[INFO] cloning repository https://github.com/iammer/combine_k
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iammer/combine_k" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiammer%2Fcombine_k", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiammer%2Fcombine_k'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f16ebeb319882f88ca78bdd791b55aa296399c3d
[INFO] checking iammer/combine_k against master#7f5a42b073dc2bee2aa625052eb066ee07072048 for pr-78991
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiammer%2Fcombine_k" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iammer/combine_k on toolchain 7f5a42b073dc2bee2aa625052eb066ee07072048
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iammer/combine_k
[INFO] finished tweaking git repo https://github.com/iammer/combine_k
[INFO] tweaked toml for git repo https://github.com/iammer/combine_k written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/iammer/combine_k already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ab6c68139e3a791fbd5d71951a7ed25a8fc80da759315a3e12e19c55762d4c0
[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" "3ab6c68139e3a791fbd5d71951a7ed25a8fc80da759315a3e12e19c55762d4c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ab6c68139e3a791fbd5d71951a7ed25a8fc80da759315a3e12e19c55762d4c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ab6c68139e3a791fbd5d71951a7ed25a8fc80da759315a3e12e19c55762d4c0", kill_on_drop: false }`
[INFO] [stdout] 3ab6c68139e3a791fbd5d71951a7ed25a8fc80da759315a3e12e19c55762d4c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c77ff2f846c68339ed8943e1d0c98b206ed6039116bf9c0df5c70246a9fb862b
[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" "c77ff2f846c68339ed8943e1d0c98b206ed6039116bf9c0df5c70246a9fb862b", kill_on_drop: false }`
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking rand v0.3.18
[INFO] [stderr]     Checking combine_k v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/board/mod.rs:188:41
[INFO] [stdout]     |
[INFO] [stdout] 188 | fn scan_sequence(dir: Direction) -> Box<Iterator<Item=usize>> {
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/board/mod.rs:190:18
[INFO] [stdout]     |
[INFO] [stdout] 190 |         Box::new((0..LENGTH))
[INFO] [stdout]     |                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/board/mod.rs:188:41
[INFO] [stdout]     |
[INFO] [stdout] 188 | fn scan_sequence(dir: Direction) -> Box<Iterator<Item=usize>> {
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/board/mod.rs:190:18
[INFO] [stdout]     |
[INFO] [stdout] 190 |         Box::new((0..LENGTH))
[INFO] [stdout]     |                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.44s
[INFO] running `Command { std: "docker" "inspect" "c77ff2f846c68339ed8943e1d0c98b206ed6039116bf9c0df5c70246a9fb862b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c77ff2f846c68339ed8943e1d0c98b206ed6039116bf9c0df5c70246a9fb862b", kill_on_drop: false }`
[INFO] [stdout] c77ff2f846c68339ed8943e1d0c98b206ed6039116bf9c0df5c70246a9fb862b