[INFO] fetching crate microkelvin 0.17.0...
[INFO] testing microkelvin-0.17.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate microkelvin 0.17.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate microkelvin 0.17.0
[INFO] finished tweaking crates.io crate microkelvin 0.17.0
[INFO] tweaked toml for crates.io crate microkelvin 0.17.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate microkelvin 0.17.0 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ranno v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b8591faf552ff5be841990c3814787a3c3bc52125a726425fca569c6403f93e1
[INFO] running `Command { std: "docker" "start" "-a" "b8591faf552ff5be841990c3814787a3c3bc52125a726425fca569c6403f93e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8591faf552ff5be841990c3814787a3c3bc52125a726425fca569c6403f93e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8591faf552ff5be841990c3814787a3c3bc52125a726425fca569c6403f93e1", kill_on_drop: false }`
[INFO] [stdout] b8591faf552ff5be841990c3814787a3c3bc52125a726425fca569c6403f93e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e18689eb9dc8d444830dd2966574237f5dad2013f9ab7fc3eab3002441dfac9
[INFO] running `Command { std: "docker" "start" "-a" "1e18689eb9dc8d444830dd2966574237f5dad2013f9ab7fc3eab3002441dfac9", kill_on_drop: false }`
[INFO] [stderr]    Compiling ranno v0.1.0
[INFO] [stderr]    Compiling microkelvin v0.17.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/branch.rs:85:19
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn levels(&self) -> &[Level<C, A>] {
[INFO] [stdout]    |                   ^^^^^     ^^^^^^^^^^^^^^
[INFO] [stdout]    |                   |         | |
[INFO] [stdout]    |                   |         | the same lifetime is hidden here
[INFO] [stdout]    |                   |         the same lifetime is elided here
[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] 85 |     pub fn levels(&self) -> &[Level<'_, C, A>] {
[INFO] [stdout]    |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/branch.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn top(&self) -> &Level<C, A> {
[INFO] [stdout]    |            ^^^^^     ^^^^^^^^^^^^
[INFO] [stdout]    |            |         ||
[INFO] [stdout]    |            |         |the same lifetime is hidden here
[INFO] [stdout]    |            |         the same lifetime is elided here
[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] 89 |     fn top(&self) -> &Level<'_, C, A> {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/branch.rs:223:19
[INFO] [stdout]     |
[INFO] [stdout] 223 |     pub fn levels(&self) -> &[Level<C, A>] {
[INFO] [stdout]     |                   ^^^^^     ^^^^^^^^^^^^^^
[INFO] [stdout]     |                   |         | |
[INFO] [stdout]     |                   |         | the same lifetime is hidden here
[INFO] [stdout]     |                   |         the same lifetime is elided here
[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] 223 |     pub fn levels(&self) -> &[Level<'_, C, A>] {
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/branch_mut.rs:113:12
[INFO] [stdout]     |
[INFO] [stdout] 113 |     fn top(&self) -> &LevelMut<C, A> {
[INFO] [stdout]     |            ^^^^^     ^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |         ||
[INFO] [stdout]     |            |         |the same lifetime is hidden here
[INFO] [stdout]     |            |         the same lifetime is elided here
[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] 113 |     fn top(&self) -> &LevelMut<'_, C, A> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/compound.rs:53:14
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn child(&self, index: usize) -> Child<Self, A>;
[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] 53 |     fn child(&self, index: usize) -> Child<'_, Self, A>;
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/compound.rs:56:18
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn child_mut(&mut self, index: usize) -> ChildMut<Self, A>;
[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] 56 |     fn child_mut(&mut self, index: usize) -> ChildMut<'_, Self, A>;
[INFO] [stdout]    |                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/walk.rs:91:14
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn first(&self) -> Option<Branch<Self, A>>;
[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] 91 |     fn first(&self) -> Option<Branch<'_, Self, A>>;
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/walk.rs:94:18
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn first_mut(&mut self) -> Option<BranchMut<Self, A>>
[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] 94 |     fn first_mut(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stdout]    |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/walk.rs:104:14
[INFO] [stdout]     |
[INFO] [stdout] 104 |     fn first(&self) -> Option<Branch<Self, A>> {
[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] 104 |     fn first(&self) -> Option<Branch<'_, Self, A>> {
[INFO] [stdout]     |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/walk.rs:108:18
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn first_mut(&mut self) -> Option<BranchMut<Self, A>>
