[INFO] updating cached repository https://github.com/Noah2610/rust-playground
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a98916f1c149fa8a42de220b7b7427b2550da1c2
[INFO] checking Noah2610/rust-playground against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNoah2610%2Frust-playground" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Noah2610/rust-playground on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Noah2610/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 72f4cee16e5eb3a8de8130cc85d145fdb735e8ce52014816bcce949bc70e6947
[INFO] running `"docker" "start" "-a" "72f4cee16e5eb3a8de8130cc85d145fdb735e8ce52014816bcce949bc70e6947"`
[INFO] [stderr]     Checking andrew-tut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/food/mod.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |  /         match self.color {
[INFO] [stderr] 45 |  |             //! The `format!()` [macro] lets us create a `String` with a pattern,
[INFO] [stderr]    |  |_____________^
[INFO] [stderr] 46 | ||             //! equal to how the `println!()` macro does it.
[INFO] [stderr] 47 | ||             //! [macro]: https://doc.rust-lang.org/book/ch19-06-macros.html
[INFO] [stderr]    | ||___________________________________________________________________________^
[INFO] [stderr] 48 |  |             Some(color) => format!("This apple is {:?}", color),
[INFO] [stderr] 49 |  |             None        => String::from("This apple has no color :("),
[INFO] [stderr] 50 |  |         }
[INFO] [stderr]    |  |_________- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/food/mod.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |  /         match self.color {
[INFO] [stderr] 45 |  |             //! The `format!()` [macro] lets us create a `String` with a pattern,
[INFO] [stderr]    |  |_____________^
[INFO] [stderr] 46 | ||             //! equal to how the `println!()` macro does it.
[INFO] [stderr] 47 | ||             //! [macro]: https://doc.rust-lang.org/book/ch19-06-macros.html
[INFO] [stderr]    | ||___________________________________________________________________________^
[INFO] [stderr] 48 |  |             Some(color) => format!("This apple is {:?}", color),
[INFO] [stderr] 49 |  |             None        => String::from("This apple has no color :("),
[INFO] [stderr] 50 |  |         }
[INFO] [stderr]    |  |_________- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Green`
[INFO] [stderr]  --> src/food/color.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Green,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Blue`
[INFO] [stderr]  --> src/food/color.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Blue,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Green`
[INFO] [stderr]  --> src/food/color.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Green,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Blue`
[INFO] [stderr]  --> src/food/color.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Blue,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "72f4cee16e5eb3a8de8130cc85d145fdb735e8ce52014816bcce949bc70e6947"`
[INFO] running `"docker" "rm" "-f" "72f4cee16e5eb3a8de8130cc85d145fdb735e8ce52014816bcce949bc70e6947"`
[INFO] [stdout] 72f4cee16e5eb3a8de8130cc85d145fdb735e8ce52014816bcce949bc70e6947