[INFO] fetching crate skippy-rs 0.0.0-alpha.4...
[INFO] testing skippy-rs-0.0.0-alpha.4 against 1.76.0 for beta-1.77-1
[INFO] extracting crate skippy-rs 0.0.0-alpha.4 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate skippy-rs 0.0.0-alpha.4 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate skippy-rs 0.0.0-alpha.4
[INFO] finished tweaking crates.io crate skippy-rs 0.0.0-alpha.4
[INFO] tweaked toml for crates.io crate skippy-rs 0.0.0-alpha.4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossbeam-skiplist v0.1.3
[INFO] [stderr]   Downloaded loom v0.7.1
[INFO] [stderr]   Downloaded haphazard v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 16158604f1d22ee2e2852e314209db42534f14b935e61926bb48049673af6780
[INFO] running `Command { std: "docker" "start" "-a" "16158604f1d22ee2e2852e314209db42534f14b935e61926bb48049673af6780", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16158604f1d22ee2e2852e314209db42534f14b935e61926bb48049673af6780", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16158604f1d22ee2e2852e314209db42534f14b935e61926bb48049673af6780", kill_on_drop: false }`
[INFO] [stdout] 16158604f1d22ee2e2852e314209db42534f14b935e61926bb48049673af6780
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61e97695a514f0555c9cacdb636940aae2b384001eed2d4c27fbbb31623a3d4b
[INFO] running `Command { std: "docker" "start" "-a" "61e97695a514f0555c9cacdb636940aae2b384001eed2d4c27fbbb31623a3d4b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling haphazard v0.1.8
[INFO] [stderr]    Compiling getrandom v0.2.12
[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 skippy-rs v0.0.0-alpha.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/internal/utils/node.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 276 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Iterator`
[INFO] [stdout]  --> src/internal/sync/iter.rs:4:46
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core::iter::{FromIterator, IntoIterator, Iterator};
[INFO] [stdout]   |                                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `traverse_with` is never used
[INFO] [stdout]    --> src/internal/skiplist.rs:286:8
[INFO] [stdout]     |
[INFO] [stdout] 8   | / impl<'domain, K, V> SkipList<'domain, K, V>
[INFO] [stdout] 9   | | where
[INFO] [stdout] 10  | |     K: Ord,
[INFO] [stdout]     | |___________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 286 |       fn traverse_with<F>(&self, mut f: F)
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `tag`, `try_tag`, and `as_hpz` are never used
[INFO] [stdout]    --> src/internal/sync/tagged.rs:74:19
[INFO] [stdout]     |
[INFO] [stdout] 7   | impl<T> MaybeTagged<T> {
[INFO] [stdout]     | ---------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 74  |     pub(crate) fn tag(&self, tag: usize) {
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84  |     pub(crate) fn try_tag(&self, expected: *mut T, tag: usize) -> Result<*mut T, *mut T> {
[INFO] [stdout]     |                   ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |     pub(crate) fn as_hpz(&self) -> &AtomicPtr<T> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `refs` is never used
[INFO] [stdout]    --> src/internal/utils/node.rs:137:19
[INFO] [stdout]     |
[INFO] [stdout] 75  | impl<K, V> Node<K, V> {
[INFO] [stdout]     | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 137 |     pub(crate) fn refs(&self) -> usize {
[INFO] [stdout]     |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_inner` is never used
[INFO] [stdout]   --> src/internal/utils/padded.rs:45:19
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl<T> Padded<T> {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 45 |     pub(crate) fn into_inner(self) -> T {
[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 2.70s
[INFO] running `Command { std: "docker" "inspect" "61e97695a514f0555c9cacdb636940aae2b384001eed2d4c27fbbb31623a3d4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61e97695a514f0555c9cacdb636940aae2b384001eed2d4c27fbbb31623a3d4b", kill_on_drop: false }`
[INFO] [stdout] 61e97695a514f0555c9cacdb636940aae2b384001eed2d4c27fbbb31623a3d4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 980a3dc1afbd4ce4008434ea8d7b1ea5ae04f3dd48970f9a204636eb5331ed7d
[INFO] running `Command { std: "docker" "start" "-a" "980a3dc1afbd4ce4008434ea8d7b1ea5ae04f3dd48970f9a204636eb5331ed7d", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/internal/utils/node.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 276 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Iterator`
[INFO] [stdout]  --> src/internal/sync/iter.rs:4:46
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core::iter::{FromIterator, IntoIterator, Iterator};
[INFO] [stdout]   |                                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `traverse_with` is never used
[INFO] [stdout]    --> src/internal/skiplist.rs:286:8
