[INFO] fetching crate hypermangle-core 0.6.3...
[INFO] documenting hypermangle-core-0.6.3 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate hypermangle-core 0.6.3 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate hypermangle-core 0.6.3 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hypermangle-core 0.6.3
[INFO] finished tweaking crates.io crate hypermangle-core 0.6.3
[INFO] tweaked toml for crates.io crate hypermangle-core 0.6.3 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spinning v0.1.0
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[INFO] [stderr]   Downloaded hypermangle-py v0.2.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8a3d41b749f2388264eeeb0e8028773e8ca0e16288158ee5cd931c8b1114584
[INFO] running `Command { std: "docker" "start" "-a" "a8a3d41b749f2388264eeeb0e8028773e8ca0e16288158ee5cd931c8b1114584", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8a3d41b749f2388264eeeb0e8028773e8ca0e16288158ee5cd931c8b1114584", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8a3d41b749f2388264eeeb0e8028773e8ca0e16288158ee5cd931c8b1114584", kill_on_drop: false }`
[INFO] [stdout] a8a3d41b749f2388264eeeb0e8028773e8ca0e16288158ee5cd931c8b1114584
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2563ba0376aeda9c6163f2258532533caa473bcf98e06a397cea98da5403a890
[INFO] running `Command { std: "docker" "start" "-a" "2563ba0376aeda9c6163f2258532533caa473bcf98e06a397cea98da5403a890", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]     Checking futures-channel v0.3.30
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[INFO] [stderr]    Compiling syn v1.0.109
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[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking form_urlencoded v1.2.1
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking concurrent-queue v2.4.0
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]    Compiling async-trait v0.1.77
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]    Compiling either v1.10.0
[INFO] [stderr]    Compiling axum v0.6.20
[INFO] [stderr]    Compiling semver v1.0.21
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling memoffset v0.9.0
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[INFO] [stderr]     Checking event-listener v5.0.0
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[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking idna v0.5.0
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking alloc-stdlib v0.2.2
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking anstyle-parse v0.2.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking event-listener-strategy v0.5.0
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[INFO] [stderr]    Compiling rustc_version v0.4.0
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[INFO] [stderr]    Compiling cc v1.0.83
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[INFO] [stderr]     Checking regex-automata v0.3.9
[INFO] [stderr]    Compiling ring v0.17.7
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[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]    Compiling pyo3-ffi v0.19.2
[INFO] [stderr]    Compiling pyo3 v0.19.2
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[INFO] [stderr]    Compiling rustls v0.21.10
[INFO] [stderr]    Compiling prost-derive v0.11.9
[INFO] [stderr]    Compiling pyo3-asyncio-macros v0.19.0
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]    Compiling pin-project-internal v1.1.4
[INFO] [stderr]    Compiling axum-macros v0.3.8
[INFO] [stderr]    Compiling clap_derive v4.3.12
[INFO] [stderr]     Checking sct v0.7.1
[INFO] [stderr]     Checking rustls-webpki v0.101.7
[INFO] [stderr]     Checking tokio v1.30.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking pin-project v1.1.4
[INFO] [stderr]    Compiling pyo3-macros v0.19.2
[INFO] [stderr]     Checking prost v0.11.9
[INFO] [stderr]     Checking tungstenite v0.20.1
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking blocking v1.5.1
[INFO] [stderr]     Checking prost-types v0.11.9
[INFO] [stderr]     Checking clap v4.3.24
[INFO] [stderr]     Checking serde v1.0.196
[INFO] [stderr]     Checking axum-core v0.3.4
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking tokio-util v0.7.10
[INFO] [stderr]     Checking tokio-tungstenite v0.20.1
[INFO] [stderr]     Checking tokio-io-timeout v1.2.0
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking async-compression v0.4.6
[INFO] [stderr]     Checking tokio-rustls v0.24.1
[INFO] [stderr]     Checking pyo3-asyncio v0.19.0
[INFO] [stderr]     Checking h2 v0.3.24
[INFO] [stderr]     Checking tower v0.4.13
[INFO] [stderr]     Checking tower-http v0.4.4
[INFO] [stderr]     Checking serde_path_to_error v0.1.15
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking toml_edit v0.19.15
[INFO] [stderr]     Checking toml v0.7.8
[INFO] [stderr]     Checking hyper v0.14.28
[INFO] [stderr]     Checking hyper-timeout v0.4.1
[INFO] [stderr]     Checking hyper-rustls v0.24.2
[INFO] [stderr]     Checking tonic v0.9.2
[INFO] [stderr]     Checking hypermangle-py v0.2.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/hypermangle-py-0.2.0/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(exclusive_wrapper)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hypermangle-py` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2563ba0376aeda9c6163f2258532533caa473bcf98e06a397cea98da5403a890", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2563ba0376aeda9c6163f2258532533caa473bcf98e06a397cea98da5403a890", kill_on_drop: false }`
[INFO] [stdout] 2563ba0376aeda9c6163f2258532533caa473bcf98e06a397cea98da5403a890
[INFO] documenting hypermangle-core-0.6.3 against beta-2024-02-10 for beta-1.77-rustdoc-1
[INFO] extracting crate hypermangle-core 0.6.3 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate hypermangle-core 0.6.3 on toolchain beta-2024-02-10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hypermangle-core 0.6.3
[INFO] finished tweaking crates.io crate hypermangle-core 0.6.3
