[INFO] fetching crate chessman 0.1.0...
[INFO] checking chessman-0.1.0 against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] extracting crate chessman 0.1.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate chessman 0.1.0 on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chessman 0.1.0
[INFO] finished tweaking crates.io crate chessman 0.1.0
[INFO] tweaked toml for crates.io crate chessman 0.1.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pretty_assertions v0.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de9d0567a46581619ff46f68e56c672406bcef4d95d80862bbc68ee8c0da9ee6
[INFO] running `Command { std: "docker" "start" "-a" "de9d0567a46581619ff46f68e56c672406bcef4d95d80862bbc68ee8c0da9ee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de9d0567a46581619ff46f68e56c672406bcef4d95d80862bbc68ee8c0da9ee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de9d0567a46581619ff46f68e56c672406bcef4d95d80862bbc68ee8c0da9ee6", kill_on_drop: false }`
[INFO] [stdout] de9d0567a46581619ff46f68e56c672406bcef4d95d80862bbc68ee8c0da9ee6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 535664cf90cf0189f0f8ff31b5ac1ffdb01a3f6825d8cf451f878a1ed7fc3a4e
[INFO] running `Command { std: "docker" "start" "-a" "535664cf90cf0189f0f8ff31b5ac1ffdb01a3f6825d8cf451f878a1ed7fc3a4e", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking difference v1.0.0
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking chessman v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]     Checking pretty_assertions v0.3.4
[INFO] [stderr]        Fixed src/solvers/queens_iter.rs (2 fixes)
[INFO] [stdout] warning: constant is never used: `N`
[INFO] [stdout]  --> src/solvers/queens.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | const N: usize = 8;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `try1`
[INFO] [stdout]  --> src/solvers/queens.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn try1(mut board: &mut [[bool; N]; N], row: usize, mut count: &mut i64) {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/solvers/queens_iter.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `permutations`
[INFO] [stdout]   --> src/solvers/queens_iter.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn permutations<'a, T, I>(collection: I) -> Box<dyn Iterator<Item=LinkedList<T>> + 'a>
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/solvers/queens_iter.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(n: u32) -> NQueens {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/solvers/queens_iter.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `permutations`
[INFO] [stdout]   --> src/solvers/queens_iter.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn permutations<'a, T, I>(collection: I) -> Box<dyn Iterator<Item=LinkedList<T>> + 'a>
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/solvers/queens_iter.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(n: u32) -> NQueens {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.75s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking chessman v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: constant is never used: `N`
[INFO] [stdout]  --> src/solvers/queens.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | const N: usize = 8;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `try1`
[INFO] [stdout]  --> src/solvers/queens.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn try1(mut board: &mut [[bool; N]; N], row: usize, mut count: &mut i64) {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/solvers/queens_iter.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `permutations`
[INFO] [stdout]   --> src/solvers/queens_iter.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn permutations<'a, T, I>(collection: I) -> Box<dyn Iterator<Item=LinkedList<T>> + 'a>
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/solvers/queens_iter.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(n: u32) -> NQueens {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/solvers/queens_iter.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `permutations`
[INFO] [stdout]   --> src/solvers/queens_iter.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn permutations<'a, T, I>(collection: I) -> Box<dyn Iterator<Item=LinkedList<T>> + 'a>
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/solvers/queens_iter.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn new(n: u32) -> NQueens {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 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 0.39s
[INFO] running `Command { std: "docker" "inspect" "535664cf90cf0189f0f8ff31b5ac1ffdb01a3f6825d8cf451f878a1ed7fc3a4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "535664cf90cf0189f0f8ff31b5ac1ffdb01a3f6825d8cf451f878a1ed7fc3a4e", kill_on_drop: false }`
[INFO] [stdout] 535664cf90cf0189f0f8ff31b5ac1ffdb01a3f6825d8cf451f878a1ed7fc3a4e