[INFO] cloning repository https://github.com/saurabhghatnekar/Rust101
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/saurabhghatnekar/Rust101" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaurabhghatnekar%2FRust101", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaurabhghatnekar%2FRust101'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3e6b3cdb8b21a25c0fe594d16e7283b47caf0c89
[INFO] checking saurabhghatnekar/Rust101 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124305
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaurabhghatnekar%2FRust101" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/saurabhghatnekar/Rust101 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/saurabhghatnekar/Rust101
[INFO] finished tweaking git repo https://github.com/saurabhghatnekar/Rust101
[INFO] tweaked toml for git repo https://github.com/saurabhghatnekar/Rust101 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/saurabhghatnekar/Rust101 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" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking saurabhghatnekar/Rust101 against try#44523379467bbd2050af931a040d10c2b764b443 for pr-124305
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaurabhghatnekar%2FRust101" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/saurabhghatnekar/Rust101 on toolchain 44523379467bbd2050af931a040d10c2b764b443
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/saurabhghatnekar/Rust101
[INFO] finished tweaking git repo https://github.com/saurabhghatnekar/Rust101
[INFO] tweaked toml for git repo https://github.com/saurabhghatnekar/Rust101 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/saurabhghatnekar/Rust101 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" "+44523379467bbd2050af931a040d10c2b764b443" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6dda2202d1af3d458d71bc2a245961004df394d81615babf7583d5de6ab49660
[INFO] running `Command { std: "docker" "start" "-a" "6dda2202d1af3d458d71bc2a245961004df394d81615babf7583d5de6ab49660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6dda2202d1af3d458d71bc2a245961004df394d81615babf7583d5de6ab49660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dda2202d1af3d458d71bc2a245961004df394d81615babf7583d5de6ab49660", kill_on_drop: false }`
[INFO] [stdout] 6dda2202d1af3d458d71bc2a245961004df394d81615babf7583d5de6ab49660
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a812cc93e67d93a4a7ca6a14749a08da79e12d59d30fce1e0f39d974f9d71fe
[INFO] running `Command { std: "docker" "start" "-a" "5a812cc93e67d93a4a7ca6a14749a08da79e12d59d30fce1e0f39d974f9d71fe", kill_on_drop: false }`
[INFO] [stderr]     Checking Rust101 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `person`
[INFO] [stdout]   --> src/bin/task_1.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let person = Person { name: "Billy".to_owned(), age: 21 };
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_person`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `library`
[INFO] [stdout]   --> src/bin/task_1.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let library = Library {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_library`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]  --> src/bin/task_1.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person {
[INFO] [stdout]   |        ------ fields in this struct
[INFO] [stdout] 2 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 3 |     age: usize,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `title`, `author`, and `is_available` are never read
[INFO] [stdout]  --> src/bin/task_1.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Book {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 7 |     title: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     author: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 9 |     is_available: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `books` is never read
[INFO] [stdout]   --> src/bin/task_1.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Library {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 13 |     books: Vec<Book>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `person`
[INFO] [stdout]   --> src/bin/task_1.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let person = Person { name: "Billy".to_owned(), age: 21 };
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_person`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `library`
[INFO] [stdout]   --> src/bin/task_1.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let library = Library {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_library`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]  --> src/bin/task_1.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person {
[INFO] [stdout]   |        ------ fields in this struct
[INFO] [stdout] 2 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 3 |     age: usize,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `title`, `author`, and `is_available` are never read
[INFO] [stdout]  --> src/bin/task_1.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Book {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 7 |     title: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     author: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 9 |     is_available: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `books` is never read
[INFO] [stdout]   --> src/bin/task_1.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Library {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 13 |     books: Vec<Book>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "5a812cc93e67d93a4a7ca6a14749a08da79e12d59d30fce1e0f39d974f9d71fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a812cc93e67d93a4a7ca6a14749a08da79e12d59d30fce1e0f39d974f9d71fe", kill_on_drop: false }`
[INFO] [stdout] 5a812cc93e67d93a4a7ca6a14749a08da79e12d59d30fce1e0f39d974f9d71fe