[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] checking bashhack/grokking_algos against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbashhack%2Fgrokking_algos" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bashhack/grokking_algos on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "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-4-tc1/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c419cf6f506bba51cd099ec608534f908e447fda3533d887f8201511bd2174a
[INFO] running `Command { std: "docker" "start" "-a" "7c419cf6f506bba51cd099ec608534f908e447fda3533d887f8201511bd2174a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c419cf6f506bba51cd099ec608534f908e447fda3533d887f8201511bd2174a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c419cf6f506bba51cd099ec608534f908e447fda3533d887f8201511bd2174a", kill_on_drop: false }`
[INFO] [stdout] 7c419cf6f506bba51cd099ec608534f908e447fda3533d887f8201511bd2174a
[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=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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd3b4513954fa3779bdecc4c5f7907cd05498402c3ea6c03756344944ffc0f4d
[INFO] running `Command { std: "docker" "start" "-a" "cd3b4513954fa3779bdecc4c5f7907cd05498402c3ea6c03756344944ffc0f4d", kill_on_drop: false }`
[INFO] [stderr]     Checking grokking_algos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `linear_search` is never used
[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 `iterative_binary_search` is never used
[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 `recursive_binary_search` is never used
[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 `sum` is never used
[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 `count` is never used
[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 `find_max` is never used
[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 `quick_sort` is never used
[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 `simple_recursive_countdown` is never used
[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 `greeter` is never used
[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 `second_greeter` is never used
[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 `bye` is never used
[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 `factorial` is never used
[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 `selection_sort` is never used
[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` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "cd3b4513954fa3779bdecc4c5f7907cd05498402c3ea6c03756344944ffc0f4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd3b4513954fa3779bdecc4c5f7907cd05498402c3ea6c03756344944ffc0f4d", kill_on_drop: false }`
[INFO] [stdout] cd3b4513954fa3779bdecc4c5f7907cd05498402c3ea6c03756344944ffc0f4d
[INFO] checking bashhack/grokking_algos against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbashhack%2Fgrokking_algos" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bashhack/grokking_algos on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "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-4-tc2/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 124ea489f2a1ff12f46949b1e9f4265f46a5eb888010f924ab35706db77c5c6e
[INFO] running `Command { std: "docker" "start" "-a" "124ea489f2a1ff12f46949b1e9f4265f46a5eb888010f924ab35706db77c5c6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "124ea489f2a1ff12f46949b1e9f4265f46a5eb888010f924ab35706db77c5c6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "124ea489f2a1ff12f46949b1e9f4265f46a5eb888010f924ab35706db77c5c6e", kill_on_drop: false }`
[INFO] [stdout] 124ea489f2a1ff12f46949b1e9f4265f46a5eb888010f924ab35706db77c5c6e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9a8c505ae1a0e64a7caa82acc604032a9be9db3265ecd1235384962d7332c9a
[INFO] running `Command { std: "docker" "start" "-a" "c9a8c505ae1a0e64a7caa82acc604032a9be9db3265ecd1235384962d7332c9a", kill_on_drop: false }`
[INFO] [stderr]     Checking grokking_algos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `linear_search` is never used
[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 `iterative_binary_search` is never used
[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 `recursive_binary_search` is never used
[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 `sum` is never used
[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 `count` is never used
[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 `find_max` is never used
[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 `quick_sort` is never used
[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 `simple_recursive_countdown` is never used
[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 `greeter` is never used
[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 `second_greeter` is never used
[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 `bye` is never used
[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 `factorial` is never used
[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 `selection_sort` is never used
[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` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "c9a8c505ae1a0e64a7caa82acc604032a9be9db3265ecd1235384962d7332c9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9a8c505ae1a0e64a7caa82acc604032a9be9db3265ecd1235384962d7332c9a", kill_on_drop: false }`
[INFO] [stdout] c9a8c505ae1a0e64a7caa82acc604032a9be9db3265ecd1235384962d7332c9a