[INFO] fetching crate skiplist-rust 0.3.0... [INFO] testing skiplist-rust-0.3.0 against 1.90.0 for beta-1.91-3 [INFO] extracting crate skiplist-rust 0.3.0 into /workspace/builds/worker-5-tc1/source [INFO] removed /workspace/builds/worker-5-tc1/source/rust-toolchain.toml [INFO] started tweaking crates.io crate skiplist-rust 0.3.0 [INFO] finished tweaking crates.io crate skiplist-rust 0.3.0 [INFO] tweaked toml for crates.io crate skiplist-rust 0.3.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate skiplist-rust 0.3.0 on toolchain 1.90.0 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 14 packages to latest compatible versions [INFO] [stderr] Adding rand v0.8.5 (available: v0.9.2) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] cf7f8687a9e68cf0e51f824f7d5baf57b9e87c73132d1407cc7fd514cb071ec1 [INFO] running `Command { std: "docker" "start" "-a" "cf7f8687a9e68cf0e51f824f7d5baf57b9e87c73132d1407cc7fd514cb071ec1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "cf7f8687a9e68cf0e51f824f7d5baf57b9e87c73132d1407cc7fd514cb071ec1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cf7f8687a9e68cf0e51f824f7d5baf57b9e87c73132d1407cc7fd514cb071ec1", kill_on_drop: false }` [INFO] [stdout] cf7f8687a9e68cf0e51f824f7d5baf57b9e87c73132d1407cc7fd514cb071ec1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 888171ad0b0bbc44a4e21bdebc36a7af2de4991081ab6aa126fa84b2482b5964 [INFO] running `Command { std: "docker" "start" "-a" "888171ad0b0bbc44a4e21bdebc36a7af2de4991081ab6aa126fa84b2482b5964", kill_on_drop: false }` [INFO] [stderr] Compiling getrandom v0.2.16 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling skiplist-rust v0.3.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: struct `SkipList` is never constructed [INFO] [stdout] --> src/lib.rs:245:8 [INFO] [stdout] | [INFO] [stdout] 245 | struct SkipList { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `insert`, `contains`, and `iter` are never used [INFO] [stdout] --> src/lib.rs:254:12 [INFO] [stdout] | [INFO] [stdout] 253 | impl SkipList { [INFO] [stdout] | ------------------------------------------ associated items in this implementation [INFO] [stdout] 254 | pub fn new(arena: Arena) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 261 | pub fn insert(&self, key: K) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 268 | pub fn contains(&self, key: &K) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 274 | pub fn iter(&self) -> SkipListIterator { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/lib.rs:274:17 [INFO] [stdout] | [INFO] [stdout] 274 | pub fn iter(&self) -> SkipListIterator { [INFO] [stdout] | ^^^^^ ------------------- the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 274 | pub fn iter(&self) -> SkipListIterator<'_, K> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.63s [INFO] running `Command { std: "docker" "inspect" "888171ad0b0bbc44a4e21bdebc36a7af2de4991081ab6aa126fa84b2482b5964", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "888171ad0b0bbc44a4e21bdebc36a7af2de4991081ab6aa126fa84b2482b5964", kill_on_drop: false }` [INFO] [stdout] 888171ad0b0bbc44a4e21bdebc36a7af2de4991081ab6aa126fa84b2482b5964 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 55fa84b00a53acb7d6360c8baf641f86572aaa5f02f75961200d18552a5c9d1f [INFO] running `Command { std: "docker" "start" "-a" "55fa84b00a53acb7d6360c8baf641f86572aaa5f02f75961200d18552a5c9d1f", kill_on_drop: false }` [INFO] [stdout] warning: struct `SkipList` is never constructed [INFO] [stdout] --> src/lib.rs:245:8 [INFO] [stdout] | [INFO] [stdout] 245 | struct SkipList { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `insert`, `contains`, and `iter` are never used [INFO] [stdout] --> src/lib.rs:254:12 [INFO] [stdout] | [INFO] [stdout] 253 | impl SkipList { [INFO] [stdout] | ------------------------------------------ associated items in this implementation [INFO] [stdout] 254 | pub fn new(arena: Arena) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 261 | pub fn insert(&self, key: K) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 268 | pub fn contains(&self, key: &K) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 274 | pub fn iter(&self) -> SkipListIterator { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling skiplist-rust v0.3.