[INFO] fetching crate slice-ring-buffer 0.3.4...
[INFO] testing slice-ring-buffer-0.3.4 against master#ec6f9a5b4413f74386267ef8efc93712c2ce6db6 for pr-155739-1
[INFO] extracting crate slice-ring-buffer 0.3.4 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate slice-ring-buffer 0.3.4
[INFO] finished tweaking crates.io crate slice-ring-buffer 0.3.4
[INFO] tweaked toml for crates.io crate slice-ring-buffer 0.3.4 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate slice-ring-buffer 0.3.4 on toolchain ec6f9a5b4413f74386267ef8efc93712c2ce6db6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding mach2 v0.4.3 (available: v0.6.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Found `feature = ...` in `target.'cfg(...)'.dependencies`. This key is not supported for selecting dependencies and will not work as expected. Use the [features] section instead: https://doc.rust-lang.org/cargo/reference/features.html
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 119c6f376864843c05e609e84a0331b8cd78c9b45271729665ad7ab679fdf6df
[INFO] running `Command { std: "docker" "start" "-a" "119c6f376864843c05e609e84a0331b8cd78c9b45271729665ad7ab679fdf6df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "119c6f376864843c05e609e84a0331b8cd78c9b45271729665ad7ab679fdf6df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "119c6f376864843c05e609e84a0331b8cd78c9b45271729665ad7ab679fdf6df", kill_on_drop: false }`
[INFO] [stdout] 119c6f376864843c05e609e84a0331b8cd78c9b45271729665ad7ab679fdf6df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43ec7190db7a6ff6a3f7297bff491c5fd5e97be60d6bd4f49999d10b243f052a
[INFO] running `Command { std: "docker" "start" "-a" "43ec7190db7a6ff6a3f7297bff491c5fd5e97be60d6bd4f49999d10b243f052a", kill_on_drop: false }`
[INFO] [stderr] warning: Found `feature = ...` in `target.'cfg(...)'.dependencies`. This key is not supported for selecting dependencies and will not work as expected. Use the [features] section instead: https://doc.rust-lang.org/cargo/reference/features.html
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling slice-ring-buffer v0.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]    --> src/lib.rs:122:5
[INFO] [stdout]     |
[INFO] [stdout] 122 |     feature = "unstable",
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]     = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]    --> src/lib.rs:132:23
[INFO] [stdout]     |
[INFO] [stdout] 132 | #![cfg_attr(all(test, feature = "unstable"), feature(box_syntax))]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]     = help: consider adding `unstable` 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: `bytes_buf`
[INFO] [stdout]    --> src/lib.rs:162:11
[INFO] [stdout]     |
[INFO] [stdout] 162 | #[cfg(all(feature = "bytes_buf", feature = "use_std"))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]     = help: consider adding `bytes_buf` 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: `bytes_buf`
[INFO] [stdout]    --> src/lib.rs:168:11
[INFO] [stdout]     |
[INFO] [stdout] 168 | #[cfg(all(feature = "bytes_buf", feature = "use_std"))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]     = help: consider adding `bytes_buf` 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: `unstable`
[INFO] [stdout]    --> src/lib.rs:175:7
[INFO] [stdout]     |
[INFO] [stdout] 175 | #[cfg(feature = "unstable")]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]     = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]    --> src/lib.rs:179:11
[INFO] [stdout]     |
[INFO] [stdout] 179 | #[cfg(not(feature = "unstable"))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]     = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]    --> src/lib.rs:212:11
[INFO] [stdout]     |
[INFO] [stdout] 212 | #[cfg(not(feature = "unstable"))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]     = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]    --> src/lib.rs:229:7
[INFO] [stdout]     |
[INFO] [stdout] 229 | #[cfg(feature = "unstable")]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]     = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2263:7
[INFO] [stdout]      |
[INFO] [stdout] 2263 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2271:7
[INFO] [stdout]      |
[INFO] [stdout] 2271 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2425:7
[INFO] [stdout]      |
[INFO] [stdout] 2425 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2433:7
[INFO] [stdout]      |
[INFO] [stdout] 2433 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2436:7
[INFO] [stdout]      |
[INFO] [stdout] 2436 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2450:7
[INFO] [stdout]      |
[INFO] [stdout] 2450 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2463:11
[INFO] [stdout]      |
[INFO] [stdout] 2463 | #[cfg(not(feature = "unstable"))]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2617:7
[INFO] [stdout]      |
[INFO] [stdout] 2617 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2658:7
[INFO] [stdout]      |
[INFO] [stdout] 2658 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2690:11
