[INFO] cloning repository https://github.com/hxxcxx/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hxxcxx/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhxxcxx%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhxxcxx%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d485541c15d0fb6cd851f62e4f9c1c84e3dbf7a4
[INFO] checking hxxcxx/rust-playground against c999cef531ea9059e189e82fe0e82c5daf249bc9 for pr-152972
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhxxcxx%2Frust-playground" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hxxcxx/rust-playground
[INFO] finished tweaking git repo https://github.com/hxxcxx/rust-playground
[INFO] tweaked toml for git repo https://github.com/hxxcxx/rust-playground written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hxxcxx/rust-playground on toolchain c999cef531ea9059e189e82fe0e82c5daf249bc9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c999cef531ea9059e189e82fe0e82c5daf249bc9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/hxxcxx/rust-playground 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" "+c999cef531ea9059e189e82fe0e82c5daf249bc9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] db40ffe673593af6ff6c568c504662f33ef9ee3ec4f3aa3583522eb86a31741d
[INFO] running `Command { std: "docker" "start" "db40ffe673593af6ff6c568c504662f33ef9ee3ec4f3aa3583522eb86a31741d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db40ffe673593af6ff6c568c504662f33ef9ee3ec4f3aa3583522eb86a31741d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "db40ffe673593af6ff6c568c504662f33ef9ee3ec4f3aa3583522eb86a31741d" "/opt/rustwide/cargo-home/bin/cargo" "+c999cef531ea9059e189e82fe0e82c5daf249bc9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db40ffe673593af6ff6c568c504662f33ef9ee3ec4f3aa3583522eb86a31741d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "db40ffe673593af6ff6c568c504662f33ef9ee3ec4f3aa3583522eb86a31741d" "/opt/rustwide/cargo-home/bin/cargo" "+c999cef531ea9059e189e82fe0e82c5daf249bc9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]     Checking crossbeam-queue v0.3.12
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[INFO] [stderr]     Checking impl-more v0.1.9
[INFO] [stderr]     Checking ch04_ownership v0.1.0 (/opt/rustwide/workdir/chapters/ch04_ownership)
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking crossbeam v0.8.4
[INFO] [stderr]     Checking regex v1.12.4
[INFO] [stderr]     Checking derive_more v2.1.1
[INFO] [stderr]     Checking scratch v0.1.0 (/opt/rustwide/workdir/scratch)
[INFO] [stderr]     Checking ch01_intro v0.1.0 (/opt/rustwide/workdir/chapters/ch01_intro)
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[INFO] [stderr]     Checking tokio-util v0.7.18
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[INFO] [stderr]     Checking ch20_async v0.1.0 (/opt/rustwide/workdir/chapters/ch20_async)
[INFO] [stderr]     Checking av1-grain v0.2.5
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[INFO] [stderr]     Checking h2 v0.3.27
[INFO] [stderr]     Checking actix-codec v0.5.2
[INFO] [stderr]     Checking half v2.7.1
[INFO] [stderr]     Checking exr v1.74.0
[INFO] [stderr]     Checking tiff v0.11.3
[INFO] [stderr]    Compiling zstd-safe v7.2.4
[INFO] [stderr]     Checking zstd v0.13.3
[INFO] [stderr]     Checking actix-http v3.12.1
[INFO] [stderr]     Checking ravif v0.13.0
[INFO] [stderr]     Checking image v0.25.10
[INFO] [stderr]     Checking actix-web v4.13.0
[INFO] [stderr]     Checking ch02_overview v0.1.0 (/opt/rustwide/workdir/chapters/ch02_overview)
[INFO] [stderr] warning: unused dependency `actix-web`
[INFO] [stderr]   --> chapters/ch02_overview/Cargo.toml:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | actix-web = "4"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `actix-web`
[INFO] [stderr] help: to still use for development builds, move to `dev-dependencies`
[INFO] [stderr] warning: unused dependency `crossbeam`
[INFO] [stderr]   --> chapters/ch02_overview/Cargo.toml:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | crossbeam = "0.8"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `crossbeam`
[INFO] [stderr] help: to still use for development builds, move to `dev-dependencies`
[INFO] [stderr] warning: unused dependency `image`
[INFO] [stderr]   --> chapters/ch02_overview/Cargo.toml:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | image = "0.25"
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `image`
[INFO] [stderr] help: to still use for development builds, move to `dev-dependencies`
[INFO] [stderr] warning: unused dependency `num`
[INFO] [stderr]   --> chapters/ch02_overview/Cargo.toml:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | num = "0.4"
[INFO] [stderr]    | ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `num`
[INFO] [stderr] help: to still use for development builds, move to `dev-dependencies`
[INFO] [stderr] warning: unused dependency `owo-colors`
[INFO] [stderr]   --> chapters/ch02_overview/Cargo.toml:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | owo-colors = "4"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `owo-colors`
[INFO] [stderr] help: to still use for development builds, move to `dev-dependencies`
[INFO] [stderr] warning: `ch02_overview` (manifest) generated 5 warnings
[INFO] [stderr] warning: unused dependency `tokio`
[INFO] [stderr]   --> chapters/ch20_async/Cargo.toml:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | tokio = { version = "1", features = ["rt-multi-thread", "macros", "time", "sync", "rt"] }
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `tokio`
[INFO] [stderr] help: to still use for development builds, move to `dev-dependencies`
[INFO] [stderr] warning: `ch20_async` (manifest) generated 1 warning
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 03s
[INFO] running `Command { std: "docker" "inspect" "db40ffe673593af6ff6c568c504662f33ef9ee3ec4f3aa3583522eb86a31741d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db40ffe673593af6ff6c568c504662f33ef9ee3ec4f3aa3583522eb86a31741d", kill_on_drop: false }`
[INFO] [stdout] db40ffe673593af6ff6c568c504662f33ef9ee3ec4f3aa3583522eb86a31741d
