[INFO] cloning repository https://github.com/bashhack/grokking_algos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bashhack/grokking_algos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbashhack%2Fgrokking_algos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbashhack%2Fgrokking_algos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fdf7b8b8fdcf9ada507d3c0d4e54e162580deb4a
[INFO] testing bashhack/grokking_algos against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbashhack%2Fgrokking_algos" "/workspace/builds/worker-23/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-23/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bashhack/grokking_algos on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bashhack/grokking_algos
[INFO] finished tweaking git repo https://github.com/bashhack/grokking_algos
[INFO] tweaked toml for git repo https://github.com/bashhack/grokking_algos written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate git repo https://github.com/bashhack/grokking_algos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5550e63e51959438abd132a0426c92cf9a639c0ff9af61ee4cf72807e639c1b5
[INFO] running `Command { std: "docker" "start" "-a" "5550e63e51959438abd132a0426c92cf9a639c0ff9af61ee4cf72807e639c1b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5550e63e51959438abd132a0426c92cf9a639c0ff9af61ee4cf72807e639c1b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5550e63e51959438abd132a0426c92cf9a639c0ff9af61ee4cf72807e639c1b5", kill_on_drop: false }`
[INFO] [stdout] 5550e63e51959438abd132a0426c92cf9a639c0ff9af61ee4cf72807e639c1b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dabe6468d1942ab68ff657180a7ec38211a7191ee94089eab9787632c5dc3a3f
[INFO] running `Command { std: "docker" "start" "-a" "dabe6468d1942ab68ff657180a7ec38211a7191ee94089eab9787632c5dc3a3f", kill_on_drop: false }`
[INFO] [stderr]    Compiling grokking_algos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `linear_search`
[INFO] [stdout]    --> src/intro_to_algos/mod.rs:159:8
[INFO] [stdout]     |
[INFO] [stdout] 159 | pub fn linear_search<T: Ord + std::fmt::Debug>(list: &[T], item: T) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `iterative_binary_search`
[INFO] [stdout]    --> src/intro_to_algos/mod.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 | pub fn iterative_binary_search<T: Ord + std::fmt::Debug>(list: &[T], item: T) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `recursive_binary_search`
[INFO] [stdout]    --> src/intro_to_algos/mod.rs:235:8
[INFO] [stdout]     |
[INFO] [stdout] 235 | pub fn recursive_binary_search<T: Ord + std::fmt::Debug>(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sum`
[INFO] [stdout]    --> src/quicksort/mod.rs:218:8
[INFO] [stdout]     |
[INFO] [stdout] 218 | pub fn sum(list: &[u64]) -> u64 {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `count`
[INFO] [stdout]    --> src/quicksort/mod.rs:241:8
[INFO] [stdout]     |
[INFO] [stdout] 241 | pub fn count<T: std::fmt::Debug>(list: &[T]) -> u64 {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `find_max`
[INFO] [stdout]    --> src/quicksort/mod.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 298 | pub fn find_max<T: Ord + Copy>(list: &[T]) -> Option<&T> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quick_sort`
[INFO] [stdout]    --> src/quicksort/mod.rs:320:8
[INFO] [stdout]     |
[INFO] [stdout] 320 | pub fn quick_sort<T, E>(mut list: T) -> Vec<E>
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `simple_recursive_countdown`
[INFO] [stdout]    --> src/recursion/mod.rs:150:8
[INFO] [stdout]     |
[INFO] [stdout] 150 | pub fn simple_recursive_countdown(i: i32) -> i32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `greeter`
[INFO] [stdout]    --> src/recursion/mod.rs:212:8
[INFO] [stdout]     |
[INFO] [stdout] 212 | pub fn greeter(name: &str) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `second_greeter`
[INFO] [stdout]    --> src/recursion/mod.rs:220:4
[INFO] [stdout]     |
[INFO] [stdout] 220 | fn second_greeter(name: &str) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bye`
[INFO] [stdout]    --> src/recursion/mod.rs:225:4
[INFO] [stdout]     |
[INFO] [stdout] 225 | fn bye() {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `factorial`
[INFO] [stdout]    --> src/recursion/mod.rs:244:8
[INFO] [stdout]     |
[INFO] [stdout] 244 | pub fn factorial(i: u64) -> u64 {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `selection_sort`
[INFO] [stdout]    --> src/selection_sort/mod.rs:261:8
[INFO] [stdout]     |
[INFO] [stdout] 261 | pub fn selection_sort<T: Ord>(list: &mut [T]) -> &mut [T] {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "dabe6468d1942ab68ff657180a7ec38211a7191ee94089eab9787632c5dc3a3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dabe6468d1942ab68ff657180a7ec38211a7191ee94089eab9787632c5dc3a3f", kill_on_drop: false }`
[INFO] [stdout] dabe6468d1942ab68ff657180a7ec38211a7191ee94089eab9787632c5dc3a3f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc0c0797055248c3bea729e8fd30b42ad6573d5684cd47f16f232d90ce30b9f6
