[INFO] cloning repository https://github.com/timvisee/aivd-2018-2-sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/timvisee/aivd-2018-2-sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimvisee%2Faivd-2018-2-sudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimvisee%2Faivd-2018-2-sudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 870748fd8ec137ea55764d463fd180882fe01854
[INFO] checking timvisee/aivd-2018-2-sudoku against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimvisee%2Faivd-2018-2-sudoku" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/timvisee/aivd-2018-2-sudoku on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/timvisee/aivd-2018-2-sudoku
[INFO] finished tweaking git repo https://github.com/timvisee/aivd-2018-2-sudoku
[INFO] tweaked toml for git repo https://github.com/timvisee/aivd-2018-2-sudoku written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/timvisee/aivd-2018-2-sudoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cae346b03463e6dc0bbce3dff96643b17113677fe8a34e9075cbf5a7a32ebc49
[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" "cae346b03463e6dc0bbce3dff96643b17113677fe8a34e9075cbf5a7a32ebc49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cae346b03463e6dc0bbce3dff96643b17113677fe8a34e9075cbf5a7a32ebc49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cae346b03463e6dc0bbce3dff96643b17113677fe8a34e9075cbf5a7a32ebc49", kill_on_drop: false }`
[INFO] [stdout] cae346b03463e6dc0bbce3dff96643b17113677fe8a34e9075cbf5a7a32ebc49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f95ee41488ff86230cb5533ff218efe9aaa99cbb73b2bf6a169d23bf9e3f2382
[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" "f95ee41488ff86230cb5533ff218efe9aaa99cbb73b2bf6a169d23bf9e3f2382", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling crunchy v0.2.1
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking num-complex v0.2.1
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking sudoku v0.7.0
[INFO] [stderr]     Checking num-iter v0.1.37
[INFO] [stderr]     Checking num-rational v0.2.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking permutator v0.2.2
[INFO] [stderr]     Checking aivd-sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]   --> src/main.rs:46:10
[INFO] [stdout]    |
[INFO] [stdout] 46 |         .into_iter()
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 46 |         .iter()
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     static ref SERIES: Vec<Vec<Coord>> = IntoIterator::into_iter([
[INFO] [stdout] 36 |             vec![(1, 1), (2, 1), (3, 2), (2, 2), (3, 1)],
[INFO] [stdout] 37 |             vec![(3, 4), (2, 3), (3, 3), (4, 4), (4, 3)],
[INFO] [stdout] 38 |             vec![(2, 7), (1, 6), (1, 5), (2, 4), (2, 5)],
[INFO] [stdout] 39 |             vec![(3, 6), (4, 6), (3, 7), (4, 7), (5, 8)],
[INFO] [stdout] 40 |             vec![(6, 7), (6, 8), (5, 9), (6, 9), (7, 9)],
[INFO] [stdout]  ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]   --> src/main.rs:46:10
[INFO] [stdout]    |
[INFO] [stdout] 46 |         .into_iter()
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 46 |         .iter()
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     static ref SERIES: Vec<Vec<Coord>> = IntoIterator::into_iter([
[INFO] [stdout] 36 |             vec![(1, 1), (2, 1), (3, 2), (2, 2), (3, 1)],
[INFO] [stdout] 37 |             vec![(3, 4), (2, 3), (3, 3), (4, 4), (4, 3)],
[INFO] [stdout] 38 |             vec![(2, 7), (1, 6), (1, 5), (2, 4), (2, 5)],
[INFO] [stdout] 39 |             vec![(3, 6), (4, 6), (3, 7), (4, 7), (5, 8)],
[INFO] [stdout] 40 |             vec![(6, 7), (6, 8), (5, 9), (6, 9), (7, 9)],
[INFO] [stdout]  ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.48s
[INFO] running `Command { std: "docker" "inspect" "f95ee41488ff86230cb5533ff218efe9aaa99cbb73b2bf6a169d23bf9e3f2382", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f95ee41488ff86230cb5533ff218efe9aaa99cbb73b2bf6a169d23bf9e3f2382", kill_on_drop: false }`
[INFO] [stdout] f95ee41488ff86230cb5533ff218efe9aaa99cbb73b2bf6a169d23bf9e3f2382