[INFO] [stdout]      |
[INFO] [stdout] 2690 | #[cfg(not(feature = "unstable"))]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2705:7
[INFO] [stdout]      |
[INFO] [stdout] 2705 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2720:7
[INFO] [stdout]      |
[INFO] [stdout] 2720 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2801:7
[INFO] [stdout]      |
[INFO] [stdout] 2801 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2832:7
[INFO] [stdout]      |
[INFO] [stdout] 2832 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2839:7
[INFO] [stdout]      |
[INFO] [stdout] 2839 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2893:7
[INFO] [stdout]      |
[INFO] [stdout] 2893 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2897:7
[INFO] [stdout]      |
[INFO] [stdout] 2897 | #[cfg(feature = "unstable")]
[INFO] [stdout]      |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `bytes_buf`
[INFO] [stdout]     --> src/lib.rs:3075:11
[INFO] [stdout]      |
[INFO] [stdout] 3075 | #[cfg(all(feature = "bytes_buf", feature = "use_std"))]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `bytes_buf` 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: `bytes_buf`
[INFO] [stdout]     --> src/lib.rs:3107:11
[INFO] [stdout]      |
[INFO] [stdout] 3107 | #[cfg(all(feature = "bytes_buf", feature = "use_std"))]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `bytes_buf` 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: `bytes_buf`
[INFO] [stdout]     --> src/lib.rs:3116:11
[INFO] [stdout]      |
[INFO] [stdout] 3116 | #[cfg(all(feature = "bytes_buf", feature = "use_std"))]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `bytes_buf` 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: `bytes_buf`
[INFO] [stdout]     --> src/lib.rs:3125:11
[INFO] [stdout]      |
[INFO] [stdout] 3125 | #[cfg(all(feature = "bytes_buf", feature = "use_std"))]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `bytes_buf` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2828 | impl_spec_from_elem!(i8, |x| x == 0);
[INFO] [stdout]      | ------------------------------------ in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2829 | impl_spec_from_elem!(i16, |x| x == 0);
[INFO] [stdout]      | ------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2830 | impl_spec_from_elem!(i32, |x| x == 0);
[INFO] [stdout]      | ------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2831 | impl_spec_from_elem!(i64, |x| x == 0);
[INFO] [stdout]      | ------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2834 | impl_spec_from_elem!(isize, |x| x == 0);
[INFO] [stdout]      | --------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2836 | impl_spec_from_elem!(u16, |x| x == 0);
[INFO] [stdout]      | ------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2837 | impl_spec_from_elem!(u32, |x| x == 0);
[INFO] [stdout]      | ------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2838 | impl_spec_from_elem!(u64, |x| x == 0);
[INFO] [stdout]      | ------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2841 | impl_spec_from_elem!(usize, |x| x == 0);
[INFO] [stdout]      | --------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2843 | impl_spec_from_elem!(f32, |x: f32| x == 0. && x.is_sign_positive());
[INFO] [stdout]      | ------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:2816:15
[INFO] [stdout]      |
[INFO] [stdout] 2816 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 2844 | impl_spec_from_elem!(f64, |x: f64| x == 0. && x.is_sign_positive());
[INFO] [stdout]      | ------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: this warning originates in the macro `impl_spec_from_elem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable`
[INFO] [stdout]     --> src/lib.rs:1885:15
[INFO] [stdout]      |
[INFO] [stdout] 1885 |         #[cfg(feature = "unstable")]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:1889:19
[INFO] [stdout]      |
[INFO] [stdout] 1889 |         #[cfg(not(feature = "unstable"))]
[INFO] [stdout]      |                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2300:11
[INFO] [stdout]      |
[INFO] [stdout] 2300 |     #[cfg(feature = "unstable")]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2596:11
[INFO] [stdout]      |
[INFO] [stdout] 2596 |     #[cfg(feature = "unstable")]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2601:11
[INFO] [stdout]      |
[INFO] [stdout] 2601 |     #[cfg(feature = "unstable")]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2606:15
[INFO] [stdout]      |
[INFO] [stdout] 2606 |     #[cfg(not(feature = "unstable"))]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2611:15
[INFO] [stdout]      |
[INFO] [stdout] 2611 |     #[cfg(not(feature = "unstable"))]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2786:11
[INFO] [stdout]      |
[INFO] [stdout] 2786 |     #[cfg(feature = "unstable")]
[INFO] [stdout]      |           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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: `unstable`
[INFO] [stdout]     --> src/lib.rs:2793:15
[INFO] [stdout]      |