[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] 108 |     fn first_mut(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "1e18689eb9dc8d444830dd2966574237f5dad2013f9ab7fc3eab3002441dfac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e18689eb9dc8d444830dd2966574237f5dad2013f9ab7fc3eab3002441dfac9", kill_on_drop: false }`
[INFO] [stdout] 1e18689eb9dc8d444830dd2966574237f5dad2013f9ab7fc3eab3002441dfac9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b379436b66579afcd2b317b915e9fea58bf91f0a514494e6f90ec8115cc79e1e
[INFO] running `Command { std: "docker" "start" "-a" "b379436b66579afcd2b317b915e9fea58bf91f0a514494e6f90ec8115cc79e1e", kill_on_drop: false }`
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/branch.rs:85:19
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn levels(&self) -> &[Level<C, A>] {
[INFO] [stdout]    |                   ^^^^^     ^^^^^^^^^^^^^^
[INFO] [stdout]    |                   |         | |
[INFO] [stdout]    |                   |         | the same lifetime is hidden here
[INFO] [stdout]    |                   |         the same lifetime is elided here
[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] 85 |     pub fn levels(&self) -> &[Level<'_, C, A>] {
[INFO] [stdout]    |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/branch.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn top(&self) -> &Level<C, A> {
[INFO] [stdout]    |            ^^^^^     ^^^^^^^^^^^^
[INFO] [stdout]    |            |         ||
[INFO] [stdout]    |            |         |the same lifetime is hidden here
[INFO] [stdout]    |            |         the same lifetime is elided here
[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] 89 |     fn top(&self) -> &Level<'_, C, A> {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/branch.rs:223:19
[INFO] [stdout]     |
[INFO] [stdout] 223 |     pub fn levels(&self) -> &[Level<C, A>] {
[INFO] [stdout]     |                   ^^^^^     ^^^^^^^^^^^^^^
[INFO] [stdout]     |                   |         | |
[INFO] [stdout]     |                   |         | the same lifetime is hidden here
[INFO] [stdout]     |                   |         the same lifetime is elided here
[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] 223 |     pub fn levels(&self) -> &[Level<'_, C, A>] {
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/branch_mut.rs:113:12
[INFO] [stdout]     |
[INFO] [stdout] 113 |     fn top(&self) -> &LevelMut<C, A> {
[INFO] [stdout]     |            ^^^^^     ^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |         ||
[INFO] [stdout]     |            |         |the same lifetime is hidden here
[INFO] [stdout]     |            |         the same lifetime is elided here
[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] 113 |     fn top(&self) -> &LevelMut<'_, C, A> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling microkelvin v0.17.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/compound.rs:53:14
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn child(&self, index: usize) -> Child<Self, A>;
[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] 53 |     fn child(&self, index: usize) -> Child<'_, Self, A>;
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/compound.rs:56:18
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn child_mut(&mut self, index: usize) -> ChildMut<Self, A>;
[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] 56 |     fn child_mut(&mut self, index: usize) -> ChildMut<'_, Self, A>;
[INFO] [stdout]    |                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/walk.rs:91:14
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn first(&self) -> Option<Branch<Self, A>>;
[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] 91 |     fn first(&self) -> Option<Branch<'_, Self, A>>;
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/walk.rs:94:18
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn first_mut(&mut self) -> Option<BranchMut<Self, A>>
[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] 94 |     fn first_mut(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stdout]    |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/walk.rs:104:14
[INFO] [stdout]     |
[INFO] [stdout] 104 |     fn first(&self) -> Option<Branch<Self, A>> {
[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] 104 |     fn first(&self) -> Option<Branch<'_, Self, A>> {
[INFO] [stdout]     |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/walk.rs:108:18
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn first_mut(&mut self) -> Option<BranchMut<Self, A>>
[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] 108 |     fn first_mut(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> tests/linked_list.rs:65:14
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn child(&self, index: usize) -> Child<Self, A> {
[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] 65 |     fn child(&self, index: usize) -> Child<'_, Self, A> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> tests/linked_list.rs:74:18
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn child_mut(&mut self, index: usize) -> ChildMut<Self, A> {
[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] 74 |     fn child_mut(&mut self, index: usize) -> ChildMut<'_, Self, A> {
[INFO] [stdout]    |                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/branch.rs:85:19
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn levels(&self) -> &[Level<C, A>] {
[INFO] [stdout]    |                   ^^^^^     ^^^^^^^^^^^^^^
