[INFO] fetching crate sp-im 0.3.0...
[INFO] checking sp-im-0.3.0 against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] extracting crate sp-im 0.3.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate sp-im 0.3.0
[INFO] finished tweaking crates.io crate sp-im 0.3.0
[INFO] tweaked toml for crates.io crate sp-im 0.3.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sp-im 0.3.0 on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 99 packages to latest compatible versions
[INFO] [stderr]       Adding pretty_assertions v0.6.1 (available: v1.4.1)
[INFO] [stderr]       Adding proptest v0.5.1 (available: v1.11.0)
[INFO] [stderr]       Adding rand v0.8.6 (available: v0.10.1)
[INFO] [stderr]       Adding rand_core v0.5.1 (available: v0.10.1)
[INFO] [stderr]       Adding rand_xoshiro v0.4.0 (available: v0.8.0)
[INFO] [stderr]       Adding spin v0.9.8 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "fetch" "--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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2e13553bb2f88e106658907bc525d91cdcb3bab67672a294495f2001a3c60fa5
[INFO] running `Command { std: "docker" "start" "-a" "2e13553bb2f88e106658907bc525d91cdcb3bab67672a294495f2001a3c60fa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e13553bb2f88e106658907bc525d91cdcb3bab67672a294495f2001a3c60fa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e13553bb2f88e106658907bc525d91cdcb3bab67672a294495f2001a3c60fa5", kill_on_drop: false }`
[INFO] [stdout] 2e13553bb2f88e106658907bc525d91cdcb3bab67672a294495f2001a3c60fa5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28cf2da5961735a1b4a7d5edeed34b83d00a7132972bb4412fc23df280af297d
[INFO] running `Command { std: "docker" "start" "-a" "28cf2da5961735a1b4a7d5edeed34b83d00a7132972bb4412fc23df280af297d", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]     Checking rand_core v0.10.1
[INFO] [stderr]     Checking bitmaps v3.2.1
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.2
[INFO] [stderr]     Checking either v1.15.0
[INFO] [stderr]     Checking rand v0.8.6
[INFO] [stderr]     Checking metrohash v1.0.7
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking bit-set v0.4.0
[INFO] [stderr]     Checking rand v0.10.1
[INFO] [stderr]     Checking rayon v1.12.0
[INFO] [stderr]     Checking sp-sized-chunks v0.1.0
[INFO] [stderr]     Checking proptest v0.5.1
[INFO] [stderr]     Checking sp-im v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/lib.rs:335:13
[INFO] [stdout]     |
[INFO] [stdout] 335 | #![cfg_attr(has_specialisation, feature(specialization))]
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `docsrs`, `feature`, and `test` and 32 more
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]    --> src/lib.rs:378:11
[INFO] [stdout]     |
[INFO] [stdout] 378 | #[cfg(all(threadsafe))]
[INFO] [stdout]     |           ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]    --> src/lib.rs:386:11
[INFO] [stdout]     |
[INFO] [stdout] 386 | #[cfg(any(threadsafe, not(feature = "pool")))]
[INFO] [stdout]     |           ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/lib.rs:386:27
[INFO] [stdout]     |
[INFO] [stdout] 386 | #[cfg(any(threadsafe, not(feature = "pool")))]
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/nodes/btree.rs:60:7
[INFO] [stdout]    |
[INFO] [stdout] 60 | #[cfg(feature = "pool")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/nodes/btree.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |   #[cfg(feature = "pool")]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/nodes/btree.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 81 |   #[cfg(feature = "pool")]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/util.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | #[cfg(feature = "pool")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:27:11
[INFO] [stdout]    |
[INFO] [stdout] 27 | #[cfg(all(threadsafe))]
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 | #[cfg(threadsafe)]
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:40:15
[INFO] [stdout]    |
[INFO] [stdout] 40 | #[cfg(all(not(threadsafe), not(feature = "pool")))]
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/util.rs:40:32
[INFO] [stdout]    |
[INFO] [stdout] 40 | #[cfg(all(not(threadsafe), not(feature = "pool")))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:49:15
[INFO] [stdout]    |
[INFO] [stdout] 49 | #[cfg(all(not(threadsafe), feature = "pool"))]
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/util.rs:49:28
[INFO] [stdout]    |
[INFO] [stdout] 49 | #[cfg(all(not(threadsafe), feature = "pool"))]
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:51:15
[INFO] [stdout]    |
[INFO] [stdout] 51 | #[cfg(all(not(threadsafe), feature = "pool"))]
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/util.rs:51:28
[INFO] [stdout]    |
[INFO] [stdout] 51 | #[cfg(all(not(threadsafe), feature = "pool"))]
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:55:11
[INFO] [stdout]    |
[INFO] [stdout] 55 | #[cfg(not(threadsafe))]
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]   --> src/ord/map.rs:57:7
[INFO] [stdout]    |
[INFO] [stdout] 57 | #[cfg(has_specialisation)]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/map.rs:110:11
