[INFO] cloning repository https://github.com/sim82/rusdoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sim82/rusdoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsim82%2Frusdoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsim82%2Frusdoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aa8f7b42ea5986954b1d5516a79adad2f8f13570
[INFO] checking sim82/rusdoku against master#336209eef13882bd1e211b24779584cb7ef911eb for pr-129249
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsim82%2Frusdoku" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sim82/rusdoku on toolchain 336209eef13882bd1e211b24779584cb7ef911eb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sim82/rusdoku
[INFO] finished tweaking git repo https://github.com/sim82/rusdoku
[INFO] tweaked toml for git repo https://github.com/sim82/rusdoku written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sim82/rusdoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitset-core v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 168f24e26c3bde4d2d6c4fd47825e5f1f0d7b59c6b02e9a6294c2cfb19e1f644
[INFO] running `Command { std: "docker" "start" "-a" "168f24e26c3bde4d2d6c4fd47825e5f1f0d7b59c6b02e9a6294c2cfb19e1f644", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "168f24e26c3bde4d2d6c4fd47825e5f1f0d7b59c6b02e9a6294c2cfb19e1f644", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "168f24e26c3bde4d2d6c4fd47825e5f1f0d7b59c6b02e9a6294c2cfb19e1f644", kill_on_drop: false }`
[INFO] [stdout] 168f24e26c3bde4d2d6c4fd47825e5f1f0d7b59c6b02e9a6294c2cfb19e1f644
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a42f057796e236081701d46a3715fb843c8a4461ad2d898c634659d8a3bf1137
[INFO] running `Command { std: "docker" "start" "-a" "a42f057796e236081701d46a3715fb843c8a4461ad2d898c634659d8a3bf1137", kill_on_drop: false }`
[INFO] [stderr]     Checking bit-vec v0.8.0
[INFO] [stderr]     Checking fixedbitset v0.5.7
[INFO] [stderr]     Checking bitset-core v0.1.1
[INFO] [stderr]     Checking bit-set v0.8.0
[INFO] [stderr]     Checking rusdoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `bit_set::BitSet`
[INFO] [stdout]  --> src/bin/easy.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use bit_set::BitSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet` and `HashSet`
[INFO] [stdout]  --> src/bin/easy.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::{BTreeSet, HashSet};
[INFO] [stdout]   |                        ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bit_set::BitSet`
[INFO] [stdout]  --> src/bin/elim.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use bit_set::BitSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet` and `HashSet`
[INFO] [stdout]  --> src/bin/elim.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::{BTreeSet, HashSet};
[INFO] [stdout]   |                        ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bit_set::BitSet`
[INFO] [stdout]  --> src/bin/easy.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use bit_set::BitSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet` and `HashSet`
[INFO] [stdout]  --> src/bin/easy.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::{BTreeSet, HashSet};
[INFO] [stdout]   |                        ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/elimf.rs:263:13
[INFO] [stdout]     |
[INFO] [stdout] 263 |         let mut board = Board::default();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bit_set::BitSet`
[INFO] [stdout]  --> src/bin/elim.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use bit_set::BitSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet` and `HashSet`
[INFO] [stdout]  --> src/bin/elim.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::{BTreeSet, HashSet};
[INFO] [stdout]   |                        ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/elim.rs:241:13
[INFO] [stdout]     |
[INFO] [stdout] 241 |         let mut board = Board::default();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "a42f057796e236081701d46a3715fb843c8a4461ad2d898c634659d8a3bf1137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a42f057796e236081701d46a3715fb843c8a4461ad2d898c634659d8a3bf1137", kill_on_drop: false }`
[INFO] [stdout] a42f057796e236081701d46a3715fb843c8a4461ad2d898c634659d8a3bf1137