[INFO] [stdout]    |                   |         | |
[INFO] [stdout]    |                   |         | the same lifetime is hidden here
[INFO] [stdout]    |                   |         the same lifetime is elided here
[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] 85 |     pub fn levels(&self) -> &[Level<'_, C, A>] {
[INFO] [stdout]    |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/branch.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn top(&self) -> &Level<C, A> {
[INFO] [stdout]    |            ^^^^^     ^^^^^^^^^^^^
[INFO] [stdout]    |            |         ||
[INFO] [stdout]    |            |         |the same lifetime is hidden here
[INFO] [stdout]    |            |         the same lifetime is elided here
[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] 89 |     fn top(&self) -> &Level<'_, C, A> {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/branch.rs:223:19
[INFO] [stdout]     |
[INFO] [stdout] 223 |     pub fn levels(&self) -> &[Level<C, A>] {
[INFO] [stdout]     |                   ^^^^^     ^^^^^^^^^^^^^^
[INFO] [stdout]     |                   |         | |
[INFO] [stdout]     |                   |         | the same lifetime is hidden here
[INFO] [stdout]     |                   |         the same lifetime is elided here
[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] 223 |     pub fn levels(&self) -> &[Level<'_, C, A>] {
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/branch_mut.rs:113:12
[INFO] [stdout]     |
[INFO] [stdout] 113 |     fn top(&self) -> &LevelMut<C, A> {
[INFO] [stdout]     |            ^^^^^     ^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |         ||
[INFO] [stdout]     |            |         |the same lifetime is hidden here
[INFO] [stdout]     |            |         the same lifetime is elided here
[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] 113 |     fn top(&self) -> &LevelMut<'_, C, A> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/compound.rs:53:14
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn child(&self, index: usize) -> Child<Self, A>;
[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] 53 |     fn child(&self, index: usize) -> Child<'_, Self, A>;
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/compound.rs:56:18
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn child_mut(&mut self, index: usize) -> ChildMut<Self, A>;
[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] 56 |     fn child_mut(&mut self, index: usize) -> ChildMut<'_, Self, A>;
[INFO] [stdout]    |                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/walk.rs:91:14
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn first(&self) -> Option<Branch<Self, A>>;
[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] 91 |     fn first(&self) -> Option<Branch<'_, Self, A>>;
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/walk.rs:94:18
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn first_mut(&mut self) -> Option<BranchMut<Self, A>>
[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] 94 |     fn first_mut(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stdout]    |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/walk.rs:104:14
[INFO] [stdout]     |
[INFO] [stdout] 104 |     fn first(&self) -> Option<Branch<Self, A>> {
[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] 104 |     fn first(&self) -> Option<Branch<'_, Self, A>> {
[INFO] [stdout]     |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/walk.rs:108:18
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn first_mut(&mut self) -> Option<BranchMut<Self, A>>
[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] 108 |     fn first_mut(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "b379436b66579afcd2b317b915e9fea58bf91f0a514494e6f90ec8115cc79e1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b379436b66579afcd2b317b915e9fea58bf91f0a514494e6f90ec8115cc79e1e", kill_on_drop: false }`
[INFO] [stdout] b379436b66579afcd2b317b915e9fea58bf91f0a514494e6f90ec8115cc79e1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d25ad5c7a4f48e1d7a41ea6042bea391893b8eba6b2d43f127e644e6f8796efe
[INFO] running `Command { std: "docker" "start" "-a" "d25ad5c7a4f48e1d7a41ea6042bea391893b8eba6b2d43f127e644e6f8796efe", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/branch.rs:85:19
[INFO] [stderr]    |
[INFO] [stderr] 85 |     pub fn levels(&self) -> &[Level<C, A>] {
[INFO] [stderr]    |                   ^^^^^     ^^^^^^^^^^^^^^
[INFO] [stderr]    |                   |         | |
[INFO] [stderr]    |                   |         | the same lifetime is hidden here
[INFO] [stderr]    |                   |         the same lifetime is elided here
[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] 85 |     pub fn levels(&self) -> &[Level<'_, C, A>] {
[INFO] [stderr]    |                                     +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/branch.rs:89:12
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn top(&self) -> &Level<C, A> {
[INFO] [stderr]    |            ^^^^^     ^^^^^^^^^^^^
[INFO] [stderr]    |            |         ||
[INFO] [stderr]    |            |         |the same lifetime is hidden here
[INFO] [stderr]    |            |         the same lifetime is elided here
[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] 89 |     fn top(&self) -> &Level<'_, C, A> {