[INFO] [stdout]     |
[INFO] [stdout] 110 | #[cfg(not(has_specialisation))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/map.rs:137:7
[INFO] [stdout]     |
[INFO] [stdout] 137 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/map.rs:164:7
[INFO] [stdout]     |
[INFO] [stdout] 164 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/ord/map.rs:1585:11
[INFO] [stdout]      |
[INFO] [stdout] 1585 | #[cfg(not(has_specialisation))]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/ord/map.rs:1596:7
[INFO] [stdout]      |
[INFO] [stdout] 1596 | #[cfg(has_specialisation)]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/ord/map.rs:1607:7
[INFO] [stdout]      |
[INFO] [stdout] 1607 | #[cfg(has_specialisation)]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/ord/map.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |   #[cfg(feature = "pool")]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/ord/map.rs:290:9
[INFO] [stdout]     |
[INFO] [stdout] 290 |   #[cfg(feature = "pool")]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]   --> src/ord/set.rs:53:7
[INFO] [stdout]    |
[INFO] [stdout] 53 | #[cfg(has_specialisation)]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/set.rs:108:11
[INFO] [stdout]     |
[INFO] [stdout] 108 | #[cfg(not(has_specialisation))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/set.rs:135:7
[INFO] [stdout]     |
[INFO] [stdout] 135 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/set.rs:162:7
[INFO] [stdout]     |
[INFO] [stdout] 162 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/ord/set.rs:208:9
[INFO] [stdout]     |
[INFO] [stdout] 208 |   #[cfg(feature = "pool")]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/ord/set.rs:281:9
[INFO] [stdout]     |
[INFO] [stdout] 281 |   #[cfg(feature = "pool")]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]    --> src/vector.rs:126:11
[INFO] [stdout]     |
[INFO] [stdout] 126 | #[cfg(all(threadsafe, any(test, feature = "rayon")))]
[INFO] [stdout]     |           ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/vector.rs:1747:11
[INFO] [stdout]      |
[INFO] [stdout] 1747 | #[cfg(not(has_specialisation))]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/vector.rs:1754:7
[INFO] [stdout]      |
[INFO] [stdout] 1754 | #[cfg(has_specialisation)]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/vector.rs:1761:7
[INFO] [stdout]      |
[INFO] [stdout] 1761 | #[cfg(has_specialisation)]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]    --> src/vector/focus.rs:297:7
[INFO] [stdout]     |
[INFO] [stdout] 297 | #[cfg(threadsafe)]
[INFO] [stdout]     |       ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]    --> src/vector/focus.rs:300:7
[INFO] [stdout]     |
[INFO] [stdout] 300 | #[cfg(threadsafe)]
[INFO] [stdout]     |       ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/vector.rs:237:18
[INFO] [stdout]     |
[INFO] [stdout] 237 |   #[cfg_attr(not(feature = "pool"), doc = "hidden")]
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/vector.rs:317:9
[INFO] [stdout]     |
[INFO] [stdout] 317 |   #[cfg(feature = "pool")]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/conslist.rs:541:11
[INFO] [stdout]     |
[INFO] [stdout] 541 | #[cfg(not(has_specialisation))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/conslist.rs:558:7
[INFO] [stdout]     |
[INFO] [stdout] 558 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/conslist.rs:579:7
[INFO] [stdout]     |
[INFO] [stdout] 579 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `quickcheck`
[INFO] [stdout]    --> src/conslist.rs:738:17
[INFO] [stdout]     |
[INFO] [stdout] 738 | #[cfg(any(test, feature = "quickcheck"))]
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `quickcheck` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/nodes/btree.rs:236:67
[INFO] [stdout]     |
[INFO] [stdout] 236 |   pub(crate) fn lookup_prev<'a, BK>(&'a self, key: &BK) -> Option<&A>
[INFO] [stdout]     |                                      --                           ^^ the same lifetime is elided here
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      the lifetime is named 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: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 236 |   pub(crate) fn lookup_prev<'a, BK>(&'a self, key: &BK) -> Option<&'a A>
[INFO] [stdout]     |                                                                    ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/nodes/btree.rs:256:67
[INFO] [stdout]     |
[INFO] [stdout] 256 |   pub(crate) fn lookup_next<'a, BK>(&'a self, key: &BK) -> Option<&A>
[INFO] [stdout]     |                                      --                           ^^ the same lifetime is elided here
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 256 |   pub(crate) fn lookup_next<'a, BK>(&'a self, key: &BK) -> Option<&'a A>
[INFO] [stdout]     |                                                                    ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/nodes/btree.rs:279:15
[INFO] [stdout]     |
[INFO] [stdout] 276 |     &'a mut self,
[INFO] [stdout]     |      -- the lifetime is named here
[INFO] [stdout] ...
