[INFO] cloning repository https://github.com/EdsonMello-code/Exercises_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EdsonMello-code/Exercises_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdsonMello-code%2FExercises_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdsonMello-code%2FExercises_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b51b62c0740697932f14b2a06efe6ab8569d30c9
[INFO] checking EdsonMello-code/Exercises_rust against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdsonMello-code%2FExercises_rust" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EdsonMello-code/Exercises_rust on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/EdsonMello-code/Exercises_rust
[INFO] finished tweaking git repo https://github.com/EdsonMello-code/Exercises_rust
[INFO] tweaked toml for git repo https://github.com/EdsonMello-code/Exercises_rust written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/EdsonMello-code/Exercises_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 99582a2b9252bb29d7507fc3aa26fbd04504732ee3499b71e4bac69eca228951
[INFO] running `Command { std: "docker" "start" "-a" "99582a2b9252bb29d7507fc3aa26fbd04504732ee3499b71e4bac69eca228951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99582a2b9252bb29d7507fc3aa26fbd04504732ee3499b71e4bac69eca228951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99582a2b9252bb29d7507fc3aa26fbd04504732ee3499b71e4bac69eca228951", kill_on_drop: false }`
[INFO] [stdout] 99582a2b9252bb29d7507fc3aa26fbd04504732ee3499b71e4bac69eca228951
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f50cde6e2591ed9f8b54d8bcd760d4a8504311d56056d63c54aca4b9b7fd1f0
[INFO] running `Command { std: "docker" "start" "-a" "8f50cde6e2591ed9f8b54d8bcd760d4a8504311d56056d63c54aca4b9b7fd1f0", kill_on_drop: false }`
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `response` is never read
[INFO] [stdout]   --> src/main.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut response: &str = "";
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `response` is never read
[INFO] [stdout]   --> src/main.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut response: &str = "";
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "8f50cde6e2591ed9f8b54d8bcd760d4a8504311d56056d63c54aca4b9b7fd1f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f50cde6e2591ed9f8b54d8bcd760d4a8504311d56056d63c54aca4b9b7fd1f0", kill_on_drop: false }`
[INFO] [stdout] 8f50cde6e2591ed9f8b54d8bcd760d4a8504311d56056d63c54aca4b9b7fd1f0