[INFO] updating cached repository https://github.com/sivakon/rust-exp
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6411253d18b8a00ba05b0b068ed9a3b91a8a859d
[INFO] checking sivakon/rust-exp against master#1557fb031b272b4c5bfcc7de5df7eddc7b36a584 for pr-73166
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivakon%2Frust-exp" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sivakon/rust-exp on toolchain 1557fb031b272b4c5bfcc7de5df7eddc7b36a584
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-4/source/Cargo.toml
[INFO] crate git repo https://github.com/sivakon/rust-exp already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 03ef50207bc33ad2a21b17edeef2b46f4a4697e554dc0c875ea1af809a2ecbc6
[INFO] running `Command { std: "docker" "start" "-a" "03ef50207bc33ad2a21b17edeef2b46f4a4697e554dc0c875ea1af809a2ecbc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03ef50207bc33ad2a21b17edeef2b46f4a4697e554dc0c875ea1af809a2ecbc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03ef50207bc33ad2a21b17edeef2b46f4a4697e554dc0c875ea1af809a2ecbc6", kill_on_drop: false }`
[INFO] [stdout] 03ef50207bc33ad2a21b17edeef2b46f4a4697e554dc0c875ea1af809a2ecbc6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2af7b265dfca4599a52caa62e956b062b0e2a8274df29c3109820820d2d7c37d
[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" "2af7b265dfca4599a52caa62e956b062b0e2a8274df29c3109820820d2d7c37d", kill_on_drop: false }`
[INFO] [stderr]     Checking rustlvl2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lint `unused_doc_comment` has been renamed to `unused_doc_comments`
[INFO] [stdout]   --> src/main.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 | #[allow(unused_doc_comment)]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: use the new name: `unused_doc_comments`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lint `unused_doc_comment` has been renamed to `unused_doc_comments`
[INFO] [stdout]   --> src/main.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 | #[allow(unused_doc_comment)]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: use the new name: `unused_doc_comments`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/main.rs:97:5
[INFO] [stdout]     |
[INFO] [stdout] 97  | /     /**
[INFO] [stdout] 98  | |      * this is an unused documentation step
[INFO] [stdout] 99  | |      * HASHMAP
[INFO] [stdout] 100 | |      */
[INFO] [stdout]     | |_______^
[INFO] [stdout] ...
[INFO] [stdout] 103 |       let mut scores = HashMap::new();
[INFO] [stdout]     |       -------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/main.rs:97:5
[INFO] [stdout]     |
[INFO] [stdout] 97  | /     /**
[INFO] [stdout] 98  | |      * this is an unused documentation step
[INFO] [stdout] 99  | |      * HASHMAP
[INFO] [stdout] 100 | |      */
[INFO] [stdout]     | |_______^
[INFO] [stdout] ...
[INFO] [stdout] 103 |       let mut scores = HashMap::new();
[INFO] [stdout]     |       -------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/main.rs:148:5
[INFO] [stdout]     |
[INFO] [stdout] 148 | /     /**
[INFO] [stdout] 149 | |      * Some exercises
[INFO] [stdout] 150 | |      */
[INFO] [stdout]     | |_______^
[INFO] [stdout] 151 |       let v = vec![1,2,3,4,5];
[INFO] [stdout]     |       ------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/main.rs:148:5
[INFO] [stdout]     |
[INFO] [stdout] 148 | /     /**
[INFO] [stdout] 149 | |      * Some exercises
[INFO] [stdout] 150 | |      */
[INFO] [stdout]     | |_______^
[INFO] [stdout] 151 |       let v = vec![1,2,3,4,5];
[INFO] [stdout]     |       ------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "2af7b265dfca4599a52caa62e956b062b0e2a8274df29c3109820820d2d7c37d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2af7b265dfca4599a52caa62e956b062b0e2a8274df29c3109820820d2d7c37d", kill_on_drop: false }`
[INFO] [stdout] 2af7b265dfca4599a52caa62e956b062b0e2a8274df29c3109820820d2d7c37d