[INFO] [stdout] 279 |   ) -> Option<&mut A>
[INFO] [stdout]     |               ^^^^^^ the same lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 279 |   ) -> Option<&'a mut A>
[INFO] [stdout]     |                ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/nodes/btree.rs:307:15
[INFO] [stdout]     |
[INFO] [stdout] 304 |     &'a mut self,
[INFO] [stdout]     |      -- the lifetime is named here
[INFO] [stdout] ...
[INFO] [stdout] 307 |   ) -> Option<&mut A>
[INFO] [stdout]     |               ^^^^^^ the same lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 307 |   ) -> Option<&'a mut A>
[INFO] [stdout]     |                ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/ord/set.rs:355:58
[INFO] [stdout]     |
[INFO] [stdout] 355 |   pub fn diff<'a>(&'a self, other: &'a Self) -> DiffIter<'_, A> {
[INFO] [stdout]     |                    --               --                   ^^ the same lifetime is elided here
[INFO] [stdout]     |                    |                |
[INFO] [stdout]     |                    |                the lifetime is named here
[INFO] [stdout]     |                    the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 355 -   pub fn diff<'a>(&'a self, other: &'a Self) -> DiffIter<'_, A> {
[INFO] [stdout] 355 +   pub fn diff<'a>(&'a self, other: &'a Self) -> DiffIter<'a, A> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/ord/map.rs:143:3
[INFO] [stdout]     |
[INFO] [stdout] 143 |   default fn search_key<BK>(slice: &[Self], key: &BK) -> Result<usize, usize>
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/ord/map.rs:150:3
[INFO] [stdout]     |
[INFO] [stdout] 150 |   default fn search_value(slice: &[Self], key: &Self) -> Result<usize, usize> {
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/ord/map.rs:1602:3
[INFO] [stdout]      |
[INFO] [stdout] 1602 |   default fn eq(&self, other: &Self) -> bool {
[INFO] [stdout]      |   ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]      = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/ord/set.rs:141:3
[INFO] [stdout]     |
[INFO] [stdout] 141 |   default fn search_key<BK>(slice: &[Self], key: &BK) -> Result<usize, usize>
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/ord/set.rs:148:3
[INFO] [stdout]     |
[INFO] [stdout] 148 |   default fn search_value(slice: &[Self], key: &Self) -> Result<usize, usize> {
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/vector.rs:1756:3
[INFO] [stdout]      |
[INFO] [stdout] 1756 |   default fn eq(&self, other: &Self) -> bool {
[INFO] [stdout]      |   ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]      = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/conslist.rs:574:3
[INFO] [stdout]     |
[INFO] [stdout] 574 |   default fn eq(&self, other: &ConsList<A>) -> bool {
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex v1.12.3
[INFO] [stderr]     Checking env_filter v1.0.1
[INFO] [stderr]     Checking env_logger v0.11.10
[INFO] [stderr]     Checking quickcheck v1.1.0
[INFO] [stderr]    Compiling derive_arbitrary v1.4.2
[INFO] [stderr]    Compiling quickcheck_macros v1.2.0
[INFO] [stderr]     Checking arbitrary v1.4.2
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> benches/ordmap.rs:107:7
[INFO] [stdout]     |
[INFO] [stdout] 107 | #[cfg(feature = "pool")]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> benches/ordmap.rs:120:7
[INFO] [stdout]     |
[INFO] [stdout] 120 | #[cfg(feature = "pool")]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> benches/ordmap.rs:126:7
[INFO] [stdout]     |
[INFO] [stdout] 126 | #[cfg(feature = "pool")]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> benches/ordmap.rs:132:7
[INFO] [stdout]     |
[INFO] [stdout] 132 | #[cfg(feature = "pool")]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> benches/ordmap.rs:138:7
[INFO] [stdout]     |
[INFO] [stdout] 138 | #[cfg(feature = "pool")]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/lib.rs:335:13
[INFO] [stdout]     |
[INFO] [stdout] 335 | #![cfg_attr(has_specialisation, feature(specialization))]
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `docsrs`, `feature`, and `test` and 32 more
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]    --> src/lib.rs:378:11
[INFO] [stdout]     |
[INFO] [stdout] 378 | #[cfg(all(threadsafe))]
[INFO] [stdout]     |           ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]    --> src/lib.rs:386:11
[INFO] [stdout]     |
[INFO] [stdout] 386 | #[cfg(any(threadsafe, not(feature = "pool")))]
[INFO] [stdout]     |           ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/lib.rs:386:27
[INFO] [stdout]     |
[INFO] [stdout] 386 | #[cfg(any(threadsafe, not(feature = "pool")))]
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/nodes/btree.rs:60:7