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/lib.rs:274:17 [INFO] [stdout] | [INFO] [stdout] 274 | pub fn iter(&self) -> SkipListIterator { [INFO] [stdout] | ^^^^^ ------------------- the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 274 | pub fn iter(&self) -> SkipListIterator<'_, K> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:313:13 [INFO] [stdout] | [INFO] [stdout] 313 | let mut list = SkipList::new(arena); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/lib.rs:274:17 [INFO] [stdout] | [INFO] [stdout] 274 | pub fn iter(&self) -> SkipListIterator { [INFO] [stdout] | ^^^^^ ------------------- the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 274 | pub fn iter(&self) -> SkipListIterator<'_, K> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.75s [INFO] running `Command { std: "docker" "inspect" "55fa84b00a53acb7d6360c8baf641f86572aaa5f02f75961200d18552a5c9d1f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "55fa84b00a53acb7d6360c8baf641f86572aaa5f02f75961200d18552a5c9d1f", kill_on_drop: false }` [INFO] [stdout] 55fa84b00a53acb7d6360c8baf641f86572aaa5f02f75961200d18552a5c9d1f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 1d26486f708176367d18b780d50924b656d78962efef0849dba8c2d0ab8e2b3e [INFO] running `Command { std: "docker" "start" "-a" "1d26486f708176367d18b780d50924b656d78962efef0849dba8c2d0ab8e2b3e", kill_on_drop: false }` [INFO] [stderr] warning: struct `SkipList` is never constructed [INFO] [stderr] --> src/lib.rs:245:8 [INFO] [stderr] | [INFO] [stderr] 245 | struct SkipList { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: associated items `new`, `insert`, `contains`, and `iter` are never used [INFO] [stderr] --> src/lib.rs:254:12 [INFO] [stderr] | [INFO] [stderr] 253 | impl SkipList { [INFO] [stderr] | ------------------------------------------ associated items in this implementation [INFO] [stderr] 254 | pub fn new(arena: Arena) -> Self { [INFO] [stderr] | ^^^ [INFO] [stderr] ... [INFO] [stderr] 261 | pub fn insert(&self, key: K) { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] ... [INFO] [stderr] 268 | pub fn contains(&self, key: &K) -> bool { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] ... [INFO] [stderr] 274 | pub fn iter(&self) -> SkipListIterator { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stderr] --> src/lib.rs:274:17 [INFO] [stderr] | [INFO] [stderr] 274 | pub fn iter(&self) -> SkipListIterator { [INFO] [stderr] | ^^^^^ ------------------- the same lifetime is hidden here [INFO] [stderr] | | [INFO] [stderr] | the lifetime is elided here [INFO] [stderr] | [INFO] [stderr] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stderr] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stderr] help: use `'_` for type paths [INFO] [stderr] | [INFO] [stderr] 274 | pub fn iter(&self) -> SkipListIterator<'_, K> { [INFO] [stderr] | +++ [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/lib.rs:313:13 [INFO] [stderr] | [INFO] [stderr] 313 | let mut list = SkipList::new(arena); [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `skiplist-rust` (lib) generated 3 warnings [INFO] [stderr] warning: `skiplist-rust` (lib test) generated 2 warnings (1 duplicate) (run `cargo fix --lib -p skiplist-rust --tests` to apply 1 suggestion) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/skiplist_rust-0583178d06d8b290) [INFO] [stdout] [INFO] [stdout] running 11 tests [INFO] [stdout] test arena::test::test_arena_empty ... ok [INFO] [stdout] test tests::test_empty ... ok [INFO] [stdout] test tests::insert_and_lookup ... ok [INFO] [stdout] test tests::test_concurrent_write ... ok [INFO] [stdout] test arena::test::test_arena_simple ... ok [INFO] [stdout] test tests::concurrent_without_threads ... ok [INFO] [stdout] test tests::concurrent_1 ... ok [INFO] [stdout] test tests::concurrent_5 ... ok [INFO] [stdout] test tests::concurrent_3 ... ok [INFO] [stdout] test tests::concurrent_2 ... ok [INFO] [stdout] test tests::concurrent_4 ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 23.46s [INFO] [stdout] [INFO] [stderr] Doc-tests skiplist_rust [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" "1d26486f708176367d18b780d50924b656d78962efef0849dba8c2d0ab8e2b3e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1d26486f708176367d18b780d50924b656d78962efef0849dba8c2d0ab8e2b3e", kill_on_drop: false }` [INFO] [stdout] 1d26486f708176367d18b780d50924b656d78962efef0849dba8c2d0ab8e2b3e