[INFO] cloning repository https://github.com/sollambert/codewars
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sollambert/codewars" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsollambert%2Fcodewars", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsollambert%2Fcodewars'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c9775f2641f856126130ea2478047f858ee46ba3
[INFO] checking sollambert/codewars against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsollambert%2Fcodewars" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sollambert/codewars
[INFO] finished tweaking git repo https://github.com/sollambert/codewars
[INFO] tweaked toml for git repo https://github.com/sollambert/codewars written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sollambert/codewars on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sollambert/codewars 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 62b00bf8cba279972d8e6c514e54c3b1a2b006670d11fe5c095fc14684801de4
[INFO] running `Command { std: "docker" "start" "-a" "62b00bf8cba279972d8e6c514e54c3b1a2b006670d11fe5c095fc14684801de4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "62b00bf8cba279972d8e6c514e54c3b1a2b006670d11fe5c095fc14684801de4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62b00bf8cba279972d8e6c514e54c3b1a2b006670d11fe5c095fc14684801de4", kill_on_drop: false }`
[INFO] [stdout] 62b00bf8cba279972d8e6c514e54c3b1a2b006670d11fe5c095fc14684801de4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf29bf4725fb1c7d5fbcbd41375c9ce70e70a647f285081d0644d46a0ec6ac90
[INFO] running `Command { std: "docker" "start" "-a" "bf29bf4725fb1c7d5fbcbd41375c9ce70e70a647f285081d0644d46a0ec6ac90", kill_on_drop: false }`
[INFO] [stderr]     Checking codewars v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]  --> src/sort_bindary_tree_by_levels.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn tree_by_levels(root: &Node) -> Vec<u32> {
[INFO] [stdout]   |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/sort_bindary_tree_by_levels.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tree_by_levels` is never used
[INFO] [stdout]  --> src/sort_bindary_tree_by_levels.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn tree_by_levels(root: &Node) -> Vec<u32> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tests` is never used
[INFO] [stdout]  --> src/recover_secret.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn tests() {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Singlet` is never constructed
[INFO] [stdout]   --> src/recover_secret.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Singlet {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recover_secret` is never used
[INFO] [stdout]   --> src/recover_secret.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn recover_secret(triplets: Vec<[char; 3]>) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]  --> src/sort_bindary_tree_by_levels.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn tree_by_levels(root: &Node) -> Vec<u32> {
[INFO] [stdout]   |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/sort_bindary_tree_by_levels.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tree_by_levels` is never used
[INFO] [stdout]  --> src/sort_bindary_tree_by_levels.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn tree_by_levels(root: &Node) -> Vec<u32> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tests` is never used
[INFO] [stdout]  --> src/recover_secret.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn tests() {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Singlet` is never constructed
[INFO] [stdout]   --> src/recover_secret.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Singlet {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recover_secret` is never used
[INFO] [stdout]   --> src/recover_secret.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn recover_secret(triplets: Vec<[char; 3]>) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "bf29bf4725fb1c7d5fbcbd41375c9ce70e70a647f285081d0644d46a0ec6ac90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf29bf4725fb1c7d5fbcbd41375c9ce70e70a647f285081d0644d46a0ec6ac90", kill_on_drop: false }`
[INFO] [stdout] bf29bf4725fb1c7d5fbcbd41375c9ce70e70a647f285081d0644d46a0ec6ac90