[INFO] fetching crate simple_calculator 0.1.5...
[INFO] checking simple_calculator-0.1.5 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate simple_calculator 0.1.5 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate simple_calculator 0.1.5 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 crates.io crate simple_calculator 0.1.5
[INFO] finished tweaking crates.io crate simple_calculator 0.1.5
[INFO] tweaked toml for crates.io crate simple_calculator 0.1.5 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f79270b6937a92f632b1c0c8d60bc33642d6eaeafcaa6d532d83210db276c100
[INFO] running `Command { std: "docker" "start" "-a" "f79270b6937a92f632b1c0c8d60bc33642d6eaeafcaa6d532d83210db276c100", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f79270b6937a92f632b1c0c8d60bc33642d6eaeafcaa6d532d83210db276c100", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f79270b6937a92f632b1c0c8d60bc33642d6eaeafcaa6d532d83210db276c100", kill_on_drop: false }`
[INFO] [stdout] f79270b6937a92f632b1c0c8d60bc33642d6eaeafcaa6d532d83210db276c100
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b9ce745f0329d8f9c6bb1c7dee4eb4a88a38e837f8a9c6656a0e8a5fee43a396
[INFO] running `Command { std: "docker" "start" "-a" "b9ce745f0329d8f9c6bb1c7dee4eb4a88a38e837f8a9c6656a0e8a5fee43a396", kill_on_drop: false }`
[INFO] [stderr]     Checking simple_calculator v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:25:16
[INFO] [stdout]    |
[INFO] [stdout] 25 |            for i in 1..y{
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:25:16
[INFO] [stdout]    |
[INFO] [stdout] 25 |            for i in 1..y{
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[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 0.30s
[INFO] running `Command { std: "docker" "inspect" "b9ce745f0329d8f9c6bb1c7dee4eb4a88a38e837f8a9c6656a0e8a5fee43a396", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9ce745f0329d8f9c6bb1c7dee4eb4a88a38e837f8a9c6656a0e8a5fee43a396", kill_on_drop: false }`
[INFO] [stdout] b9ce745f0329d8f9c6bb1c7dee4eb4a88a38e837f8a9c6656a0e8a5fee43a396