[INFO] cloning repository https://github.com/tortechnocom/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tortechnocom/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftortechnocom%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftortechnocom%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] afd0bb399466ab34fb3213921266d97202ac8a76
[INFO] checking tortechnocom/rust_learning against master#a9e7b30487235621751cc628f170c0f15fb215c4 for pr-136539
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftortechnocom%2Frust_learning" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tortechnocom/rust_learning on toolchain a9e7b30487235621751cc628f170c0f15fb215c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a9e7b30487235621751cc628f170c0f15fb215c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tortechnocom/rust_learning
[INFO] finished tweaking git repo https://github.com/tortechnocom/rust_learning
[INFO] tweaked toml for git repo https://github.com/tortechnocom/rust_learning written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tortechnocom/rust_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" "+a9e7b30487235621751cc628f170c0f15fb215c4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a9e7b30487235621751cc628f170c0f15fb215c4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 18fab824b9c7c4f927ea73bcb058dc3dd046363f4ba9d5710bc2139b04379876
[INFO] running `Command { std: "docker" "start" "-a" "18fab824b9c7c4f927ea73bcb058dc3dd046363f4ba9d5710bc2139b04379876", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18fab824b9c7c4f927ea73bcb058dc3dd046363f4ba9d5710bc2139b04379876", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18fab824b9c7c4f927ea73bcb058dc3dd046363f4ba9d5710bc2139b04379876", kill_on_drop: false }`
[INFO] [stdout] 18fab824b9c7c4f927ea73bcb058dc3dd046363f4ba9d5710bc2139b04379876
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a9e7b30487235621751cc628f170c0f15fb215c4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 958c4f1c2c1789d8d0694d67a5dedcae35f2cc74796da032b541c8573bc10bca
[INFO] running `Command { std: "docker" "start" "-a" "958c4f1c2c1789d8d0694d67a5dedcae35f2cc74796da032b541c8573bc10bca", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let y = 5;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let y = 5;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "958c4f1c2c1789d8d0694d67a5dedcae35f2cc74796da032b541c8573bc10bca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "958c4f1c2c1789d8d0694d67a5dedcae35f2cc74796da032b541c8573bc10bca", kill_on_drop: false }`
[INFO] [stdout] 958c4f1c2c1789d8d0694d67a5dedcae35f2cc74796da032b541c8573bc10bca