[INFO] cloning repository https://github.com/Malikazz/rust-algo-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Malikazz/rust-algo-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMalikazz%2Frust-algo-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMalikazz%2Frust-algo-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dcea141758e9793203c2864b22d22466cacba426
[INFO] checking Malikazz/rust-algo-learning against try#d83b14207998f47b18a34e930157ac0d7c18b16e for pr-149137
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMalikazz%2Frust-algo-learning" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Malikazz/rust-algo-learning
[INFO] finished tweaking git repo https://github.com/Malikazz/rust-algo-learning
[INFO] tweaked toml for git repo https://github.com/Malikazz/rust-algo-learning written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Malikazz/rust-algo-learning on toolchain d83b14207998f47b18a34e930157ac0d7c18b16e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Malikazz/rust-algo-learning 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" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42390c83e576052c3dc183fdf5a0cea6d245d2a8b7241967910b166b1103d34e
[INFO] running `Command { std: "docker" "start" "-a" "42390c83e576052c3dc183fdf5a0cea6d245d2a8b7241967910b166b1103d34e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42390c83e576052c3dc183fdf5a0cea6d245d2a8b7241967910b166b1103d34e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42390c83e576052c3dc183fdf5a0cea6d245d2a8b7241967910b166b1103d34e", kill_on_drop: false }`
[INFO] [stdout] 42390c83e576052c3dc183fdf5a0cea6d245d2a8b7241967910b166b1103d34e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+d83b14207998f47b18a34e930157ac0d7c18b16e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34231e97513ac6d414f7024bf2578de942f0d1553625ff0c8d00ac5c4b04674a
[INFO] running `Command { std: "docker" "start" "-a" "34231e97513ac6d414f7024bf2578de942f0d1553625ff0c8d00ac5c4b04674a", kill_on_drop: false }`
[INFO] [stderr]     Checking algo_testing v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/valid_anagram.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn is_anagram(mut s: String, mut t: String) -> bool {
[INFO] [stdout]   |                   ----^
[INFO] [stdout]   |                   |
[INFO] [stdout]   |                   help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/valid_anagram.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn is_anagram(mut s: String, mut t: String) -> bool {
[INFO] [stdout]   |                   ----^
[INFO] [stdout]   |                   |
[INFO] [stdout]   |                   help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "34231e97513ac6d414f7024bf2578de942f0d1553625ff0c8d00ac5c4b04674a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34231e97513ac6d414f7024bf2578de942f0d1553625ff0c8d00ac5c4b04674a", kill_on_drop: false }`
[INFO] [stdout] 34231e97513ac6d414f7024bf2578de942f0d1553625ff0c8d00ac5c4b04674a