[INFO] [stdout]    |
[INFO] [stdout] 60 | #[cfg(feature = "pool")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/nodes/btree.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |   #[cfg(feature = "pool")]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/nodes/btree.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 81 |   #[cfg(feature = "pool")]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/util.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | #[cfg(feature = "pool")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:27:11
[INFO] [stdout]    |
[INFO] [stdout] 27 | #[cfg(all(threadsafe))]
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 | #[cfg(threadsafe)]
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:40:15
[INFO] [stdout]    |
[INFO] [stdout] 40 | #[cfg(all(not(threadsafe), not(feature = "pool")))]
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/util.rs:40:32
[INFO] [stdout]    |
[INFO] [stdout] 40 | #[cfg(all(not(threadsafe), not(feature = "pool")))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:49:15
[INFO] [stdout]    |
[INFO] [stdout] 49 | #[cfg(all(not(threadsafe), feature = "pool"))]
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/util.rs:49:28
[INFO] [stdout]    |
[INFO] [stdout] 49 | #[cfg(all(not(threadsafe), feature = "pool"))]
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:51:15
[INFO] [stdout]    |
[INFO] [stdout] 51 | #[cfg(all(not(threadsafe), feature = "pool"))]
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]   --> src/util.rs:51:28
[INFO] [stdout]    |
[INFO] [stdout] 51 | #[cfg(all(not(threadsafe), feature = "pool"))]
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]    = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]   --> src/util.rs:55:11
[INFO] [stdout]    |
[INFO] [stdout] 55 | #[cfg(not(threadsafe))]
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]   --> src/ord/map.rs:57:7
[INFO] [stdout]    |
[INFO] [stdout] 57 | #[cfg(has_specialisation)]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/map.rs:110:11
[INFO] [stdout]     |
[INFO] [stdout] 110 | #[cfg(not(has_specialisation))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/map.rs:137:7
[INFO] [stdout]     |
[INFO] [stdout] 137 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/map.rs:164:7
[INFO] [stdout]     |
[INFO] [stdout] 164 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/ord/map.rs:1585:11
[INFO] [stdout]      |
[INFO] [stdout] 1585 | #[cfg(not(has_specialisation))]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/ord/map.rs:1596:7
[INFO] [stdout]      |
[INFO] [stdout] 1596 | #[cfg(has_specialisation)]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/ord/map.rs:1607:7
[INFO] [stdout]      |
[INFO] [stdout] 1607 | #[cfg(has_specialisation)]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/ord/map.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |   #[cfg(feature = "pool")]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/ord/map.rs:290:9
[INFO] [stdout]     |
[INFO] [stdout] 290 |   #[cfg(feature = "pool")]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]   --> src/ord/set.rs:53:7
[INFO] [stdout]    |
[INFO] [stdout] 53 | #[cfg(has_specialisation)]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/set.rs:108:11
[INFO] [stdout]     |
[INFO] [stdout] 108 | #[cfg(not(has_specialisation))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/set.rs:135:7
[INFO] [stdout]     |
[INFO] [stdout] 135 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/ord/set.rs:162:7
[INFO] [stdout]     |
[INFO] [stdout] 162 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/ord/set.rs:208:9
[INFO] [stdout]     |
[INFO] [stdout] 208 |   #[cfg(feature = "pool")]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/ord/set.rs:281:9
[INFO] [stdout]     |
[INFO] [stdout] 281 |   #[cfg(feature = "pool")]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]    --> src/vector.rs:126:11
[INFO] [stdout]     |
[INFO] [stdout] 126 | #[cfg(all(threadsafe, any(test, feature = "rayon")))]
[INFO] [stdout]     |           ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/vector.rs:1747:11
[INFO] [stdout]      |
[INFO] [stdout] 1747 | #[cfg(not(has_specialisation))]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/vector.rs:1754:7
[INFO] [stdout]      |
[INFO] [stdout] 1754 | #[cfg(has_specialisation)]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]     --> src/vector.rs:1761:7
[INFO] [stdout]      |
[INFO] [stdout] 1761 | #[cfg(has_specialisation)]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider using a Cargo feature instead
[INFO] [stdout]      = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]               [lints.rust]
