[INFO] cloning repository https://github.com/Mec-iS/rust-algos-illuminated
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Mec-iS/rust-algos-illuminated" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMec-iS%2Frust-algos-illuminated", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMec-iS%2Frust-algos-illuminated'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e9b7e2a77cfe1d878f4b30043b1e25a1561476db
[INFO] testing Mec-iS/rust-algos-illuminated against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMec-iS%2Frust-algos-illuminated" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Mec-iS/rust-algos-illuminated on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Mec-iS/rust-algos-illuminated
[INFO] finished tweaking git repo https://github.com/Mec-iS/rust-algos-illuminated
[INFO] tweaked toml for git repo https://github.com/Mec-iS/rust-algos-illuminated written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Mec-iS/rust-algos-illuminated already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "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] cea5b90ced814653ee61f01f6da127f1bbbcb73d246d31155abc3fa080e6c41f
[INFO] running `Command { std: "docker" "start" "-a" "cea5b90ced814653ee61f01f6da127f1bbbcb73d246d31155abc3fa080e6c41f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cea5b90ced814653ee61f01f6da127f1bbbcb73d246d31155abc3fa080e6c41f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cea5b90ced814653ee61f01f6da127f1bbbcb73d246d31155abc3fa080e6c41f", kill_on_drop: false }`
[INFO] [stdout] cea5b90ced814653ee61f01f6da127f1bbbcb73d246d31155abc3fa080e6c41f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--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] a0278a7e1604a32399822c4dc155f13fc048d8b488635932a5bdbb658e47ab47
[INFO] running `Command { std: "docker" "start" "-a" "a0278a7e1604a32399822c4dc155f13fc048d8b488635932a5bdbb658e47ab47", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-algos-illuminated v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Queue`
[INFO] [stdout]  --> src/other/mod.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Queue {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/other/mod.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn push(&mut self, element: char) -> () {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_raw`
[INFO] [stdout]   --> src/other/mod.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn pop_raw(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_swap`
[INFO] [stdout]   --> src/other/mod.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn pop_swap(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `split`
[INFO] [stdout]   --> src/other/mod.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn split(self) -> (Vec<char>, Vec<char>) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/other/mod.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn new() -> Queue {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-algos-illuminated`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "a0278a7e1604a32399822c4dc155f13fc048d8b488635932a5bdbb658e47ab47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0278a7e1604a32399822c4dc155f13fc048d8b488635932a5bdbb658e47ab47", kill_on_drop: false }`
[INFO] [stdout] a0278a7e1604a32399822c4dc155f13fc048d8b488635932a5bdbb658e47ab47