[INFO] tweaked toml for crates.io crate hypermangle-core 0.6.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aef0390525abfc39598fdfeceea0854cc0f1590da39bd379c901011a04e007f8
[INFO] running `Command { std: "docker" "start" "-a" "aef0390525abfc39598fdfeceea0854cc0f1590da39bd379c901011a04e007f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aef0390525abfc39598fdfeceea0854cc0f1590da39bd379c901011a04e007f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aef0390525abfc39598fdfeceea0854cc0f1590da39bd379c901011a04e007f8", kill_on_drop: false }`
[INFO] [stdout] aef0390525abfc39598fdfeceea0854cc0f1590da39bd379c901011a04e007f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c57de3683ed059949ef740871a0481781727ce3c744060a9da937c14c26f168
[INFO] running `Command { std: "docker" "start" "-a" "5c57de3683ed059949ef740871a0481781727ce3c744060a9da937c14c26f168", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling target-lexicon v0.12.13
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking mio v0.8.10
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]     Checking form_urlencoded v1.2.1
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking concurrent-queue v2.4.0
[INFO] [stderr]    Compiling async-trait v0.1.77
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]    Compiling either v1.10.0
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]    Compiling axum v0.6.20
[INFO] [stderr]    Compiling semver v1.0.21
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.4
[INFO] [stderr]     Checking event-listener v4.0.3
[INFO] [stderr]     Checking idna v0.5.0
[INFO] [stderr]     Checking event-listener v5.0.0
[INFO] [stderr]     Checking alloc-stdlib v0.2.2
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking brotli-decompressor v2.5.1
[INFO] [stderr]     Checking event-listener-strategy v0.4.0
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking event-listener-strategy v0.5.0
[INFO] [stderr]     Checking anstyle-parse v0.2.3
[INFO] [stderr]     Checking is-terminal v0.4.12
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking unindent v0.1.11
[INFO] [stderr]     Checking anstyle-query v1.0.2
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking url v2.5.0
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]     Checking anstyle v1.0.6
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]    Compiling pyo3-build-config v0.19.2
[INFO] [stderr]     Checking async-channel v2.2.0
[INFO] [stderr]     Checking anstream v0.3.2
[INFO] [stderr]     Checking async-lock v3.3.0
[INFO] [stderr]    Compiling interprocess v1.2.1
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]     Checking winnow v0.5.40
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]     Checking clap_builder v4.3.24
[INFO] [stderr]     Checking rustls-native-certs v0.6.3
[INFO] [stderr]     Checking spinning v0.1.0
[INFO] [stderr]     Checking brotli v3.4.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.11
[INFO] [stderr]     Checking to_method v1.1.0
[INFO] [stderr]     Checking http-range-header v0.3.1
[INFO] [stderr]     Checking bitflags v2.4.2
[INFO] [stderr]     Checking intmap v0.7.1
[INFO] [stderr]     Checking fern v0.6.2
[INFO] [stderr]     Checking constant_time_eq v0.3.0
[INFO] [stderr]    Compiling ring v0.17.7
[INFO] [stderr]     Checking hdrhistogram v7.5.4
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking regex-automata v0.3.9
[INFO] [stderr]    Compiling pyo3-ffi v0.19.2
[INFO] [stderr]    Compiling pyo3 v0.19.2
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]    Compiling pyo3-macros-backend v0.19.2
[INFO] [stderr]     Checking regex v1.9.6
[INFO] [stderr]    Compiling prost-derive v0.11.9
[INFO] [stderr]    Compiling pyo3-asyncio-macros v0.19.0
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]    Compiling pin-project-internal v1.1.4
[INFO] [stderr]    Compiling axum-macros v0.3.8
[INFO] [stderr]    Compiling clap_derive v4.3.12
[INFO] [stderr]    Compiling rustls v0.21.10
[INFO] [stderr]     Checking tokio v1.30.0
[INFO] [stderr]     Checking sct v0.7.1
[INFO] [stderr]     Checking rustls-webpki v0.101.7
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking tungstenite v0.20.1
[INFO] [stderr]     Checking pin-project v1.1.4
[INFO] [stderr]    Compiling pyo3-macros v0.19.2
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking prost v0.11.9
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking blocking v1.5.1
[INFO] [stderr]     Checking prost-types v0.11.9
[INFO] [stderr]     Checking clap v4.3.24
[INFO] [stderr]     Checking serde v1.0.196
[INFO] [stderr]     Checking axum-core v0.3.4
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking tokio-util v0.7.10
[INFO] [stderr]     Checking tokio-tungstenite v0.20.1
[INFO] [stderr]     Checking tokio-io-timeout v1.2.0
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking async-compression v0.4.6
[INFO] [stderr]     Checking tokio-rustls v0.24.1
[INFO] [stderr]     Checking pyo3-asyncio v0.19.0
[INFO] [stderr]     Checking h2 v0.3.24
[INFO] [stderr]     Checking tower v0.4.13
[INFO] [stderr]     Checking tower-http v0.4.4
[INFO] [stderr]     Checking serde_path_to_error v0.1.15
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking toml_edit v0.19.15
[INFO] [stderr]     Checking toml v0.7.8
[INFO] [stderr]     Checking hyper v0.14.28
[INFO] [stderr]     Checking hyper-timeout v0.4.1
[INFO] [stderr]     Checking hyper-rustls v0.24.2
[INFO] [stderr]     Checking tonic v0.9.2
[INFO] [stderr]     Checking hypermangle-py v0.2.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/hypermangle-py-0.2.0/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(exclusive_wrapper)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hypermangle-py` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5c57de3683ed059949ef740871a0481781727ce3c744060a9da937c14c26f168", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c57de3683ed059949ef740871a0481781727ce3c744060a9da937c14c26f168", kill_on_drop: false }`
[INFO] [stdout] 5c57de3683ed059949ef740871a0481781727ce3c744060a9da937c14c26f168