[INFO] [stdout]               unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]      = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]    --> src/vector/focus.rs:297:7
[INFO] [stdout]     |
[INFO] [stdout] 297 | #[cfg(threadsafe)]
[INFO] [stdout]     |       ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `threadsafe`
[INFO] [stdout]    --> src/vector/focus.rs:300:7
[INFO] [stdout]     |
[INFO] [stdout] 300 | #[cfg(threadsafe)]
[INFO] [stdout]     |       ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(threadsafe)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(threadsafe)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/vector.rs:237:18
[INFO] [stdout]     |
[INFO] [stdout] 237 |   #[cfg_attr(not(feature = "pool"), doc = "hidden")]
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `pool`
[INFO] [stdout]    --> src/vector.rs:317:9
[INFO] [stdout]     |
[INFO] [stdout] 317 |   #[cfg(feature = "pool")]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `pool` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/conslist.rs:541:11
[INFO] [stdout]     |
[INFO] [stdout] 541 | #[cfg(not(has_specialisation))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/conslist.rs:558:7
[INFO] [stdout]     |
[INFO] [stdout] 558 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_specialisation`
[INFO] [stdout]    --> src/conslist.rs:579:7
[INFO] [stdout]     |
[INFO] [stdout] 579 | #[cfg(has_specialisation)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(has_specialisation)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(has_specialisation)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `quickcheck`
[INFO] [stdout]    --> src/conslist.rs:738:17
[INFO] [stdout]     |
[INFO] [stdout] 738 | #[cfg(any(test, feature = "quickcheck"))]
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `debug`, `rayon`, `refpool`, `serde`, and `std`
[INFO] [stdout]     = help: consider adding `quickcheck` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `arbitrary::size_hint::recursion_guard`: use `try_recursion_guard` instead
[INFO] [stdout]   --> src/arbitrary.rs:63:16
[INFO] [stdout]    |
[INFO] [stdout] 63 |     size_hint::recursion_guard(depth, |depth| {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `arbitrary::size_hint::recursion_guard`: use `try_recursion_guard` instead
[INFO] [stdout]   --> src/arbitrary.rs:86:16
[INFO] [stdout]    |
[INFO] [stdout] 86 |     size_hint::recursion_guard(depth, |depth| {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `arbitrary::size_hint::recursion_guard`: use `try_recursion_guard` instead
[INFO] [stdout]    --> src/arbitrary.rs:109:16
[INFO] [stdout]     |
[INFO] [stdout] 109 |     size_hint::recursion_guard(depth, |depth| {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LolHasher` is never constructed
[INFO] [stdout]   --> src/test.rs:29:19
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub(crate) struct LolHasher<N: Unsigned = U64> {
[INFO] [stdout]    |                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `feed_me` is never used
[INFO] [stdout]   --> src/test.rs:36:6
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl<N: Unsigned> LolHasher<N> {
[INFO] [stdout]    | ------------------------------ method in this implementation
[INFO] [stdout] 36 |   fn feed_me(&mut self, byte: u8) {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/nodes/btree.rs:236:67
[INFO] [stdout]     |
[INFO] [stdout] 236 |   pub(crate) fn lookup_prev<'a, BK>(&'a self, key: &BK) -> Option<&A>
[INFO] [stdout]     |                                      --                           ^^ the same lifetime is elided here
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      the lifetime is named 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: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 236 |   pub(crate) fn lookup_prev<'a, BK>(&'a self, key: &BK) -> Option<&'a A>
[INFO] [stdout]     |                                                                    ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/nodes/btree.rs:256:67
[INFO] [stdout]     |
[INFO] [stdout] 256 |   pub(crate) fn lookup_next<'a, BK>(&'a self, key: &BK) -> Option<&A>
[INFO] [stdout]     |                                      --                           ^^ the same lifetime is elided here
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 256 |   pub(crate) fn lookup_next<'a, BK>(&'a self, key: &BK) -> Option<&'a A>
[INFO] [stdout]     |                                                                    ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/nodes/btree.rs:279:15
[INFO] [stdout]     |
[INFO] [stdout] 276 |     &'a mut self,
[INFO] [stdout]     |      -- the lifetime is named here
[INFO] [stdout] ...
