[INFO] cloning repository https://github.com/sbesselsen/rust-chess
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sbesselsen/rust-chess" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsbesselsen%2Frust-chess", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsbesselsen%2Frust-chess'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72eccbc1dea513ca60c938e49aa4d0a92b76bee5
[INFO] testing sbesselsen/rust-chess against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsbesselsen%2Frust-chess" "/workspace/builds/worker-80/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-80/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sbesselsen/rust-chess on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sbesselsen/rust-chess
[INFO] finished tweaking git repo https://github.com/sbesselsen/rust-chess
[INFO] tweaked toml for git repo https://github.com/sbesselsen/rust-chess written to /workspace/builds/worker-80/source/Cargo.toml
[INFO] crate git repo https://github.com/sbesselsen/rust-chess already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d36236eadc06fb3ebe623d70ba0948d00f177264a2e0035cae51afa0bc92c042
[INFO] running `Command { std: "docker" "start" "-a" "d36236eadc06fb3ebe623d70ba0948d00f177264a2e0035cae51afa0bc92c042", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d36236eadc06fb3ebe623d70ba0948d00f177264a2e0035cae51afa0bc92c042", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d36236eadc06fb3ebe623d70ba0948d00f177264a2e0035cae51afa0bc92c042", kill_on_drop: false }`
[INFO] [stdout] d36236eadc06fb3ebe623d70ba0948d00f177264a2e0035cae51afa0bc92c042
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdac737453c11661747165d01cdf83c7cec7b9979917f0516650fed5331fece9
[INFO] running `Command { std: "docker" "start" "-a" "bdac737453c11661747165d01cdf83c7cec7b9979917f0516650fed5331fece9", kill_on_drop: false }`
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `schaap_index`
[INFO] [stdout]    --> src/tests.rs:261:7
[INFO] [stdout]     |
[INFO] [stdout] 261 |   let schaap_index = tree.add_child("schaap", 0);
[INFO] [stdout]     |       ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_schaap_index`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `aap1`
[INFO] [stdout]    --> src/tests.rs:262:7
[INFO] [stdout]     |
[INFO] [stdout] 262 |   let aap1 = tree.add_child("aap 1", aap_index);
[INFO] [stdout]     |       ^^^^ help: if this is intentional, prefix it with an underscore: `_aap1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `aap1`
[INFO] [stdout]    --> src/tests.rs:267:7
[INFO] [stdout]     |
[INFO] [stdout] 267 |   let aap1 = tree2.add_child("aap 1", aap_index);
[INFO] [stdout]     |       ^^^^ help: if this is intentional, prefix it with an underscore: `_aap1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]    --> src/tests.rs:297:7
[INFO] [stdout]     |
[INFO] [stdout] 297 |   let board = Board::parse_str("
[INFO] [stdout]     |       ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]    --> src/util/grow_tree.rs:122:17
[INFO] [stdout]     |
[INFO] [stdout] 122 |             let len = items.len();
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `item`
[INFO] [stdout]   --> src/util/grow_tree.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn item(&self, index: usize) -> Option<&T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `item_mut`
[INFO] [stdout]   --> src/util/grow_tree.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn item_mut(&mut self, index: usize) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `root`
[INFO] [stdout]   --> src/util/grow_tree.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn root(&self) -> &T {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parent`
[INFO] [stdout]   --> src/util/grow_tree.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn parent(&self, index: usize) -> Option<(usize, &T)> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `map`
[INFO] [stdout]   --> src/util/grow_tree.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn map<F, O>(&self, f: F) -> GrowTree<O>
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.16s
[INFO] running `Command { std: "docker" "inspect" "bdac737453c11661747165d01cdf83c7cec7b9979917f0516650fed5331fece9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdac737453c11661747165d01cdf83c7cec7b9979917f0516650fed5331fece9", kill_on_drop: false }`
[INFO] [stdout] bdac737453c11661747165d01cdf83c7cec7b9979917f0516650fed5331fece9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac0c4b6c629894cc3ef92d09c025e406ac6e690d6e719c9f0652388102bdd022
[INFO] running `Command { std: "docker" "start" "-a" "ac0c4b6c629894cc3ef92d09c025e406ac6e690d6e719c9f0652388102bdd022", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `schaap_index`
[INFO] [stdout]    --> src/tests.rs:261:7
[INFO] [stdout]     |
[INFO] [stdout] 261 |   let schaap_index = tree.add_child("schaap", 0);
[INFO] [stdout]     |       ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_schaap_index`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `aap1`
[INFO] [stdout]    --> src/tests.rs:262:7
[INFO] [stdout]     |
[INFO] [stdout] 262 |   let aap1 = tree.add_child("aap 1", aap_index);