[INFO] running `Command { std: "docker" "start" "-a" "fc0c0797055248c3bea729e8fd30b42ad6573d5684cd47f16f232d90ce30b9f6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling grokking_algos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "fc0c0797055248c3bea729e8fd30b42ad6573d5684cd47f16f232d90ce30b9f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc0c0797055248c3bea729e8fd30b42ad6573d5684cd47f16f232d90ce30b9f6", kill_on_drop: false }`
[INFO] [stdout] fc0c0797055248c3bea729e8fd30b42ad6573d5684cd47f16f232d90ce30b9f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 16073b683b137857d6a13a18483e8be6eae18fdeaf399bce0e613b3bdd269621
[INFO] running `Command { std: "docker" "start" "-a" "16073b683b137857d6a13a18483e8be6eae18fdeaf399bce0e613b3bdd269621", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.96s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/grokking_algos-2f6bdd98e2513593)
[INFO] [stdout] 
[INFO] [stdout] running 42 tests
[INFO] [stdout] test intro_to_algos::tests::iterative_binary_search_returns_index_at_vector_end ... ok
[INFO] [stdout] test intro_to_algos::tests::iterative_binary_search_returns_none_if_element_not_found ... ok
[INFO] [stdout] test intro_to_algos::tests::iterative_binary_search_returns_index_at_vector_start ... ok
[INFO] [stdout] test intro_to_algos::tests::iterative_binary_search_returns_none_if_empty_vector ... ok
[INFO] [stdout] test intro_to_algos::tests::linear_search_returns_index_at_vector_end ... ok
[INFO] [stdout] test intro_to_algos::tests::linear_search_returns_index_at_vector_start ... ok
[INFO] [stdout] test intro_to_algos::tests::linear_search_returns_none_if_element_not_found ... ok
[INFO] [stdout] test intro_to_algos::tests::linear_search_returns_none_if_empty_vector ... ok
[INFO] [stdout] test intro_to_algos::tests::recursive_binary_search_returns_index_at_vector_end ... ok
[INFO] [stdout] test intro_to_algos::tests::recursive_binary_search_returns_index_at_vector_start ... ok
[INFO] [stdout] test intro_to_algos::tests::recursive_binary_search_returns_none_if_element_not_found ... ok
[INFO] [stdout] test intro_to_algos::tests::recursive_binary_search_returns_none_if_empty_vector ... ok
[INFO] [stdout] test quicksort::tests::count_of_empty_list_returns_zero ... ok
[INFO] [stdout] test quicksort::tests::count_of_non_empty_list_returns_non_zero_count_value ... ok
[INFO] [stdout] test quicksort::tests::count_of_non_empty_list_returns_value_equal_to_builtin_len ... ok
[INFO] [stdout] test quicksort::tests::max_of_empty_list_returns_none ... ok
[INFO] [stdout] test quicksort::tests::max_of_empty_list_returns_value_equal_to_builtin_max ... ok
[INFO] [stdout] test quicksort::tests::max_of_list_returns_expected_value ... ok
[INFO] [stdout] test quicksort::tests::max_of_list_returns_value_equal_to_builtin_max ... ok
[INFO] [stdout] test quicksort::tests::max_of_list_with_negative_values_returns_expected_value ... ok
[INFO] [stdout] test quicksort::tests::max_of_list_with_single_value_returns_expected_value ... ok
[INFO] [stdout] test quicksort::tests::quick_sort_of_empty_list ... ok
[INFO] [stdout] test quicksort::tests::quick_sort_of_four_element_list ... ok
[INFO] [stdout] test quicksort::tests::quick_sort_of_four_element_list_with_negative_values ... ok
[INFO] [stdout] test quicksort::tests::quick_sort_of_four_element_list_with_str_values ... ok
[INFO] [stdout] test quicksort::tests::quick_sort_of_one_element_list ... ok
[INFO] [stdout] test quicksort::tests::quick_sort_of_repeated_values ... ok
[INFO] [stdout] test quicksort::tests::sum_of_empty_list_returns_zero ... ok
[INFO] [stdout] test quicksort::tests::sum_of_non_empty_list_returns_non_zero_sum_value ... ok
[INFO] [stdout] test recursion::tests::find_factorial_for_zero ... ok
[INFO] [stdout] test quicksort::tests::sum_of_non_empty_list_returns_value_equal_to_builtin_sum ... ok
[INFO] [stdout] test recursion::tests::finds_factorial_for_input ... ok
[INFO] [stdout] test recursion::tests::finds_factorial_for_max_input ... ok
[INFO] [stdout] test recursion::tests::finds_factorial_for_one ... ok
[INFO] [stdout] test recursion::tests::greets ... ok
[INFO] [stdout] test recursion::tests::resolves_to_zero_for_positive_input ... ok
[INFO] [stdout] test selection_sort::tests::selection_sort_correctly_sort_unordered_list ... ok
[INFO] [stdout] test selection_sort::tests::selection_sort_handles_repeating_values ... ok
[INFO] [stdout] test recursion::tests::resolves_to_original_input_for_negative_input ... ok
[INFO] [stdout] test selection_sort::tests::selection_sort_returns_existing_ordered_list ... ok
[INFO] [stdout] test selection_sort::tests::selection_sort_returns_none_if_provided_empty_list ... ok
[INFO] [stdout] test selection_sort::tests::selection_sort_works_over_list_of_strings ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 42 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "16073b683b137857d6a13a18483e8be6eae18fdeaf399bce0e613b3bdd269621", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16073b683b137857d6a13a18483e8be6eae18fdeaf399bce0e613b3bdd269621", kill_on_drop: false }`
[INFO] [stdout] 16073b683b137857d6a13a18483e8be6eae18fdeaf399bce0e613b3bdd269621