[INFO] cloning repository https://github.com/shakyShane/dsa
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shakyShane/dsa" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FshakyShane%2Fdsa", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FshakyShane%2Fdsa'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5c07fb0b3d517b77b86a54aa792c2fad77f99c7e
[INFO] checking shakyShane/dsa against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FshakyShane%2Fdsa" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shakyShane/dsa on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shakyShane/dsa
[INFO] finished tweaking git repo https://github.com/shakyShane/dsa
[INFO] tweaked toml for git repo https://github.com/shakyShane/dsa written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/shakyShane/dsa already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5103fe40b7d18320d7eddde40da228d5db365be387176f1fdc24766478235ee0
[INFO] running `Command { std: "docker" "start" "-a" "5103fe40b7d18320d7eddde40da228d5db365be387176f1fdc24766478235ee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5103fe40b7d18320d7eddde40da228d5db365be387176f1fdc24766478235ee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5103fe40b7d18320d7eddde40da228d5db365be387176f1fdc24766478235ee0", kill_on_drop: false }`
[INFO] [stdout] 5103fe40b7d18320d7eddde40da228d5db365be387176f1fdc24766478235ee0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04a1eca2e92b9a2ddacb03effaf0922d6f14eacf3476d15ddd20018c8249d563
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "04a1eca2e92b9a2ddacb03effaf0922d6f14eacf3476d15ddd20018c8249d563", kill_on_drop: false }`
[INFO] [stderr]     Checking dsa v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::cmp::Ordering`
[INFO] [stdout]  --> src/coins.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::Ordering;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ordering`
[INFO] [stdout]  --> src/coins.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::Ordering;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `balanced_recursive`
[INFO] [stdout]  --> src/balanced_recursive.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn balanced_recursive(input: &str) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `expect`
[INFO] [stdout]  --> src/balanced_recursive.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn expect(end: Option<char>, input: &mut Chars) -> bool {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `balanced`
[INFO] [stdout]  --> src/balanced_stack.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn balanced(input: &str) -> bool {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `binary_search`
[INFO] [stdout]   --> src/binary_search.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn binary_search(k: i32, items: &[i32]) -> Option<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `count_matrix`
[INFO] [stdout]  --> src/coins.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn count_matrix(matrix: &[Vec<usize>]) -> usize {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `coins`
[INFO] [stdout]  --> src/coins.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn coins(m: usize, n: usize, matrix: &[Vec<usize>]) -> usize {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `quicksort`
[INFO] [stdout]  --> src/quick_sort_1.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn quicksort(a: &mut [usize], lo: usize, hi: usize) {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `partition`
[INFO] [stdout]   --> src/quick_sort_1.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn partition(a: &mut [usize], lo: usize, hi: usize) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `swap`
[INFO] [stdout]   --> src/quick_sort_1.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn swap(a: &mut [usize], lo: usize, hi: usize) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/serialize_tree.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn new(
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]   --> src/serialize_tree.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn serialize(root: &Option<Box<Node>>) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Tree`
[INFO] [stdout]   --> src/serialize_tree.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct Tree {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `deserialize`
[INFO] [stdout]   --> src/serialize_tree.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn deserialize(&mut self) -> Option<Box<Node>> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/serialize_tree.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn from_str(input: impl Into<String>) -> Tree {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/unival_subtrees.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn new(value: impl Into<String>, left: Option<Box<Node>>, right: Option<Box<Node>>) -> Node {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `count_unival_subtrees`
[INFO] [stdout]   --> src/unival_subtrees.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn count_unival_subtrees(root: &Option<Box<Node>>) -> (usize, bool) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `count_matrix`
[INFO] [stdout]  --> src/coins.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn count_matrix(matrix: &[Vec<usize>]) -> usize {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "04a1eca2e92b9a2ddacb03effaf0922d6f14eacf3476d15ddd20018c8249d563", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04a1eca2e92b9a2ddacb03effaf0922d6f14eacf3476d15ddd20018c8249d563", kill_on_drop: false }`
[INFO] [stdout] 04a1eca2e92b9a2ddacb03effaf0922d6f14eacf3476d15ddd20018c8249d563