[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] 9b5c18cbca02779b9905613312ff88d72ecfa52d
[INFO] checking shakyShane/dsa against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[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 a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a78eb5b21cc16d921a71d086ea5a42aefe3e9b5fc95ae012e50d2919bbee6a36
[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" "a78eb5b21cc16d921a71d086ea5a42aefe3e9b5fc95ae012e50d2919bbee6a36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a78eb5b21cc16d921a71d086ea5a42aefe3e9b5fc95ae012e50d2919bbee6a36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a78eb5b21cc16d921a71d086ea5a42aefe3e9b5fc95ae012e50d2919bbee6a36", kill_on_drop: false }`
[INFO] [stdout] a78eb5b21cc16d921a71d086ea5a42aefe3e9b5fc95ae012e50d2919bbee6a36
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] a8a6ad0df32d1bb54d1140d81c6f01ab11d07c89c8f62aa8fce34f97a4f6a891
[INFO] running `Command { std: "docker" "start" "-a" "a8a6ad0df32d1bb54d1140d81c6f01ab11d07c89c8f62aa8fce34f97a4f6a891", kill_on_drop: false }`
[INFO] [stderr]     Checking dsa v0.1.0 (/opt/rustwide/workdir)
[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:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn binary_search(k: i32, items: &Vec<i32>) -> Option<i32> {
[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 Vec<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 Vec<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 Vec<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(value: impl Into<String>, left: Option<Box<Node>>, right: Option<Box<Node>>) -> Node {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]   --> src/serialize_tree.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     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:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Tree {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `deserialize`
[INFO] [stdout]   --> src/serialize_tree.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 51 |     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:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     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: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "a8a6ad0df32d1bb54d1140d81c6f01ab11d07c89c8f62aa8fce34f97a4f6a891", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8a6ad0df32d1bb54d1140d81c6f01ab11d07c89c8f62aa8fce34f97a4f6a891", kill_on_drop: false }`
[INFO] [stdout] a8a6ad0df32d1bb54d1140d81c6f01ab11d07c89c8f62aa8fce34f97a4f6a891