[INFO] cloning repository https://github.com/Heavenston/redistrib
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Heavenston/redistrib" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHeavenston%2Fredistrib", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHeavenston%2Fredistrib'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 58762d075d940fa7883d940763f65dedb934ba76
[INFO] documenting Heavenston/redistrib against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHeavenston%2Fredistrib" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Heavenston/redistrib on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Heavenston/redistrib
[INFO] finished tweaking git repo https://github.com/Heavenston/redistrib
[INFO] tweaked toml for git repo https://github.com/Heavenston/redistrib written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Heavenston/redistrib already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ouroboros_macro v0.18.1
[INFO] [stderr]   Downloaded ouroboros v0.18.1
[INFO] [stderr]   Downloaded ran v1.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b371ca78fb787182547865608b2b41d713c76084051ccdfbbb73ba438e79c67d
[INFO] running `Command { std: "docker" "start" "-a" "b371ca78fb787182547865608b2b41d713c76084051ccdfbbb73ba438e79c67d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b371ca78fb787182547865608b2b41d713c76084051ccdfbbb73ba438e79c67d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b371ca78fb787182547865608b2b41d713c76084051ccdfbbb73ba438e79c67d", kill_on_drop: false }`
[INFO] [stdout] b371ca78fb787182547865608b2b41d713c76084051ccdfbbb73ba438e79c67d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38c72ff12eb5131a9a4865aad5a53bc4b4b0c5b1d274c8a3c8b3e5d61a665d24
[INFO] running `Command { std: "docker" "start" "-a" "38c72ff12eb5131a9a4865aad5a53bc4b4b0c5b1d274c8a3c8b3e5d61a665d24", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.70
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.29
[INFO] [stderr]     Checking futures-sink v0.3.29
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]    Compiling futures-task v0.3.29
[INFO] [stderr]    Compiling futures-channel v0.3.29
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]    Compiling futures-util v0.3.29
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-io v0.3.29
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling async-trait v0.1.74
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling thiserror v1.0.50
[INFO] [stderr]    Compiling itertools v0.11.0
[INFO] [stderr]     Checking itertools v0.12.0
[INFO] [stderr]     Checking aliasable v0.1.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking ran v1.1.5
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.41
[INFO] [stderr]     Checking mio v0.8.10
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking flume v0.11.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling futures-macro v0.3.29
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling ouroboros_macro v0.18.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.50
[INFO] [stderr]     Checking tokio v1.35.0
[INFO] [stderr]     Checking ouroboros v0.18.1
[INFO] [stderr]     Checking futures-executor v0.3.29
[INFO] [stderr]     Checking futures v0.3.29
[INFO] [stderr]     Checking tokio-util v0.7.10
[INFO] [stderr]     Checking cobweb v0.1.0 (/opt/rustwide/workdir/cobweb)
[INFO] [stderr]  Documenting cobweb v0.1.0 (/opt/rustwide/workdir/cobweb)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> cobweb/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_const_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> cobweb/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(never_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> cobweb/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_const_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> cobweb/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(never_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `cobweb`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name cobweb cobweb/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c659114b0169aa45 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-3947e023969b3aed.rmeta --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-3633a9d20cd870ce.so --extern futures=/opt/rustwide/target/debug/deps/libfutures-6a3513db296c670f.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-3612f8f6bd8ec1e4.rmeta --extern static_assertions=/opt/rustwide/target/debug/deps/libstatic_assertions-db8ec3c51ee52c29.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-378e02a681ad5e7f.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cobweb` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "38c72ff12eb5131a9a4865aad5a53bc4b4b0c5b1d274c8a3c8b3e5d61a665d24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38c72ff12eb5131a9a4865aad5a53bc4b4b0c5b1d274c8a3c8b3e5d61a665d24", kill_on_drop: false }`
[INFO] [stdout] 38c72ff12eb5131a9a4865aad5a53bc4b4b0c5b1d274c8a3c8b3e5d61a665d24
[INFO] documenting Heavenston/redistrib against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHeavenston%2Fredistrib" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Heavenston/redistrib on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Heavenston/redistrib
[INFO] finished tweaking git repo https://github.com/Heavenston/redistrib
[INFO] tweaked toml for git repo https://github.com/Heavenston/redistrib written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Heavenston/redistrib already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01bf3ddd2ac433a8414a0dd1ac9d06b2185bfcafc3fc2886f6b4f60e96351b5f
[INFO] running `Command { std: "docker" "start" "-a" "01bf3ddd2ac433a8414a0dd1ac9d06b2185bfcafc3fc2886f6b4f60e96351b5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01bf3ddd2ac433a8414a0dd1ac9d06b2185bfcafc3fc2886f6b4f60e96351b5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01bf3ddd2ac433a8414a0dd1ac9d06b2185bfcafc3fc2886f6b4f60e96351b5f", kill_on_drop: false }`
[INFO] [stdout] 01bf3ddd2ac433a8414a0dd1ac9d06b2185bfcafc3fc2886f6b4f60e96351b5f
[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=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-2023-12-22" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4a88e48cf247031551b4d97a09ee9df5c2a9c67a8423b5aa347a0eb061a54ba
[INFO] running `Command { std: "docker" "start" "-a" "b4a88e48cf247031551b4d97a09ee9df5c2a9c67a8423b5aa347a0eb061a54ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.70
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.29
[INFO] [stderr]     Checking futures-sink v0.3.29
[INFO] [stderr]    Compiling futures-task v0.3.29
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling futures-channel v0.3.29
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]    Compiling futures-util v0.3.29
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking futures-io v0.3.29
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]    Compiling async-trait v0.1.74
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling thiserror v1.0.50
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling itertools v0.11.0
[INFO] [stderr]     Checking itertools v0.12.0
[INFO] [stderr]     Checking aliasable v0.1.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]     Checking ran v1.1.5
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling syn v2.0.41
[INFO] [stderr]     Checking mio v0.8.10
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking flume v0.11.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling futures-macro v0.3.29
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling ouroboros_macro v0.18.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.50
[INFO] [stderr]     Checking tokio v1.35.0
[INFO] [stderr]     Checking ouroboros v0.18.1
[INFO] [stderr]     Checking futures-executor v0.3.29
[INFO] [stderr]     Checking futures v0.3.29
[INFO] [stderr]     Checking tokio-util v0.7.10
[INFO] [stderr]     Checking cobweb v0.1.0 (/opt/rustwide/workdir/cobweb)
[INFO] [stderr]  Documenting cobweb v0.1.0 (/opt/rustwide/workdir/cobweb)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> cobweb/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_const_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> cobweb/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_const_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> cobweb/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(never_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> cobweb/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(never_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `cobweb`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2023-12-22-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name cobweb cobweb/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8a6d474ae6cc77a7 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-b9ece1ba9722ce8d.rmeta --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-2b7caf3617705acb.so --extern futures=/opt/rustwide/target/debug/deps/libfutures-1f82fefd5b043e5f.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-ae0b7d9bfdce9a51.rmeta --extern static_assertions=/opt/rustwide/target/debug/deps/libstatic_assertions-8d94f719bba1eb3a.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-85d8e105b82deb78.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cobweb` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "b4a88e48cf247031551b4d97a09ee9df5c2a9c67a8423b5aa347a0eb061a54ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4a88e48cf247031551b4d97a09ee9df5c2a9c67a8423b5aa347a0eb061a54ba", kill_on_drop: false }`
[INFO] [stdout] b4a88e48cf247031551b4d97a09ee9df5c2a9c67a8423b5aa347a0eb061a54ba
