[INFO] fetching crate hamt-sync 0.2.5...
[INFO] checking hamt-sync-0.2.5 against master#39b841dfe36f90a7cd111e7f0c55f32594f6e578 for pr-77035
[INFO] extracting crate hamt-sync 0.2.5 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate hamt-sync 0.2.5 on toolchain 39b841dfe36f90a7cd111e7f0c55f32594f6e578
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hamt-sync 0.2.5
[INFO] finished tweaking crates.io crate hamt-sync 0.2.5
[INFO] tweaked toml for crates.io crate hamt-sync 0.2.5 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "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] 6077890a87e7d1704ef870aea8b1ae35c2e947e8ca1e5ddf11e79aaf7a102e27
[INFO] running `Command { std: "docker" "start" "-a" "6077890a87e7d1704ef870aea8b1ae35c2e947e8ca1e5ddf11e79aaf7a102e27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6077890a87e7d1704ef870aea8b1ae35c2e947e8ca1e5ddf11e79aaf7a102e27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6077890a87e7d1704ef870aea8b1ae35c2e947e8ca1e5ddf11e79aaf7a102e27", kill_on_drop: false }`
[INFO] [stdout] 6077890a87e7d1704ef870aea8b1ae35c2e947e8ca1e5ddf11e79aaf7a102e27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "check" "--frozen" "--all" "--all-targets" "--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] 86d680f367309a4c533d9380d42ad446ab6c21ffdbe3a1d45cb09a6ce1a7ad9a
[INFO] running `Command { std: "docker" "start" "-a" "86d680f367309a4c533d9380d42ad446ab6c21ffdbe3a1d45cb09a6ce1a7ad9a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking hamt-sync v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `NUM_BITS`
[INFO] [stdout]  --> src/bitmap.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | const NUM_BITS: usize = size_of::<Content>() * 8;
[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: `new`
[INFO] [stdout]   --> src/bitmap.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/bitmap.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn get(&self, i: u8) -> bool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set`
[INFO] [stdout]   --> src/bitmap.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn set(&self, i: u8) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unset`
[INFO] [stdout]   --> src/bitmap.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn unset(&self, i: u8) -> Self {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/bitmap.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn size(&self) -> u8 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.05s
[INFO] running `Command { std: "docker" "inspect" "86d680f367309a4c533d9380d42ad446ab6c21ffdbe3a1d45cb09a6ce1a7ad9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86d680f367309a4c533d9380d42ad446ab6c21ffdbe3a1d45cb09a6ce1a7ad9a", kill_on_drop: false }`
[INFO] [stdout] 86d680f367309a4c533d9380d42ad446ab6c21ffdbe3a1d45cb09a6ce1a7ad9a