[INFO] [stdout]     |
[INFO] [stdout] 8   | / impl<'domain, K, V> SkipList<'domain, K, V>
[INFO] [stdout] 9   | | where
[INFO] [stdout] 10  | |     K: Ord,
[INFO] [stdout]     | |___________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 286 |       fn traverse_with<F>(&self, mut f: F)
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `tag`, `try_tag`, and `as_hpz` are never used
[INFO] [stdout]    --> src/internal/sync/tagged.rs:74:19
[INFO] [stdout]     |
[INFO] [stdout] 7   | impl<T> MaybeTagged<T> {
[INFO] [stdout]     | ---------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 74  |     pub(crate) fn tag(&self, tag: usize) {
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84  |     pub(crate) fn try_tag(&self, expected: *mut T, tag: usize) -> Result<*mut T, *mut T> {
[INFO] [stdout]     |                   ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |     pub(crate) fn as_hpz(&self) -> &AtomicPtr<T> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `refs` is never used
[INFO] [stdout]    --> src/internal/utils/node.rs:137:19
[INFO] [stdout]     |
[INFO] [stdout] 75  | impl<K, V> Node<K, V> {
[INFO] [stdout]     | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 137 |     pub(crate) fn refs(&self) -> usize {
[INFO] [stdout]     |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_inner` is never used
[INFO] [stdout]   --> src/internal/utils/padded.rs:45:19
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl<T> Padded<T> {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 45 |     pub(crate) fn into_inner(self) -> T {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling crossbeam-skiplist v0.1.3
[INFO] [stderr]    Compiling skippy-rs v0.0.0-alpha.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Iterator`
[INFO] [stdout]  --> src/internal/sync/iter.rs:4:46
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core::iter::{FromIterator, IntoIterator, Iterator};
[INFO] [stdout]   |                                              ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `tag`, `try_tag`, and `as_hpz` are never used
[INFO] [stdout]    --> src/internal/sync/tagged.rs:74:19
[INFO] [stdout]     |
[INFO] [stdout] 7   | impl<T> MaybeTagged<T> {
[INFO] [stdout]     | ---------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 74  |     pub(crate) fn tag(&self, tag: usize) {
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] ...
[INFO] [stdout] 84  |     pub(crate) fn try_tag(&self, expected: *mut T, tag: usize) -> Result<*mut T, *mut T> {
[INFO] [stdout]     |                   ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |     pub(crate) fn as_hpz(&self) -> &AtomicPtr<T> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_inner` is never used
[INFO] [stdout]   --> src/internal/utils/padded.rs:45:19
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl<T> Padded<T> {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 45 |     pub(crate) fn into_inner(self) -> T {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.05s
[INFO] running `Command { std: "docker" "inspect" "980a3dc1afbd4ce4008434ea8d7b1ea5ae04f3dd48970f9a204636eb5331ed7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "980a3dc1afbd4ce4008434ea8d7b1ea5ae04f3dd48970f9a204636eb5331ed7d", kill_on_drop: false }`
[INFO] [stdout] 980a3dc1afbd4ce4008434ea8d7b1ea5ae04f3dd48970f9a204636eb5331ed7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b3df00a5ac6d8a1465b51ddd53f9ef72b2c530e762659e05fe3649c0fcb74234
[INFO] running `Command { std: "docker" "start" "-a" "b3df00a5ac6d8a1465b51ddd53f9ef72b2c530e762659e05fe3649c0fcb74234", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/internal/utils/node.rs:276:9
[INFO] [stderr]     |
[INFO] [stderr] 276 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Iterator`
[INFO] [stderr]  --> src/internal/sync/iter.rs:4:46
[INFO] [stderr]   |
[INFO] [stderr] 4 | use core::iter::{FromIterator, IntoIterator, Iterator};
[INFO] [stderr]   |                                              ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `traverse_with` is never used
[INFO] [stderr]    --> src/internal/skiplist.rs:286:8
[INFO] [stderr]     |
[INFO] [stderr] 8   | / impl<'domain, K, V> SkipList<'domain, K, V>
[INFO] [stderr] 9   | | where
[INFO] [stderr] 10  | |     K: Ord,
[INFO] [stderr]     | |___________- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 286 |       fn traverse_with<F>(&self, mut f: F)
[INFO] [stderr]     |          ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: methods `tag`, `try_tag`, and `as_hpz` are never used
[INFO] [stderr]    --> src/internal/sync/tagged.rs:74:19
[INFO] [stderr]     |
[INFO] [stderr] 7   | impl<T> MaybeTagged<T> {
[INFO] [stderr]     | ---------------------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 74  |     pub(crate) fn tag(&self, tag: usize) {
[INFO] [stderr]     |                   ^^^
[INFO] [stderr] ...
