[INFO] cloning repository https://github.com/nnenn0/algo-lib-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nnenn0/algo-lib-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnnenn0%2Falgo-lib-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnnenn0%2Falgo-lib-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b55393f4976b16c6196e66bf444d896a0414b5ce
[INFO] checking nnenn0/algo-lib-rust against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnnenn0%2Falgo-lib-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/nnenn0/algo-lib-rust
[INFO] finished tweaking git repo https://github.com/nnenn0/algo-lib-rust
[INFO] tweaked toml for git repo https://github.com/nnenn0/algo-lib-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nnenn0/algo-lib-rust on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nnenn0/algo-lib-rust 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7857e28f4b948b0c973ad3cbb347e2b57a7cb81ab125ca6e70d7051a22771957
[INFO] running `Command { std: "docker" "start" "-a" "7857e28f4b948b0c973ad3cbb347e2b57a7cb81ab125ca6e70d7051a22771957", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7857e28f4b948b0c973ad3cbb347e2b57a7cb81ab125ca6e70d7051a22771957", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7857e28f4b948b0c973ad3cbb347e2b57a7cb81ab125ca6e70d7051a22771957", kill_on_drop: false }`
[INFO] [stdout] 7857e28f4b948b0c973ad3cbb347e2b57a7cb81ab125ca6e70d7051a22771957
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e08cc201d95127bd5705d4272b2f78c2715a792930dbe329afdd50728914be36
[INFO] running `Command { std: "docker" "start" "-a" "e08cc201d95127bd5705d4272b2f78c2715a792930dbe329afdd50728914be36", kill_on_drop: false }`
[INFO] [stderr]     Checking algo-lib-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `UnionFind` is never constructed
[INFO] [stdout]  --> src/data_structure/union_find.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct UnionFind {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `unite`, `is_same`, `get_root`, and `get_size` are never used
[INFO] [stdout]   --> src/data_structure/union_find.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl UnionFind {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 12 |     pub fn new(n: usize) -> UnionFind {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn unite(&mut self, mut x: usize, mut y: usize) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub fn is_same(&mut self, x: usize, y: usize) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn get_root(&mut self, x: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     pub fn get_size(&mut self, x: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_length_encode` is never used
[INFO] [stdout]  --> src/string/run_length_encode.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_length_encode(s: Vec<char>) -> Vec<(char, usize)> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_length_decode` is never used
[INFO] [stdout]   --> src/string/run_length_encode.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn run_length_decode(code: Vec<(char, usize)>) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "e08cc201d95127bd5705d4272b2f78c2715a792930dbe329afdd50728914be36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e08cc201d95127bd5705d4272b2f78c2715a792930dbe329afdd50728914be36", kill_on_drop: false }`
[INFO] [stdout] e08cc201d95127bd5705d4272b2f78c2715a792930dbe329afdd50728914be36