[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 try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiammer%2Fcombine_k" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iammer/combine_k on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-15/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" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 122e85d0fd8fbe10a0016158c813a0c7faf42a83e6213d36cada06ac5d3ca6ac
[INFO] running `Command { std: "docker" "start" "-a" "122e85d0fd8fbe10a0016158c813a0c7faf42a83e6213d36cada06ac5d3ca6ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "122e85d0fd8fbe10a0016158c813a0c7faf42a83e6213d36cada06ac5d3ca6ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "122e85d0fd8fbe10a0016158c813a0c7faf42a83e6213d36cada06ac5d3ca6ac", kill_on_drop: false }`
[INFO] [stdout] 122e85d0fd8fbe10a0016158c813a0c7faf42a83e6213d36cada06ac5d3ca6ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38c297f6dd10ca8ffd06651604496cb2d9b9077e1cfefc70cc199c375cc29163
[INFO] running `Command { std: "docker" "start" "-a" "38c297f6dd10ca8ffd06651604496cb2d9b9077e1cfefc70cc199c375cc29163", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking termion v1.5.1
[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]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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 1.80s
[INFO] running `Command { std: "docker" "inspect" "38c297f6dd10ca8ffd06651604496cb2d9b9077e1cfefc70cc199c375cc29163", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38c297f6dd10ca8ffd06651604496cb2d9b9077e1cfefc70cc199c375cc29163", kill_on_drop: false }`
[INFO] [stdout] 38c297f6dd10ca8ffd06651604496cb2d9b9077e1cfefc70cc199c375cc29163