[INFO] [stdout] 279 |   ) -> Option<&mut A>
[INFO] [stdout]     |               ^^^^^^ the same lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 279 |   ) -> Option<&'a mut A>
[INFO] [stdout]     |                ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/nodes/btree.rs:307:15
[INFO] [stdout]     |
[INFO] [stdout] 304 |     &'a mut self,
[INFO] [stdout]     |      -- the lifetime is named here
[INFO] [stdout] ...
[INFO] [stdout] 307 |   ) -> Option<&mut A>
[INFO] [stdout]     |               ^^^^^^ the same lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 307 |   ) -> Option<&'a mut A>
[INFO] [stdout]     |                ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/ord/set.rs:355:58
[INFO] [stdout]     |
[INFO] [stdout] 355 |   pub fn diff<'a>(&'a self, other: &'a Self) -> DiffIter<'_, A> {
[INFO] [stdout]     |                    --               --                   ^^ the same lifetime is elided here
[INFO] [stdout]     |                    |                |
[INFO] [stdout]     |                    |                the lifetime is named here
[INFO] [stdout]     |                    the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 355 -   pub fn diff<'a>(&'a self, other: &'a Self) -> DiffIter<'_, A> {
[INFO] [stdout] 355 +   pub fn diff<'a>(&'a self, other: &'a Self) -> DiffIter<'a, A> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/ser.rs:156:28
[INFO] [stdout]     |
[INFO] [stdout] 156 |       s.serialize_element(i.deref())?;
[INFO] [stdout]     |                            ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `A` does not implement `Deref`, so calling `deref` on `&A` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/ser.rs:180:26
[INFO] [stdout]     |
[INFO] [stdout] 180 |       s.serialize_entry(k.deref(), v.deref())?;
[INFO] [stdout]     |                          ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `K` does not implement `Deref`, so calling `deref` on `&K` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/ser.rs:180:37
[INFO] [stdout]     |
[INFO] [stdout] 180 |       s.serialize_entry(k.deref(), v.deref())?;
[INFO] [stdout]     |                                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `V` does not implement `Deref`, so calling `deref` on `&V` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/ser.rs:254:28
[INFO] [stdout]     |
[INFO] [stdout] 254 |       s.serialize_element(i.deref())?;
[INFO] [stdout]     |                            ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `A` does not implement `Deref`, so calling `deref` on `&A` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/ord/map.rs:143:3
[INFO] [stdout]     |
[INFO] [stdout] 143 |   default fn search_key<BK>(slice: &[Self], key: &BK) -> Result<usize, usize>
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/ord/map.rs:150:3
[INFO] [stdout]     |
[INFO] [stdout] 150 |   default fn search_value(slice: &[Self], key: &Self) -> Result<usize, usize> {
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/ord/map.rs:1602:3
[INFO] [stdout]      |
[INFO] [stdout] 1602 |   default fn eq(&self, other: &Self) -> bool {
[INFO] [stdout]      |   ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]      = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/ord/set.rs:141:3
[INFO] [stdout]     |
[INFO] [stdout] 141 |   default fn search_key<BK>(slice: &[Self], key: &BK) -> Result<usize, usize>
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/ord/set.rs:148:3
[INFO] [stdout]     |
[INFO] [stdout] 148 |   default fn search_value(slice: &[Self], key: &Self) -> Result<usize, usize> {
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/vector.rs:1756:3
[INFO] [stdout]      |
[INFO] [stdout] 1756 |   default fn eq(&self, other: &Self) -> bool {
[INFO] [stdout]      |   ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]      = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/conslist.rs:574:3
[INFO] [stdout]     |
[INFO] [stdout] 574 |   default fn eq(&self, other: &ConsList<A>) -> bool {
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2026-05-02; consider upgrading it if it is out of date
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.51s
[INFO] running `Command { std: "docker" "inspect" "28cf2da5961735a1b4a7d5edeed34b83d00a7132972bb4412fc23df280af297d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28cf2da5961735a1b4a7d5edeed34b83d00a7132972bb4412fc23df280af297d", kill_on_drop: false }`
[INFO] [stdout] 28cf2da5961735a1b4a7d5edeed34b83d00a7132972bb4412fc23df280af297d
