[INFO] cloning repository https://github.com/jbarthelmess/practice_collections
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jbarthelmess/practice_collections" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjbarthelmess%2Fpractice_collections", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjbarthelmess%2Fpractice_collections'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1eaa7be0ef06c5642c5ab359566795fb056d2bbd
[INFO] testing jbarthelmess/practice_collections against 1.98.0-beta.1 for beta-1.98-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjbarthelmess%2Fpractice_collections" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jbarthelmess/practice_collections
[INFO] finished tweaking git repo https://github.com/jbarthelmess/practice_collections
[INFO] tweaked toml for git repo https://github.com/jbarthelmess/practice_collections written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jbarthelmess/practice_collections on toolchain 1.98.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.98.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jbarthelmess/practice_collections 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" "+1.98.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f
[INFO] running `Command { std: "docker" "start" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling getrandom v0.2.7
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling practice_collections v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/graph.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Node<T> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 11 |     id: T
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/heap.rs:42:25
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn drain_sorted(&mut self) -> HeapOrderedDrainIterator<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] 42 |     pub fn drain_sorted(&mut self) -> HeapOrderedDrainIterator<'_, T> {
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/avl_tree.rs:242:17
[INFO] [stdout]     |
[INFO] [stdout] 242 |     pub fn iter(&self) -> TreeIterator<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] 242 |     pub fn iter(&self) -> TreeIterator<'_, T> {
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.27s
[INFO] running `Command { std: "docker" "inspect" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling practice_collections v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/graph.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Node<T> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 11 |     id: T
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/heap.rs:42:25
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn drain_sorted(&mut self) -> HeapOrderedDrainIterator<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] 42 |     pub fn drain_sorted(&mut self) -> HeapOrderedDrainIterator<'_, T> {
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/avl_tree.rs:242:17
[INFO] [stdout]     |
[INFO] [stdout] 242 |     pub fn iter(&self) -> TreeIterator<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] 242 |     pub fn iter(&self) -> TreeIterator<'_, T> {
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/graph.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Node<T> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 11 |     id: T
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/heap.rs:42:25
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn drain_sorted(&mut self) -> HeapOrderedDrainIterator<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] 42 |     pub fn drain_sorted(&mut self) -> HeapOrderedDrainIterator<'_, T> {
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/avl_tree.rs:242:17
[INFO] [stdout]     |
[INFO] [stdout] 242 |     pub fn iter(&self) -> TreeIterator<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] 242 |     pub fn iter(&self) -> TreeIterator<'_, T> {
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] warning: field `id` is never read
[INFO] [stderr]   --> src/graph.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub struct Node<T> {
[INFO] [stderr]    |            ---- field in this struct
[INFO] [stderr] 11 |     id: T
[INFO] [stderr]    |     ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/heap.rs:42:25
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn drain_sorted(&mut self) -> HeapOrderedDrainIterator<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] 42 |     pub fn drain_sorted(&mut self) -> HeapOrderedDrainIterator<'_, T> {
[INFO] [stderr]    |                                                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/avl_tree.rs:242:17
[INFO] [stderr]     |
[INFO] [stderr] 242 |     pub fn iter(&self) -> TreeIterator<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] 242 |     pub fn iter(&self) -> TreeIterator<'_, T> {
[INFO] [stderr]     |                                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: `practice_collections` (lib) generated 3 warnings (run `cargo fix --lib -p practice_collections` to apply 2 suggestions)
[INFO] [stderr] warning: `practice_collections` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/practice_collections-e68afbec16c142af)
[INFO] [stdout] 
[INFO] [stdout] running 59 tests
[INFO] [stdout] test avl_tree::tests::add_tests::left_rotation_left_heavy_right_child_no_right_child ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::node_add_right ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::node_add_duplicate ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::right_rotation_left_heavy_left_child ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::right_rotation_left_heavy_left_child_no_right_child ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::right_rotation_right_heavy_left_child ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::simple_left_rotation ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::simple_right_rotation ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::right_rotation_right_heavy_left_child_no_left_child ... ok
[INFO] [stdout] test avl_tree::tests::iterator_tests::empty_tree_iterator ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::left_rotation_right_heavy_right_child ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::bigger_tree_test_remove_from_left_half ... ok
[INFO] [stdout] test avl_tree::tests::iterator_tests::initial_iterator_tests ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::bigger_tree_test_remove_from_right_half ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_left ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_left_child_right_heavy_no_neighbor ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_left_child_right_heavy_opposite_neighbor ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_right_child_left_heavy ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_right_child_left_heavy_no_neighbor ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_root_with_right_child ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_right ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_root ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_right_child_left_heavy_opposite_neighbor ... ok
[INFO] [stdout] test avl_tree::tests::search_for_item_not_in_tree ... ok
[INFO] [stdout] test avl_tree::tests::tree_tests::add_to_tree_failure ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_root_with_left_child ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_left_child_right_heavy ... ok
[INFO] [stdout] test avl_tree::tests::tree_tests::remove_from_empty_tree ... ok
[INFO] [stdout] test avl_tree::tests::tree_tests::add_to_empty_tree ... ok
[INFO] [stdout] test binary_tree::tests::add_test_1 ... ok
[INFO] [stdout] test avl_tree::tests::tree_tests::remove_from_tree_success ... ok
[INFO] [stdout] test binary_tree::tests::add_test_4 ... ok
[INFO] [stdout] test avl_tree::tests::tree_tests::remove_from_tree_failure ... ok
[INFO] [stdout] test binary_tree::tests::add_test_3 ... ok
[INFO] [stdout] test heap::tests::initial_vector_heapify ... ok
[INFO] [stdout] test avl_tree::tests::tree_tests::tree_construction ... ok
[INFO] [stdout] test stack::tests::test_depth_many ... ok
[INFO] [stdout] test heap::tests::initial_vector_heapify_min_heap ... ok
[INFO] [stdout] test stack::tests::test_depth_empty ... ok
[INFO] [stdout] test heap::tests::pushing_multiple_should_get_smallest_from_pop ... ok
[INFO] [stdout] test avl_tree::tests::tree_tests::search_in_empty_tree ... ok
[INFO] [stdout] test heap::tests::empty_heap ... ok
[INFO] [stdout] test stack::tests::test_is_empty_false ... ok
[INFO] [stdout] test heap::tests::pushing_multiple_should_get_largest_from_pop ... ok
[INFO] [stdout] test binary_tree::tests::add_test_2 ... ok
[INFO] [stdout] test stack::tests::test_pop_multiple_items ... ok
[INFO] [stdout] test stack::tests::test_pop_one_item ... ok
[INFO] [stdout] test stack::tests::test_is_empty_true ... ok
[INFO] [stdout] test stack::tests::test_peek_items ... ok
[INFO] [stdout] test stack::tests::test_push_no_panic ... ok
[INFO] [stdout] test stack::tests::test_depth_one ... ok
[INFO] [stdout] test stack::tests::test_pop_empty ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::left_rotation_right_heavy_right_child_no_left_child ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::node_add_left ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_root_with_two_children ... ok
[INFO] [stdout] test avl_tree::tests::remove_tests::remove_root_with_two_children_left_heavy ... ok
[INFO] [stdout] test avl_tree::tests::search_for_item_in_tree ... ok
[INFO] [stdout] test stack::tests::test_peek_empty ... ok
[INFO] [stdout] test avl_tree::tests::add_tests::left_rotation_left_heavy_right_child ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 59 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests practice_collections
[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" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f", kill_on_drop: false }`
[INFO] [stdout] 35751e65fc1fd3471e0671efbb2e99bbc26beb217e6aab0124fc09e1dd26fa0f
