[INFO] cloning repository https://github.com/toshipp/bonsaidb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/toshipp/bonsaidb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoshipp%2Fbonsaidb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoshipp%2Fbonsaidb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c65cc0cb6b0753878f0e11ff7fa6122c85793163
[INFO] checking toshipp/bonsaidb against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoshipp%2Fbonsaidb" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/toshipp/bonsaidb on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/toshipp/bonsaidb
[INFO] finished tweaking git repo https://github.com/toshipp/bonsaidb
[INFO] tweaked toml for git repo https://github.com/toshipp/bonsaidb written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/toshipp/bonsaidb already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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] b17fbab9d0ba13be44f7e6b1356217c56c9008ddb9079ae89df5ebe428e9d0ae
[INFO] running `Command { std: "docker" "start" "-a" "b17fbab9d0ba13be44f7e6b1356217c56c9008ddb9079ae89df5ebe428e9d0ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b17fbab9d0ba13be44f7e6b1356217c56c9008ddb9079ae89df5ebe428e9d0ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b17fbab9d0ba13be44f7e6b1356217c56c9008ddb9079ae89df5ebe428e9d0ae", kill_on_drop: false }`
[INFO] [stdout] b17fbab9d0ba13be44f7e6b1356217c56c9008ddb9079ae89df5ebe428e9d0ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ab28c4a48356b0f2b5aa1b8a1c1ca54071cdd4168e5767a161033af399dc6c9
[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" "1ab28c4a48356b0f2b5aa1b8a1c1ca54071cdd4168e5767a161033af399dc6c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking futures-io v0.3.4
[INFO] [stderr]     Checking once_cell v1.3.1
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking futures-timer v2.0.2
[INFO] [stderr]     Checking pin-project-lite v0.1.4
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking kv-log-macro v1.0.4
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking async-task v1.3.1
[INFO] [stderr]     Checking crossbeam-channel v0.4.2
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking async-std v1.5.0
[INFO] [stderr]     Checking bonsai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/main.rs:57:19
[INFO] [stdout]    |
[INFO] [stdout] 57 |     async fn open(path: impl AsRef<Path>) -> Result<Heap, ()> {
[INFO] [stdout]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heap`
[INFO] [stdout]   --> src/main.rs:61:29
[INFO] [stdout]    |
[INFO] [stdout] 61 |     async fn allocate_block(heap: &mut Heap) -> Result<Block, ()> {
[INFO] [stdout]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_heap`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Block`
[INFO] [stdout]   --> src/main.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     struct Block {}
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Heap`
[INFO] [stdout]   --> src/main.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     struct Heap {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PREAMBLE`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     const PREAMBLE: [u8; 4] = [0, 1, 2, 3];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `VERSION`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     const VERSION: u32 = 0;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Header`
[INFO] [stdout]   --> src/main.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     struct Header {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create`
[INFO] [stdout]   --> src/main.rs:28:22
[INFO] [stdout]    |
[INFO] [stdout] 28 |         pub async fn create(path: impl AsRef<Path>) -> Result<Heap, Error> {
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `open`
[INFO] [stdout]   --> src/main.rs:57:14
[INFO] [stdout]    |
[INFO] [stdout] 57 |     async fn open(path: impl AsRef<Path>) -> Result<Heap, ()> {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `allocate_block`
[INFO] [stdout]   --> src/main.rs:61:14
[INFO] [stdout]    |
[INFO] [stdout] 61 |     async fn allocate_block(heap: &mut Heap) -> Result<Block, ()> {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/main.rs:57:19
[INFO] [stdout]    |
[INFO] [stdout] 57 |     async fn open(path: impl AsRef<Path>) -> Result<Heap, ()> {
[INFO] [stdout]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heap`
[INFO] [stdout]   --> src/main.rs:61:29
[INFO] [stdout]    |
[INFO] [stdout] 61 |     async fn allocate_block(heap: &mut Heap) -> Result<Block, ()> {
[INFO] [stdout]    |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_heap`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Block`
[INFO] [stdout]   --> src/main.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     struct Block {}
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Heap`
[INFO] [stdout]   --> src/main.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     struct Heap {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PREAMBLE`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     const PREAMBLE: [u8; 4] = [0, 1, 2, 3];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `VERSION`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     const VERSION: u32 = 0;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Header`
[INFO] [stdout]   --> src/main.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     struct Header {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create`
[INFO] [stdout]   --> src/main.rs:28:22
[INFO] [stdout]    |
[INFO] [stdout] 28 |         pub async fn create(path: impl AsRef<Path>) -> Result<Heap, Error> {
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `open`
[INFO] [stdout]   --> src/main.rs:57:14
[INFO] [stdout]    |
[INFO] [stdout] 57 |     async fn open(path: impl AsRef<Path>) -> Result<Heap, ()> {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `allocate_block`
[INFO] [stdout]   --> src/main.rs:61:14
[INFO] [stdout]    |
[INFO] [stdout] 61 |     async fn allocate_block(heap: &mut Heap) -> Result<Block, ()> {
[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 11.68s
[INFO] running `Command { std: "docker" "inspect" "1ab28c4a48356b0f2b5aa1b8a1c1ca54071cdd4168e5767a161033af399dc6c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ab28c4a48356b0f2b5aa1b8a1c1ca54071cdd4168e5767a161033af399dc6c9", kill_on_drop: false }`
[INFO] [stdout] 1ab28c4a48356b0f2b5aa1b8a1c1ca54071cdd4168e5767a161033af399dc6c9