[INFO] [stderr]    |                             +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/branch.rs:223:19
[INFO] [stderr]     |
[INFO] [stderr] 223 |     pub fn levels(&self) -> &[Level<C, A>] {
[INFO] [stderr]     |                   ^^^^^     ^^^^^^^^^^^^^^
[INFO] [stderr]     |                   |         | |
[INFO] [stderr]     |                   |         | the same lifetime is hidden here
[INFO] [stderr]     |                   |         the same lifetime is elided here
[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] 223 |     pub fn levels(&self) -> &[Level<'_, C, A>] {
[INFO] [stderr]     |                                     +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/branch_mut.rs:113:12
[INFO] [stderr]     |
[INFO] [stderr] 113 |     fn top(&self) -> &LevelMut<C, A> {
[INFO] [stderr]     |            ^^^^^     ^^^^^^^^^^^^^^^
[INFO] [stderr]     |            |         ||
[INFO] [stderr]     |            |         |the same lifetime is hidden here
[INFO] [stderr]     |            |         the same lifetime is elided here
[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] 113 |     fn top(&self) -> &LevelMut<'_, C, A> {
[INFO] [stderr]     |                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/compound.rs:53:14
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn child(&self, index: usize) -> Child<Self, A>;
[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] 53 |     fn child(&self, index: usize) -> Child<'_, Self, A>;
[INFO] [stderr]    |                                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/compound.rs:56:18
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn child_mut(&mut self, index: usize) -> ChildMut<Self, A>;
[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] 56 |     fn child_mut(&mut self, index: usize) -> ChildMut<'_, Self, A>;
[INFO] [stderr]    |                                                       +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/walk.rs:91:14
[INFO] [stderr]    |
[INFO] [stderr] 91 |     fn first(&self) -> Option<Branch<Self, A>>;
[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] 91 |     fn first(&self) -> Option<Branch<'_, Self, A>>;
[INFO] [stderr]    |                                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/walk.rs:94:18
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn first_mut(&mut self) -> Option<BranchMut<Self, A>>
[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] 94 |     fn first_mut(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stderr]    |                                                 +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/walk.rs:104:14
[INFO] [stderr]     |
[INFO] [stderr] 104 |     fn first(&self) -> Option<Branch<Self, A>> {
[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] 104 |     fn first(&self) -> Option<Branch<'_, Self, A>> {
[INFO] [stderr]     |                                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/walk.rs:108:18
[INFO] [stderr]     |
[INFO] [stderr] 108 |     fn first_mut(&mut self) -> Option<BranchMut<Self, A>>
[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] 108 |     fn first_mut(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stderr]     |                                                 +++
[INFO] [stderr] 
[INFO] [stderr] warning: `microkelvin` (lib) generated 10 warnings (run `cargo fix --lib -p microkelvin` to apply 10 suggestions)
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> tests/linked_list.rs:65:14
[INFO] [stderr]    |
[INFO] [stderr] 65 |     fn child(&self, index: usize) -> Child<Self, A> {
[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] 65 |     fn child(&self, index: usize) -> Child<'_, Self, A> {
[INFO] [stderr]    |                                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> tests/linked_list.rs:74:18
[INFO] [stderr]    |
[INFO] [stderr] 74 |     fn child_mut(&mut self, index: usize) -> ChildMut<Self, A> {
[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] 74 |     fn child_mut(&mut self, index: usize) -> ChildMut<'_, Self, A> {
[INFO] [stderr]    |                                                       +++
[INFO] [stderr] 
[INFO] [stderr] warning: `microkelvin` (test "linked_list") generated 2 warnings (run `cargo fix --test "linked_list"` to apply 2 suggestions)
[INFO] [stderr] warning: `microkelvin` (lib test) generated 10 warnings (10 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/microkelvin-cbc0fc9db0152134)
[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] [stderr]      Running tests/linked_list.rs (/opt/rustwide/target/debug/deps/linked_list-f80ec7d8b75ffd39)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test deref_mapped_mutable_branch ... ok
[INFO] [stdout] test iterate_map_mutable ... ok
[INFO] [stdout] test push ... ok
[INFO] [stdout] test push_cardinality ... ok
[INFO] [stdout] test iterate_map ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.14s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests microkelvin
[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" "d25ad5c7a4f48e1d7a41ea6042bea391893b8eba6b2d43f127e644e6f8796efe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d25ad5c7a4f48e1d7a41ea6042bea391893b8eba6b2d43f127e644e6f8796efe", kill_on_drop: false }`
[INFO] [stdout] d25ad5c7a4f48e1d7a41ea6042bea391893b8eba6b2d43f127e644e6f8796efe