[INFO] [stderr] 84  |     pub(crate) fn try_tag(&self, expected: *mut T, tag: usize) -> Result<*mut T, *mut T> {
[INFO] [stderr]     |                   ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 113 |     pub(crate) fn as_hpz(&self) -> &AtomicPtr<T> {
[INFO] [stderr]     |                   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `refs` is never used
[INFO] [stderr]    --> src/internal/utils/node.rs:137:19
[INFO] [stderr]     |
[INFO] [stderr] 75  | impl<K, V> Node<K, V> {
[INFO] [stderr]     | --------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 137 |     pub(crate) fn refs(&self) -> usize {
[INFO] [stderr]     |                   ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `into_inner` is never used
[INFO] [stderr]   --> src/internal/utils/padded.rs:45:19
[INFO] [stderr]    |
[INFO] [stderr] 40 | impl<T> Padded<T> {
[INFO] [stderr]    | ----------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 45 |     pub(crate) fn into_inner(self) -> T {
[INFO] [stderr]    |                   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Iterator`
[INFO] [stderr]  --> src/internal/sync/iter.rs:4:46
[INFO] [stderr]   |
[INFO] [stderr] 4 | use core::iter::{FromIterator, IntoIterator, Iterator};
[INFO] [stderr]   |                                              ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: methods `tag`, `try_tag`, and `as_hpz` are never used
[INFO] [stderr]    --> src/internal/sync/tagged.rs:74:19
[INFO] [stderr]     |
[INFO] [stderr] 7   | impl<T> MaybeTagged<T> {
[INFO] [stderr]     | ---------------------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 74  |     pub(crate) fn tag(&self, tag: usize) {
[INFO] [stderr]     |                   ^^^
[INFO] [stderr] ...
[INFO] [stderr] 84  |     pub(crate) fn try_tag(&self, expected: *mut T, tag: usize) -> Result<*mut T, *mut T> {
[INFO] [stderr]     |                   ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 113 |     pub(crate) fn as_hpz(&self) -> &AtomicPtr<T> {
[INFO] [stderr]     |                   ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `skippy-rs` (lib) generated 6 warnings (run `cargo fix --lib -p skippy-rs` to apply 1 suggestion)
[INFO] [stderr] warning: `skippy-rs` (lib test) generated 3 warnings (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/skippy_rs-e9cadc104d2c77ea)
[INFO] [stdout] 
[INFO] [stdout] running 28 tests
[INFO] [stdout] test collections::priority_queue::pq_test::test_push_pop ... ok
[INFO] [stdout] test internal::skiplist::skiplist_test::test_get_last ... ok
[INFO] [stdout] test internal::skiplist::skiplist_test::test_new_list ... ok
[INFO] [stdout] test internal::skiplist::skiplist_test::test_insert_verbose ... ok
[INFO] [stdout] test internal::skiplist::skiplist_test::test_new_node ... ok
[INFO] [stdout] test internal::skiplist::skiplist_test::test_rand_height ... ok
[INFO] [stdout] test collections::priority_queue::pq_test::test_push ... ok
[INFO] [stdout] test internal::skiplist::skiplist_test::test_traverse ... ok
[INFO] [stdout] test internal::sync::sync_test::test_drop ... ok
[INFO] [stdout] test internal::sync::sync_test::test_find_removed ... ok
[INFO] [stdout] test internal::skiplist::skiplist_test::test_verbose_remove ... ok
[INFO] [stdout] test internal::sync::sync_test::test_insert_verbose_sync ... ok
[INFO] [stdout] test internal::sync::sync_test::test_new_node_sync ... ok
[INFO] [stdout] test internal::sync::sync_test::test_new_list_sync ... ok
[INFO] [stdout] test internal::sync::sync_test::test_rand_height_sync ... ok
[INFO] [stdout] test collections::priority_queue::pq_test::test_pop ... ok
[INFO] [stdout] test collections::priority_queue::pq_test::test_sync_push ... ok
[INFO] [stdout] test internal::skiplist::skiplist_test::test_remove ... ok
[INFO] [stdout] test internal::skiplist::skiplist_test::test_insert ... ok
[INFO] [stdout] test internal::sync::sync_test::test_verbose_remove ... ok
[INFO] [stdout] test internal::utils::node::test::test_removed ... ok
[INFO] [stdout] test collections::priority_queue::pq_test::test_with_std ... ok
[INFO] [stdout] test internal::sync::sync_test::test_sync_iterate ... ok
[INFO] [stdout] test internal::sync::sync_test::test_sync_insert ... ok
[INFO] [stdout] test internal::sync::sync_test::test_sync_remove ... ok
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/skippy_rs-e9cadc104d2c77ea` (signal: 11, SIGSEGV: invalid memory reference)
[INFO] running `Command { std: "docker" "inspect" "b3df00a5ac6d8a1465b51ddd53f9ef72b2c530e762659e05fe3649c0fcb74234", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3df00a5ac6d8a1465b51ddd53f9ef72b2c530e762659e05fe3649c0fcb74234", kill_on_drop: false }`
[INFO] [stdout] b3df00a5ac6d8a1465b51ddd53f9ef72b2c530e762659e05fe3649c0fcb74234
