[INFO] cloning repository https://github.com/kumarUjjawal/rust_algorithms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kumarUjjawal/rust_algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkumarUjjawal%2Frust_algorithms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkumarUjjawal%2Frust_algorithms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eb32bf3a639e2dcf72ca2df465aeaef8dc741aec
[INFO] checking kumarUjjawal/rust_algorithms against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkumarUjjawal%2Frust_algorithms" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kumarUjjawal/rust_algorithms
[INFO] finished tweaking git repo https://github.com/kumarUjjawal/rust_algorithms
[INFO] tweaked toml for git repo https://github.com/kumarUjjawal/rust_algorithms written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kumarUjjawal/rust_algorithms on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kumarUjjawal/rust_algorithms 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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking kumarUjjawal/rust_algorithms against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkumarUjjawal%2Frust_algorithms" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kumarUjjawal/rust_algorithms
[INFO] finished tweaking git repo https://github.com/kumarUjjawal/rust_algorithms
[INFO] tweaked toml for git repo https://github.com/kumarUjjawal/rust_algorithms written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kumarUjjawal/rust_algorithms on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kumarUjjawal/rust_algorithms 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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0bf0a0518a4062509fa3d73391cff4d50e42ac27b126ec4af51266ef128e6193
[INFO] running `Command { std: "docker" "start" "-a" "0bf0a0518a4062509fa3d73391cff4d50e42ac27b126ec4af51266ef128e6193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0bf0a0518a4062509fa3d73391cff4d50e42ac27b126ec4af51266ef128e6193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bf0a0518a4062509fa3d73391cff4d50e42ac27b126ec4af51266ef128e6193", kill_on_drop: false }`
[INFO] [stdout] 0bf0a0518a4062509fa3d73391cff4d50e42ac27b126ec4af51266ef128e6193
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a4be1331850360d733071fdad9449e48f6b9fc899fcddae5e27cc61be68c68d
[INFO] running `Command { std: "docker" "start" "-a" "7a4be1331850360d733071fdad9449e48f6b9fc899fcddae5e27cc61be68c68d", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `binary_search` is never used
[INFO] [stdout]  --> src/algorithms/binary_search.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn binary_search(arr: Vec<i32>, key: i32) -> Option<i32> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bubble_sort` is never used
[INFO] [stdout]  --> src/algorithms/bubble_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bubble_sort(arr: &mut Vec<i32>) {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insertion_sort` is never used
[INFO] [stdout]  --> src/algorithms/insertion_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn insertion_sort(arr: &mut Vec<i32>) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `linear_search` is never used
[INFO] [stdout]  --> src/algorithms/linear_search.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn linear_search(arr: Vec<i32>, key: i32) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `merge` is never used
[INFO] [stdout]  --> src/algorithms/merge_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn merge(arr: &mut Vec<i32>, left: usize, mid: usize, right: usize) {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `merge_sort` is never used
[INFO] [stdout]   --> src/algorithms/merge_sort.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn merge_sort(arr: &mut Vec<i32>, left: usize, right: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `selection_sort` is never used
[INFO] [stdout]  --> src/algorithms/selection_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn selection_sort(arr: &mut Vec<i32>) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LRUCache` is never constructed
[INFO] [stdout]  --> src/data_structures/lru_cache.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct LRUCache<K, V> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, and `put` are never used
[INFO] [stdout]   --> src/data_structures/lru_cache.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl<K: std::hash::Hash + Eq + Clone, V> LRUCache<K, V> {
[INFO] [stdout]    | ------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 10 |     fn new(capacity: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn get(&mut self, key: &K) -> Option<&V> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn put(&mut self, key: K, value: V) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "7a4be1331850360d733071fdad9449e48f6b9fc899fcddae5e27cc61be68c68d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a4be1331850360d733071fdad9449e48f6b9fc899fcddae5e27cc61be68c68d", kill_on_drop: false }`
[INFO] [stdout] 7a4be1331850360d733071fdad9449e48f6b9fc899fcddae5e27cc61be68c68d