[INFO] updating cached repository https://github.com/sivakon/rust-exp
[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] 6411253d18b8a00ba05b0b068ed9a3b91a8a859d
[INFO] checking sivakon/rust-exp against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivakon%2Frust-exp" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sivakon/rust-exp 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/sivakon/rust-exp
[INFO] finished tweaking git repo https://github.com/sivakon/rust-exp
[INFO] tweaked toml for git repo https://github.com/sivakon/rust-exp written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/sivakon/rust-exp 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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 27596a6a25b6b38cf622bd936de37b81d483be8bccb8020a2af0a9bac0b7ffa5
[INFO] running `"docker" "start" "-a" "27596a6a25b6b38cf622bd936de37b81d483be8bccb8020a2af0a9bac0b7ffa5"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rustlvl2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: lint `unused_doc_comment` has been renamed to `unused_doc_comments`
[INFO] [stderr]   --> src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 | #[allow(unused_doc_comment)]
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^ help: use the new name: `unused_doc_comments`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: lint `unused_doc_comment` has been renamed to `unused_doc_comments`
[INFO] [stderr]   --> src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 | #[allow(unused_doc_comment)]
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^ help: use the new name: `unused_doc_comments`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/main.rs:97:5
[INFO] [stderr]     |
[INFO] [stderr] 97  | /     /**
[INFO] [stderr] 98  | |      * this is an unused documentation step
[INFO] [stderr] 99  | |      * HASHMAP
[INFO] [stderr] 100 | |      */
[INFO] [stderr]     | |_______^
[INFO] [stderr] ...
[INFO] [stderr] 103 |       let mut scores = HashMap::new();
[INFO] [stderr]     |       -------------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/main.rs:148:5
[INFO] [stderr]     |
[INFO] [stderr] 148 | /     /**
[INFO] [stderr] 149 | |      * Some exercises
[INFO] [stderr] 150 | |      */
[INFO] [stderr]     | |_______^
[INFO] [stderr] 151 |       let v = vec![1,2,3,4,5];
[INFO] [stderr]     |       ------------------------ rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/main.rs:97:5
[INFO] [stderr]     |
[INFO] [stderr] 97  | /     /**
[INFO] [stderr] 98  | |      * this is an unused documentation step
[INFO] [stderr] 99  | |      * HASHMAP
[INFO] [stderr] 100 | |      */
[INFO] [stderr]     | |_______^
[INFO] [stderr] ...
[INFO] [stderr] 103 |       let mut scores = HashMap::new();
[INFO] [stderr]     |       -------------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/main.rs:148:5
[INFO] [stderr]     |
[INFO] [stderr] 148 | /     /**
[INFO] [stderr] 149 | |      * Some exercises
[INFO] [stderr] 150 | |      */
[INFO] [stderr]     | |_______^
[INFO] [stderr] 151 |       let v = vec![1,2,3,4,5];
[INFO] [stderr]     |       ------------------------ rustdoc does not generate documentation for statements
[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 1.85s
[INFO] running `"docker" "inspect" "27596a6a25b6b38cf622bd936de37b81d483be8bccb8020a2af0a9bac0b7ffa5"`
[INFO] running `"docker" "rm" "-f" "27596a6a25b6b38cf622bd936de37b81d483be8bccb8020a2af0a9bac0b7ffa5"`
[INFO] [stdout] 27596a6a25b6b38cf622bd936de37b81d483be8bccb8020a2af0a9bac0b7ffa5