[INFO] cloning repository https://github.com/Noah2610/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/Noah2610/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNoah2610%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNoah2610%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a98916f1c149fa8a42de220b7b7427b2550da1c2
[INFO] checking Noah2610/rust-playground against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNoah2610%2Frust-playground" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Noah2610/rust-playground on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Noah2610/rust-playground
[INFO] finished tweaking git repo https://github.com/Noah2610/rust-playground
[INFO] tweaked toml for git repo https://github.com/Noah2610/rust-playground written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/Noah2610/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 19fc34fe0c6e56fa7d9be5bb6a6bdde1a000b04f1821902d631209ab0db40973
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "19fc34fe0c6e56fa7d9be5bb6a6bdde1a000b04f1821902d631209ab0db40973", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19fc34fe0c6e56fa7d9be5bb6a6bdde1a000b04f1821902d631209ab0db40973", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19fc34fe0c6e56fa7d9be5bb6a6bdde1a000b04f1821902d631209ab0db40973", kill_on_drop: false }`
[INFO] [stdout] 19fc34fe0c6e56fa7d9be5bb6a6bdde1a000b04f1821902d631209ab0db40973
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22e4dde075ae91a3bb80fdb6a2e33a282942c0ffeb6b8b1d55d34843b049520d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "22e4dde075ae91a3bb80fdb6a2e33a282942c0ffeb6b8b1d55d34843b049520d", kill_on_drop: false }`
[INFO] [stderr]     Checking andrew-tut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0753]: expected outer doc comment
[INFO] [stdout]   --> src/food/mod.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             //! The `format!()` [macro] lets us create a `String` with a pattern,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0753]: expected outer doc comment
[INFO] [stdout]   --> src/food/mod.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             //! equal to how the `println!()` macro does it.
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0753]: expected outer doc comment
[INFO] [stdout]   --> src/food/mod.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             //! [macro]: https://doc.rust-lang.org/book/ch19-06-macros.html
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0753]: expected outer doc comment
[INFO] [stdout]   --> src/food/mod.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             //! The `format!()` [macro] lets us create a `String` with a pattern,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0753]: expected outer doc comment
[INFO] [stdout]   --> src/food/mod.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             //! equal to how the `println!()` macro does it.
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0753]: expected outer doc comment
[INFO] [stdout]   --> src/food/mod.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             //! [macro]: https://doc.rust-lang.org/book/ch19-06-macros.html
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/food/mod.rs:45:13
[INFO] [stdout]     |
[INFO] [stdout] 45  | /             //! The `format!()` [macro] lets us create a `String` with a pattern,
[INFO] [stdout] 46  | |             //! equal to how the `println!()` macro does it.
[INFO] [stdout] 47  | |             //! [macro]: https://doc.rust-lang.org/book/ch19-06-macros.html
[INFO] [stdout]     | |___________________________________________________________________________^
[INFO] [stdout] 48  | /             Some(color) => format!("This apple is {:?}", color),
[INFO] [stdout] 49  | |             None        => String::from("This apple has no color :("),
[INFO] [stdout] 50  | |         }
[INFO] [stdout] 51  | |     }
[INFO] [stdout] ...   |
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0753`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `andrew-tut`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/food/mod.rs:45:13
[INFO] [stdout]     |
[INFO] [stdout] 45  | /             //! The `format!()` [macro] lets us create a `String` with a pattern,
[INFO] [stdout] 46  | |             //! equal to how the `println!()` macro does it.
[INFO] [stdout] 47  | |             //! [macro]: https://doc.rust-lang.org/book/ch19-06-macros.html
[INFO] [stdout]     | |___________________________________________________________________________^
[INFO] [stdout] 48  | /             Some(color) => format!("This apple is {:?}", color),
[INFO] [stdout] 49  | |             None        => String::from("This apple has no color :("),
[INFO] [stdout] 50  | |         }
[INFO] [stdout] 51  | |     }
[INFO] [stdout] ...   |
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0753`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "22e4dde075ae91a3bb80fdb6a2e33a282942c0ffeb6b8b1d55d34843b049520d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22e4dde075ae91a3bb80fdb6a2e33a282942c0ffeb6b8b1d55d34843b049520d", kill_on_drop: false }`
[INFO] [stdout] 22e4dde075ae91a3bb80fdb6a2e33a282942c0ffeb6b8b1d55d34843b049520d