[INFO] cloning repository https://github.com/fukumotoeisuke/my_library
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fukumotoeisuke/my_library" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffukumotoeisuke%2Fmy_library", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffukumotoeisuke%2Fmy_library'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d1afcf58648059e81dbb43c63a0e1c784c9af038
[INFO] checking fukumotoeisuke/my_library against 1.95.0-beta.7 for beta-1.95-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffukumotoeisuke%2Fmy_library" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fukumotoeisuke/my_library
[INFO] finished tweaking git repo https://github.com/fukumotoeisuke/my_library
[INFO] tweaked toml for git repo https://github.com/fukumotoeisuke/my_library written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fukumotoeisuke/my_library on toolchain 1.95.0-beta.7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0-beta.7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fukumotoeisuke/my_library 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" "+1.95.0-beta.7" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking fukumotoeisuke/my_library against 1.95.0-beta.7 for beta-1.95-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffukumotoeisuke%2Fmy_library" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fukumotoeisuke/my_library
[INFO] finished tweaking git repo https://github.com/fukumotoeisuke/my_library
[INFO] tweaked toml for git repo https://github.com/fukumotoeisuke/my_library written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fukumotoeisuke/my_library on toolchain 1.95.0-beta.7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0-beta.7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fukumotoeisuke/my_library 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" "+1.95.0-beta.7" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0-beta.7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 15ca27cc6e822c7c23aad25ad906632504cc88e477247aef12e74ffca90ad14d
[INFO] running `Command { std: "docker" "start" "-a" "15ca27cc6e822c7c23aad25ad906632504cc88e477247aef12e74ffca90ad14d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15ca27cc6e822c7c23aad25ad906632504cc88e477247aef12e74ffca90ad14d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15ca27cc6e822c7c23aad25ad906632504cc88e477247aef12e74ffca90ad14d", kill_on_drop: false }`
[INFO] [stdout] 15ca27cc6e822c7c23aad25ad906632504cc88e477247aef12e74ffca90ad14d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0-beta.7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f39dbb2726b7cbf2d47d636669dd0e7df79ff7845ffb37d87ae1a56f1362745
[INFO] running `Command { std: "docker" "start" "-a" "8f39dbb2726b7cbf2d47d636669dd0e7df79ff7845ffb37d87ae1a56f1362745", kill_on_drop: false }`
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking fuzzy-matcher v0.3.7
[INFO] [stderr]     Checking my_library v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `book`
[INFO] [stdout]   --> src/library/bookshelf.rs:32:34
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn remove_book(&mut self,book: &Book) -> Option<Book> {
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_book`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `book`
[INFO] [stdout]   --> src/library/bookshelf.rs:32:34
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn remove_book(&mut self,book: &Book) -> Option<Book> {
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_book`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "8f39dbb2726b7cbf2d47d636669dd0e7df79ff7845ffb37d87ae1a56f1362745", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f39dbb2726b7cbf2d47d636669dd0e7df79ff7845ffb37d87ae1a56f1362745", kill_on_drop: false }`
[INFO] [stdout] 8f39dbb2726b7cbf2d47d636669dd0e7df79ff7845ffb37d87ae1a56f1362745