[INFO] [stdout]     |       ^^^^ help: if this is intentional, prefix it with an underscore: `_aap1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `aap1`
[INFO] [stdout]    --> src/tests.rs:267:7
[INFO] [stdout]     |
[INFO] [stdout] 267 |   let aap1 = tree2.add_child("aap 1", aap_index);
[INFO] [stdout]     |       ^^^^ help: if this is intentional, prefix it with an underscore: `_aap1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]    --> src/tests.rs:297:7
[INFO] [stdout]     |
[INFO] [stdout] 297 |   let board = Board::parse_str("
[INFO] [stdout]     |       ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]    --> src/util/grow_tree.rs:122:17
[INFO] [stdout]     |
[INFO] [stdout] 122 |             let len = items.len();
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `item`
[INFO] [stdout]   --> src/util/grow_tree.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn item(&self, index: usize) -> Option<&T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `item_mut`
[INFO] [stdout]   --> src/util/grow_tree.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn item_mut(&mut self, index: usize) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `root`
[INFO] [stdout]   --> src/util/grow_tree.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn root(&self) -> &T {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parent`
[INFO] [stdout]   --> src/util/grow_tree.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn parent(&self, index: usize) -> Option<(usize, &T)> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `map`
[INFO] [stdout]   --> src/util/grow_tree.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn map<F, O>(&self, f: F) -> GrowTree<O>
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 54.25s
[INFO] running `Command { std: "docker" "inspect" "ac0c4b6c629894cc3ef92d09c025e406ac6e690d6e719c9f0652388102bdd022", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac0c4b6c629894cc3ef92d09c025e406ac6e690d6e719c9f0652388102bdd022", kill_on_drop: false }`
[INFO] [stdout] ac0c4b6c629894cc3ef92d09c025e406ac6e690d6e719c9f0652388102bdd022
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 818f5034f88d316cd1fea3ae739f3a451726ffbb35bcf54a4da4aa871ad4b824
[INFO] running `Command { std: "docker" "start" "-a" "818f5034f88d316cd1fea3ae739f3a451726ffbb35bcf54a4da4aa871ad4b824", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused variable: `schaap_index`
[INFO] [stderr]    --> src/tests.rs:261:7
[INFO] [stderr]     |
[INFO] [stderr] 261 |   let schaap_index = tree.add_child("schaap", 0);
[INFO] [stderr]     |       ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_schaap_index`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `aap1`
[INFO] [stderr]    --> src/tests.rs:262:7
[INFO] [stderr]     |
[INFO] [stderr] 262 |   let aap1 = tree.add_child("aap 1", aap_index);
[INFO] [stderr]     |       ^^^^ help: if this is intentional, prefix it with an underscore: `_aap1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `aap1`
[INFO] [stderr]    --> src/tests.rs:267:7
[INFO] [stderr]     |
[INFO] [stderr] 267 |   let aap1 = tree2.add_child("aap 1", aap_index);
[INFO] [stderr]     |       ^^^^ help: if this is intentional, prefix it with an underscore: `_aap1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `board`
[INFO] [stderr]    --> src/tests.rs:297:7
[INFO] [stderr]     |
[INFO] [stderr] 297 |   let board = Board::parse_str("
[INFO] [stderr]     |       ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]    --> src/util/grow_tree.rs:122:17
[INFO] [stderr]     |
[INFO] [stderr] 122 |             let len = items.len();
[INFO] [stderr]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `item`
[INFO] [stderr]   --> src/util/grow_tree.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn item(&self, index: usize) -> Option<&T> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `item_mut`
[INFO] [stderr]   --> src/util/grow_tree.rs:40:12
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn item_mut(&mut self, index: usize) -> Option<&mut T> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `root`
[INFO] [stderr]   --> src/util/grow_tree.rs:44:12
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn root(&self) -> &T {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parent`
[INFO] [stderr]   --> src/util/grow_tree.rs:52:12
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn parent(&self, index: usize) -> Option<(usize, &T)> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `map`
[INFO] [stderr]   --> src/util/grow_tree.rs:60:12
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn map<F, O>(&self, f: F) -> GrowTree<O>
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `chess` (bin "chess" test) generated 10 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.40s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/chess-c39f1c2153c8d89b)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "818f5034f88d316cd1fea3ae739f3a451726ffbb35bcf54a4da4aa871ad4b824", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "818f5034f88d316cd1fea3ae739f3a451726ffbb35bcf54a4da4aa871ad4b824", kill_on_drop: false }`
[INFO] [stdout] 818f5034f88d316cd1fea3ae739f3a451726ffbb35bcf54a4da4aa871ad4b824