[INFO] fetching crate dltree 0.1.5...
[INFO] testing dltree-0.1.5 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate dltree 0.1.5 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate dltree 0.1.5
[INFO] finished tweaking crates.io crate dltree 0.1.5
[INFO] tweaked toml for crates.io crate dltree 0.1.5 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dltree 0.1.5 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5db77df93efbe0b7de4ab1c531a029ef0fc070bbf2837badfb562809cc81f6ff
[INFO] running `Command { std: "docker" "start" "-a" "5db77df93efbe0b7de4ab1c531a029ef0fc070bbf2837badfb562809cc81f6ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5db77df93efbe0b7de4ab1c531a029ef0fc070bbf2837badfb562809cc81f6ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5db77df93efbe0b7de4ab1c531a029ef0fc070bbf2837badfb562809cc81f6ff", kill_on_drop: false }`
[INFO] [stdout] 5db77df93efbe0b7de4ab1c531a029ef0fc070bbf2837badfb562809cc81f6ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22b28016af1b8db756e8589a2d672de308d47e9bff710456e935986aafe49d39
[INFO] running `Command { std: "docker" "start" "-a" "22b28016af1b8db756e8589a2d672de308d47e9bff710456e935986aafe49d39", kill_on_drop: false }`
[INFO] [stderr]    Compiling dltree v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/tree_elements/tree_element.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn value(&self) -> Ref<T> {
[INFO] [stdout]    |                  ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn value(&self) -> Ref<'_, T> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/tree_elements/tree_element.rs:51:22
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn value_mut(&mut self) -> RefMut<T> {
[INFO] [stdout]    |                      ^^^^^^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn value_mut(&mut self) -> RefMut<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:143:18
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn value(&self) -> Ref<LT> {
[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] 143 |     pub fn value(&self) -> Ref<'_, LT> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:147:22
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn value_mut(&self) -> RefMut<LT> {
[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] 147 |     pub fn value_mut(&self) -> RefMut<'_, LT> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:168:18
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn value(&self) -> Ref<IT> {
[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] 168 |     pub fn value(&self) -> Ref<'_, IT> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:172:22
[INFO] [stdout]     |
[INFO] [stdout] 172 |     pub fn value_mut(&self) -> RefMut<IT> {
[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] 172 |     pub fn value_mut(&self) -> RefMut<'_, IT> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "22b28016af1b8db756e8589a2d672de308d47e9bff710456e935986aafe49d39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22b28016af1b8db756e8589a2d672de308d47e9bff710456e935986aafe49d39", kill_on_drop: false }`
[INFO] [stdout] 22b28016af1b8db756e8589a2d672de308d47e9bff710456e935986aafe49d39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1497179c6181ac429a1a2923d994141c0b06fd19a16845cc9eab38d4f0206f09
[INFO] running `Command { std: "docker" "start" "-a" "1497179c6181ac429a1a2923d994141c0b06fd19a16845cc9eab38d4f0206f09", kill_on_drop: false }`
[INFO] [stderr]    Compiling dltree v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/tree_elements/tree_element.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn value(&self) -> Ref<T> {
[INFO] [stdout]    |                  ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn value(&self) -> Ref<'_, T> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/tree_elements/tree_element.rs:51:22
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn value_mut(&mut self) -> RefMut<T> {
[INFO] [stdout]    |                      ^^^^^^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn value_mut(&mut self) -> RefMut<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:143:18
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn value(&self) -> Ref<LT> {
[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] 143 |     pub fn value(&self) -> Ref<'_, LT> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:147:22
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn value_mut(&self) -> RefMut<LT> {
[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] 147 |     pub fn value_mut(&self) -> RefMut<'_, LT> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:168:18
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn value(&self) -> Ref<IT> {
[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] 168 |     pub fn value(&self) -> Ref<'_, IT> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:172:22
[INFO] [stdout]     |
[INFO] [stdout] 172 |     pub fn value_mut(&self) -> RefMut<IT> {
[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] 172 |     pub fn value_mut(&self) -> RefMut<'_, IT> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/tree_elements/tree_element.rs:45:18
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn value(&self) -> Ref<T> {
