[INFO] fetching crate scc 0.3.1...
[INFO] checking scc-0.3.1 against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] extracting crate scc 0.3.1 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate scc 0.3.1 on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate scc 0.3.1
[INFO] finished tweaking crates.io crate scc 0.3.1
[INFO] tweaked toml for crates.io crate scc 0.3.1 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f076a3559e7b8f70131309578e26671f53075e3ff7de3e4423eb3555eb1a1cb9
[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" "f076a3559e7b8f70131309578e26671f53075e3ff7de3e4423eb3555eb1a1cb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f076a3559e7b8f70131309578e26671f53075e3ff7de3e4423eb3555eb1a1cb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f076a3559e7b8f70131309578e26671f53075e3ff7de3e4423eb3555eb1a1cb9", kill_on_drop: false }`
[INFO] [stdout] f076a3559e7b8f70131309578e26671f53075e3ff7de3e4423eb3555eb1a1cb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a907d67bd06e5c8e6941ea10e4515151c4ea5895960e43c8e7dea9ba4f33328
[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" "1a907d67bd06e5c8e6941ea10e4515151c4ea5895960e43c8e7dea9ba4f33328", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking scc v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `leaf::Leaf`
[INFO] [stdout]  --> src/treemap.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use leaf::Leaf;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `leaf::Leaf`
[INFO] [stdout]  --> src/treemap.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use leaf::Leaf;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Leaf`
[INFO] [stdout]  --> src/treemap/leaf.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Leaf<K: Ord + Sync, V: Sync> {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `key`
[INFO] [stdout]  --> src/treemap/node.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     key: K,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]  --> src/treemap/node.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     value: V,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next`
[INFO] [stdout]  --> src/treemap/node.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     next: Atomic<Node<K, V>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `key`
[INFO] [stdout]  --> src/treemap/queue.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     key: K,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]  --> src/treemap/queue.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     value: V,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `root`
[INFO] [stdout]   --> src/treemap.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     root: Atomic<(Node<K, V>, Queue<K, V>)>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `degree`
[INFO] [stdout]   --> src/treemap.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     degree: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/treemap.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn new(block_size: usize) -> TreeMap<K, V> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Leaf`
[INFO] [stdout]  --> src/treemap/leaf.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Leaf<K: Ord + Sync, V: Sync> {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `key`
[INFO] [stdout]  --> src/treemap/node.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     key: K,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]  --> src/treemap/node.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     value: V,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next`
[INFO] [stdout]  --> src/treemap/node.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     next: Atomic<Node<K, V>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `key`
[INFO] [stdout]  --> src/treemap/queue.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     key: K,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]  --> src/treemap/queue.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     value: V,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `root`
[INFO] [stdout]   --> src/treemap.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     root: Atomic<(Node<K, V>, Queue<K, V>)>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `degree`
[INFO] [stdout]   --> src/treemap.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     degree: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/treemap.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn new(block_size: usize) -> TreeMap<K, V> {
[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 3.85s
[INFO] running `Command { std: "docker" "inspect" "1a907d67bd06e5c8e6941ea10e4515151c4ea5895960e43c8e7dea9ba4f33328", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a907d67bd06e5c8e6941ea10e4515151c4ea5895960e43c8e7dea9ba4f33328", kill_on_drop: false }`
[INFO] [stdout] 1a907d67bd06e5c8e6941ea10e4515151c4ea5895960e43c8e7dea9ba4f33328