[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-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsbesselsen%2Frust-chess" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sbesselsen/rust-chess on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-4/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-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 78f5995c649972ad66df4fc0f11edb7192bbb7ef80993cc27e3bb6be4c3868ed
[INFO] running `Command { std: "docker" "start" "-a" "78f5995c649972ad66df4fc0f11edb7192bbb7ef80993cc27e3bb6be4c3868ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78f5995c649972ad66df4fc0f11edb7192bbb7ef80993cc27e3bb6be4c3868ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78f5995c649972ad66df4fc0f11edb7192bbb7ef80993cc27e3bb6be4c3868ed", kill_on_drop: false }`
[INFO] [stdout] 78f5995c649972ad66df4fc0f11edb7192bbb7ef80993cc27e3bb6be4c3868ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 652f70da894277250d761cceb3a6adaba3175ba517cc81f2515d973ed8d7c6ca
[INFO] running `Command { std: "docker" "start" "-a" "652f70da894277250d761cceb3a6adaba3175ba517cc81f2515d973ed8d7c6ca", 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 3.32s
[INFO] running `Command { std: "docker" "inspect" "652f70da894277250d761cceb3a6adaba3175ba517cc81f2515d973ed8d7c6ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "652f70da894277250d761cceb3a6adaba3175ba517cc81f2515d973ed8d7c6ca", kill_on_drop: false }`
[INFO] [stdout] 652f70da894277250d761cceb3a6adaba3175ba517cc81f2515d973ed8d7c6ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e9b38c7acc7e2db8568aecb2070ad250aa56bb8e97215ca057348f1bb6960f96
[INFO] running `Command { std: "docker" "start" "-a" "e9b38c7acc7e2db8568aecb2070ad250aa56bb8e97215ca057348f1bb6960f96", 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 test [unoptimized + debuginfo] target(s) in 1.22s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/chess-c39f1c2153c8d89b)
[INFO] running `Command { std: "docker" "inspect" "e9b38c7acc7e2db8568aecb2070ad250aa56bb8e97215ca057348f1bb6960f96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9b38c7acc7e2db8568aecb2070ad250aa56bb8e97215ca057348f1bb6960f96", kill_on_drop: false }`
[INFO] [stdout] e9b38c7acc7e2db8568aecb2070ad250aa56bb8e97215ca057348f1bb6960f96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5ffc5ac8278c15f4f15bf306d60cdf910b17376c70d6f3c2f55aede4d52d4341
[INFO] running `Command { std: "docker" "start" "-a" "5ffc5ac8278c15f4f15bf306d60cdf910b17376c70d6f3c2f55aede4d52d4341", kill_on_drop: false }`
[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 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/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" "5ffc5ac8278c15f4f15bf306d60cdf910b17376c70d6f3c2f55aede4d52d4341", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ffc5ac8278c15f4f15bf306d60cdf910b17376c70d6f3c2f55aede4d52d4341", kill_on_drop: false }`
[INFO] [stdout] 5ffc5ac8278c15f4f15bf306d60cdf910b17376c70d6f3c2f55aede4d52d4341