[INFO] [stdout]    |                  ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn value(&self) -> Ref<'_, T> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/tree_elements/tree_element.rs:51:22
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn value_mut(&mut self) -> RefMut<T> {
[INFO] [stdout]    |                      ^^^^^^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn value_mut(&mut self) -> RefMut<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:143:18
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn value(&self) -> Ref<LT> {
[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] 143 |     pub fn value(&self) -> Ref<'_, LT> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:147:22
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn value_mut(&self) -> RefMut<LT> {
[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] 147 |     pub fn value_mut(&self) -> RefMut<'_, LT> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:168:18
[INFO] [stdout]     |
[INFO] [stdout] 168 |     pub fn value(&self) -> Ref<IT> {
[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] 168 |     pub fn value(&self) -> Ref<'_, IT> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/tree_elements/tree_element_type.rs:172:22
[INFO] [stdout]     |
[INFO] [stdout] 172 |     pub fn value_mut(&self) -> RefMut<IT> {
[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] 172 |     pub fn value_mut(&self) -> RefMut<'_, IT> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "1497179c6181ac429a1a2923d994141c0b06fd19a16845cc9eab38d4f0206f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1497179c6181ac429a1a2923d994141c0b06fd19a16845cc9eab38d4f0206f09", kill_on_drop: false }`
[INFO] [stdout] 1497179c6181ac429a1a2923d994141c0b06fd19a16845cc9eab38d4f0206f09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a1fa7a639a5606e8e17c64da7d6e91b77d839aa8f3729ae35feb473b3ff4e67b
[INFO] running `Command { std: "docker" "start" "-a" "a1fa7a639a5606e8e17c64da7d6e91b77d839aa8f3729ae35feb473b3ff4e67b", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/tree_elements/tree_element.rs:45:18
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn value(&self) -> Ref<T> {
[INFO] [stderr]    |                  ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn value(&self) -> Ref<'_, T> {
[INFO] [stderr]    |                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/tree_elements/tree_element.rs:51:22
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn value_mut(&mut self) -> RefMut<T> {
[INFO] [stderr]    |                      ^^^^^^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                      |
[INFO] [stderr]    |                      the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn value_mut(&mut self) -> RefMut<'_, T> {
[INFO] [stderr]    |                                           +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/tree_elements/tree_element_type.rs:143:18
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn value(&self) -> Ref<LT> {
[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] 143 |     pub fn value(&self) -> Ref<'_, LT> {
[INFO] [stderr]     |                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/tree_elements/tree_element_type.rs:147:22
[INFO] [stderr]     |
[INFO] [stderr] 147 |     pub fn value_mut(&self) -> RefMut<LT> {
[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] 147 |     pub fn value_mut(&self) -> RefMut<'_, LT> {
[INFO] [stderr]     |                                       +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/tree_elements/tree_element_type.rs:168:18
[INFO] [stderr]     |
[INFO] [stderr] 168 |     pub fn value(&self) -> Ref<IT> {
[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] 168 |     pub fn value(&self) -> Ref<'_, IT> {
[INFO] [stderr]     |                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/tree_elements/tree_element_type.rs:172:22
[INFO] [stderr]     |
[INFO] [stderr] 172 |     pub fn value_mut(&self) -> RefMut<IT> {
[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] 172 |     pub fn value_mut(&self) -> RefMut<'_, IT> {
[INFO] [stderr]     |                                       +++
[INFO] [stderr] 
[INFO] [stderr] warning: `dltree` (lib) generated 6 warnings (run `cargo fix --lib -p dltree` to apply 6 suggestions)
[INFO] [stderr] warning: `dltree` (lib test) generated 6 warnings (6 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/dltree-88088bba80a8baaf)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tree::tests::insert_test ... ok
[INFO] [stdout] test tree::tests::element_rempval_test ... ok
[INFO] [stdout] test tree::tests::replace_test ... ok
[INFO] [stdout] test tree::tests::tree_building_test ... ok
[INFO] [stdout] test tree::tests::value_set_test ... ok
[INFO] [stdout] test tree_elements::tree_element_type::tests::check_integrity_violation ... ok
[INFO] [stdout] test tree::tests::tree_element_test ... ok
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests dltree
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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" "a1fa7a639a5606e8e17c64da7d6e91b77d839aa8f3729ae35feb473b3ff4e67b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1fa7a639a5606e8e17c64da7d6e91b77d839aa8f3729ae35feb473b3ff4e67b", kill_on_drop: false }`
[INFO] [stdout] a1fa7a639a5606e8e17c64da7d6e91b77d839aa8f3729ae35feb473b3ff4e67b
