[INFO] cloning repository https://github.com/eklein09/ctci_rust_lesson1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eklein09/ctci_rust_lesson1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feklein09%2Fctci_rust_lesson1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feklein09%2Fctci_rust_lesson1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 25b85aa2949e43c42ca0f2c3d9ffd01ebb3e25c4
[INFO] checking eklein09/ctci_rust_lesson1 against try#8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346 for pr-86194
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feklein09%2Fctci_rust_lesson1" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/eklein09/ctci_rust_lesson1 on toolchain 8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/eklein09/ctci_rust_lesson1
[INFO] finished tweaking git repo https://github.com/eklein09/ctci_rust_lesson1
[INFO] tweaked toml for git repo https://github.com/eklein09/ctci_rust_lesson1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/eklein09/ctci_rust_lesson1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded counter v0.5.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b688c0db35192958bb15fe58173d5fb6bb74d78fd82991909413997fcb5ab755
[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" "b688c0db35192958bb15fe58173d5fb6bb74d78fd82991909413997fcb5ab755", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b688c0db35192958bb15fe58173d5fb6bb74d78fd82991909413997fcb5ab755", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b688c0db35192958bb15fe58173d5fb6bb74d78fd82991909413997fcb5ab755", kill_on_drop: false }`
[INFO] [stdout] b688c0db35192958bb15fe58173d5fb6bb74d78fd82991909413997fcb5ab755
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 590fad2a4d151db15a3351eb88a73842828ee14bab1ab9d2e41c54f097a3c9bc
[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" "590fad2a4d151db15a3351eb88a73842828ee14bab1ab9d2e41c54f097a3c9bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking counter v0.5.2
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking lesson1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `string_compression`
[INFO] [stdout]  --> src/compression.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn string_compression(s: &str) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `urlify`
[INFO] [stdout]  --> src/urlify.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn urlify(a: &str) -> String {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `common_prefix`
[INFO] [stdout]  --> src/common_prefix.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn common_prefix(a: String, b: String) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_common_prefix`
[INFO] [stdout]   --> src/common_prefix.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_unique`
[INFO] [stdout]   --> src/main.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn is_unique(s: &str) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_anagram`
[INFO] [stdout]   --> src/main.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn is_anagram(a: &str, b: &str) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.53s
[INFO] running `Command { std: "docker" "inspect" "590fad2a4d151db15a3351eb88a73842828ee14bab1ab9d2e41c54f097a3c9bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "590fad2a4d151db15a3351eb88a73842828ee14bab1ab9d2e41c54f097a3c9bc", kill_on_drop: false }`
[INFO] [stdout] 590fad2a4d151db15a3351eb88a73842828ee14bab1ab9d2e41c54f097a3c9bc