[INFO] cloning repository https://github.com/Jhongilp/rust-in-action-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jhongilp/rust-in-action-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJhongilp%2Frust-in-action-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJhongilp%2Frust-in-action-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0e971103ac48ee941ea1cd68f319c7d68d0fa55c
[INFO] checking Jhongilp/rust-in-action-book against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJhongilp%2Frust-in-action-book" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Jhongilp/rust-in-action-book on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Jhongilp/rust-in-action-book
[INFO] finished tweaking git repo https://github.com/Jhongilp/rust-in-action-book
[INFO] tweaked toml for git repo https://github.com/Jhongilp/rust-in-action-book written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Jhongilp/rust-in-action-book already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8525b8d6cdfc8a2223d8af9947254bc46e69147ca380e4e7a860efb523951fe2
[INFO] running `Command { std: "docker" "start" "-a" "8525b8d6cdfc8a2223d8af9947254bc46e69147ca380e4e7a860efb523951fe2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8525b8d6cdfc8a2223d8af9947254bc46e69147ca380e4e7a860efb523951fe2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8525b8d6cdfc8a2223d8af9947254bc46e69147ca380e4e7a860efb523951fe2", kill_on_drop: false }`
[INFO] [stdout] 8525b8d6cdfc8a2223d8af9947254bc46e69147ca380e4e7a860efb523951fe2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0780ea6bae87a81a385b8af772df45113309cef85a621f268bdd0f2ef0d6c7f
[INFO] running `Command { std: "docker" "start" "-a" "e0780ea6bae87a81a385b8af772df45113309cef85a621f268bdd0f2ef0d6c7f", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_in_action_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/main.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn open(f: &mut File) -> bool {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/main.rs:37:10
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn close(f: &mut File) -> bool {
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/main.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn open(f: &mut File) -> bool {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/main.rs:37:10
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn close(f: &mut File) -> bool {
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "e0780ea6bae87a81a385b8af772df45113309cef85a621f268bdd0f2ef0d6c7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0780ea6bae87a81a385b8af772df45113309cef85a621f268bdd0f2ef0d6c7f", kill_on_drop: false }`
[INFO] [stdout] e0780ea6bae87a81a385b8af772df45113309cef85a621f268bdd0f2ef0d6c7f