242 |     pub fn get(&self, node_id: NodeId) -> Option<NodeRef<T>> {
[INFO] [stdout]     |                ^^^^^                             ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                |
[INFO] [stdout]     |                this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 242 |     pub fn get(&self, node_id: NodeId) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]     |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:268:20
[INFO] [stdout]     |
[INFO] [stdout] 268 |     pub fn get_mut(&mut self, node_id: NodeId) -> Option<NodeMut<T>> {
[INFO] [stdout]     |                    ^^^^^^^^^                             ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 268 |     pub fn get_mut(&mut self, node_id: NodeId) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]     |                                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:463:21
[INFO] [stdout]     |
[INFO] [stdout] 463 |     fn new_node_ref(&self, node_id: NodeId) -> NodeRef<T> {
[INFO] [stdout]     |                     ^^^^^                      ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 463 |     fn new_node_ref(&self, node_id: NodeId) -> NodeRef<'_, T> {
[INFO] [stdout]     |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:467:21
[INFO] [stdout]     |
[INFO] [stdout] 467 |     fn new_node_mut(&mut self, node_id: NodeId) -> NodeMut<T> {
[INFO] [stdout]     |                     ^^^^^^^^^                      ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 467 |     fn new_node_mut(&mut self, node_id: NodeId) -> NodeMut<'_, T> {
[INFO] [stdout]     |                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/iter.rs:13:55
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub(crate) fn new(node_id: Option<NodeId>, tree: &'a Tree<T>) -> Ancestors<T> {
[INFO] [stdout]    |                                                       ^^             ------------ the lifetime gets resolved as `'a`
[INFO] [stdout]    |                                                       |
[INFO] [stdout]    |                                                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub(crate) fn new(node_id: Option<NodeId>, tree: &'a Tree<T>) -> Ancestors<'a, T> {
[INFO] [stdout]    |                                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/iter.rs:39:55
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub(crate) fn new(node_id: Option<NodeId>, tree: &'a Tree<T>) -> NextSiblings<T> {
[INFO] [stdout]    |                                                       ^^             --------------- the lifetime gets resolved as `'a`
[INFO] [stdout]    |                                                       |
[INFO] [stdout]    |                                                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub(crate) fn new(node_id: Option<NodeId>, tree: &'a Tree<T>) -> NextSiblings<'a, T> {
[INFO] [stdout]    |                                                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_mut.rs:17:46
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub(crate) fn new(node_id: NodeId, tree: &mut Tree<T>) -> NodeMut<T> {
[INFO] [stdout]    |                                              ^^^^^^^^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                                              |
[INFO] [stdout]    |                                              this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub(crate) fn new(node_id: NodeId, tree: &mut Tree<T>) -> NodeMut<'_, T> {
[INFO] [stdout]    |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_mut.rs:79:19
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn parent(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]    |                   ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn parent(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_mut.rs:99:25
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn prev_sibling(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]    |                         ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn prev_sibling(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]    |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:119:25
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn next_sibling(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]     |                         ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn next_sibling(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:139:24
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn first_child(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]     |                        ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn first_child(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:159:23
[INFO] [stdout]     |
[INFO] [stdout] 159 |     pub fn last_child(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]     |                       ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 159 |     pub fn last_child(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]     |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:190:19
[INFO] [stdout]     |
[INFO] [stdout] 190 |     pub fn append(&mut self, data: T) -> NodeMut<T> {
[INFO] [stdout]     |                   ^^^^^^^^^              ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 190 |     pub fn append(&mut self, data: T) -> NodeMut<'_, T> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:234:20
[INFO] [stdout]     |
[INFO] [stdout] 234 |     pub fn prepend(&mut self, data: T) -> NodeMut<T> {
[INFO] [stdout]     |                    ^^^^^^^^^              ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 234 |     pub fn prepend(&mut self, data: T) -> NodeMut<'_, T> {
[INFO] [stdout]     |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_mut.rs:343:19
[INFO] [stdout]     |
[INFO] [stdout] 343 |     pub fn as_ref(&self) -> NodeRef<T> {
[INFO] [stdout]     |                   ^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 343 |     pub fn as_ref(&self) -> NodeRef<'_, T> {
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_ref.rs:19:47
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub(crate) fn new(node_id: NodeId, tree: &'a Tree<T>) -> NodeRef<T> {
[INFO] [stdout]    |                                               ^^             ---------- the lifetime gets resolved as `'a`
[INFO] [stdout]    |                                               |
[INFO] [stdout]    |                                               this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub(crate) fn new(node_id: NodeId, tree: &'a Tree<T>) -> NodeRef<'a, T> {
[INFO] [stdout]    |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_ref.rs:77:19
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn parent(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]    |                   ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn parent(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/node/node_ref.rs:98:25
[INFO] [stdout]    |
[INFO] [stdout] 98 |     pub fn prev_sibling(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]    |                         ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 98 |     pub fn prev_sibling(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_ref.rs:119:25
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn next_sibling(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]     |                         ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn next_sibling(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_ref.rs:140:24
[INFO] [stdout]     |
[INFO] [stdout] 140 |     pub fn first_child(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]     |                        ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 140 |     pub fn first_child(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/node/node_ref.rs:161:23
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn last_child(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]     |                       ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn last_child(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:199:17
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn root(&self) -> Option<NodeRef<T>> {
[INFO] [stdout]     |                 ^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn root(&self) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:219:21
[INFO] [stdout]     |
[INFO] [stdout] 219 |     pub fn root_mut(&mut self) -> Option<NodeMut<T>> {
[INFO] [stdout]     |                     ^^^^^^^^^            ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 219 |     pub fn root_mut(&mut self) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:242:16
[INFO] [stdout]     |
[INFO] [stdout] 242 |     pub fn get(&self, node_id: NodeId) -> Option<NodeRef<T>> {
[INFO] [stdout]     |                ^^^^^                             ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                |
[INFO] [stdout]     |                this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 242 |     pub fn get(&self, node_id: NodeId) -> Option<NodeRef<'_, T>> {
[INFO] [stdout]     |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:268:20
[INFO] [stdout]     |
[INFO] [stdout] 268 |     pub fn get_mut(&mut self, node_id: NodeId) -> Option<NodeMut<T>> {
[INFO] [stdout]     |                    ^^^^^^^^^                             ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 268 |     pub fn get_mut(&mut self, node_id: NodeId) -> Option<NodeMut<'_, T>> {
[INFO] [stdout]     |                                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:463:21
[INFO] [stdout]     |
[INFO] [stdout] 463 |     fn new_node_ref(&self, node_id: NodeId) -> NodeRef<T> {
[INFO] [stdout]     |                     ^^^^^                      ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 463 |     fn new_node_ref(&self, node_id: NodeId) -> NodeRef<'_, T> {
[INFO] [stdout]     |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/tree.rs:467:21
[INFO] [stdout]     |
[INFO] [stdout] 467 |     fn new_node_mut(&mut self, node_id: NodeId) -> NodeMut<T> {
[INFO] [stdout]     |                     ^^^^^^^^^                      ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 467 |     fn new_node_mut(&mut self, node_id: NodeId) -> NodeMut<'_, T> {
[INFO] [stdout]     |                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "e7702fdd2b87e62592d79ed016e7c10f79245dde1d43e1021778efd37bac3e40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7702fdd2b87e62592d79ed016e7c10f79245dde1d43e1021778efd37bac3e40", kill_on_drop: false }`
[INFO] [stdout] e7702fdd2b87e62592d79ed016e7c10f79245dde1d43e1021778efd37bac3e40