[INFO] [stdout] 2793 |     #[cfg(not(feature = "unstable"))]
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: expected values for `feature` are: `default`, `unix_sysv`, and `use_std`
[INFO] [stdout]      = help: consider adding `unstable` 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] error: implicit autoref creates a reference to the dereference of a raw pointer
[INFO] [stdout]    --> src/lib.rs:779:21
[INFO] [stdout]     |
[INFO] [stdout] 779 |         let count = (*other).len();
[INFO] [stdout]     |                     ^^-----^^^^^^^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       this raw pointer has type `*const [T]`
[INFO] [stdout]     |
[INFO] [stdout]     = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements
[INFO] [stdout] note: autoref is being applied to this expression, resulting in: `&[T]`
[INFO] [stdout]    --> src/lib.rs:779:21
[INFO] [stdout]     |
[INFO] [stdout] 779 |         let count = (*other).len();
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout] note: method calls to `len` require a reference
[INFO] [stdout]    --> /rustc/ec6f9a5b4413f74386267ef8efc93712c2ce6db6/library/core/src/slice/mod.rs:116:4
[INFO] [stdout]     = note: `#[deny(dangerous_implicit_autorefs)]` on by default
[INFO] [stdout] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit
[INFO] [stdout]     |
[INFO] [stdout] 779 |         let count = (&(*other)).len();
[INFO] [stdout]     |                     ++        +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/lib.rs:1219:21
[INFO] [stdout]      |
[INFO] [stdout] 1219 |     pub fn drain<R>(&mut self, range: R) -> Drain<T>
[INFO] [stdout]      |                     ^^^^^^^^^               ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                     |
[INFO] [stdout]      |                     the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]      = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1219 |     pub fn drain<R>(&mut self, range: R) -> Drain<'_, T>
[INFO] [stdout]      |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/lib.rs:1767:9
[INFO] [stdout]      |
[INFO] [stdout] 1767 |         &mut self, range: R, replace_with: I,
[INFO] [stdout]      |         ^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] 1768 |     ) -> Splice<I::IntoIter>
[INFO] [stdout]      |          ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1768 |     ) -> Splice<'_, I::IntoIter>
[INFO] [stdout]      |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/lib.rs:1839:28
[INFO] [stdout]      |
[INFO] [stdout] 1839 |     pub fn drain_filter<F>(&mut self, filter: F) -> DrainFilter<T, F>
[INFO] [stdout]      |                            ^^^^^^^^^                ^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                            |
[INFO] [stdout]      |                            the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1839 |     pub fn drain_filter<F>(&mut self, filter: F) -> DrainFilter<'_, T, F>
[INFO] [stdout]      |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/lib.rs:2597:5
[INFO] [stdout]      |
[INFO] [stdout] 2597 |     default fn from_iter(iterator: I) -> Self {
[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 2026-04-24; 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/lib.rs:2602:5
[INFO] [stdout]      |
[INFO] [stdout] 2602 |     default fn spec_extend(&mut self, iter: I) {
[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 2026-04-24; 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/lib.rs:2622:5
[INFO] [stdout]      |
[INFO] [stdout] 2622 |     default fn from_iter(iterator: I) -> Self {
[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 2026-04-24; 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/lib.rs:2629:5
[INFO] [stdout]      |
[INFO] [stdout] 2629 |     default fn spec_extend(&mut self, iterator: I) {
[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 2026-04-24; 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/lib.rs:2711:5
[INFO] [stdout]      |
[INFO] [stdout] 2711 |     default fn from_iter(iterator: I) -> Self {
[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 2026-04-24; 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/lib.rs:2715:5
[INFO] [stdout]      |
[INFO] [stdout] 2715 |     default fn spec_extend(&mut self, iterator: I) {
[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 2026-04-24; 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/lib.rs:2787:5
[INFO] [stdout]      |
[INFO] [stdout] 2787 |     default fn from_elem(elem: Self, n: usize) -> SliceRingBuffer<Self> {
[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 2026-04-24; 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] error: could not compile `slice-ring-buffer` (lib) due to 1 previous error; 59 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "43ec7190db7a6ff6a3f7297bff491c5fd5e97be60d6bd4f49999d10b243f052a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43ec7190db7a6ff6a3f7297bff491c5fd5e97be60d6bd4f49999d10b243f052a", kill_on_drop: false }`
[INFO] [stdout] 43ec7190db7a6ff6a3f7297bff491c5fd5e97be60d6bd4f49999d10b243f052a
