[INFO] fetching crate cpclib-tokens 0.7.0...
[INFO] documenting cpclib-tokens-0.7.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate cpclib-tokens 0.7.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate cpclib-tokens 0.7.0 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 crates.io crate cpclib-tokens 0.7.0
[INFO] finished tweaking crates.io crate cpclib-tokens 0.7.0
[INFO] tweaked toml for crates.io crate cpclib-tokens 0.7.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded delegate v0.10.0
[INFO] [stderr]   Downloaded remain v0.2.12
[INFO] [stderr]   Downloaded cpclib-common v0.7.0
[INFO] [stderr]   Downloaded cargo-lock v9.0.0
[INFO] [stderr]   Downloaded built v0.6.1
[INFO] [stderr]   Downloaded cpclib-sna v0.7.0
[INFO] [stderr]   Downloaded evalexpr v11.3.0
[INFO] [stderr]   Downloaded ordered-float v3.9.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] aac92e398e3f6454b39c89696efd538a1b827d61b8bde1c312880b58be146f4e
[INFO] running `Command { std: "docker" "start" "-a" "aac92e398e3f6454b39c89696efd538a1b827d61b8bde1c312880b58be146f4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aac92e398e3f6454b39c89696efd538a1b827d61b8bde1c312880b58be146f4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aac92e398e3f6454b39c89696efd538a1b827d61b8bde1c312880b58be146f4e", kill_on_drop: false }`
[INFO] [stdout] aac92e398e3f6454b39c89696efd538a1b827d61b8bde1c312880b58be146f4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 767790d08ec9f6cac3ec10918f8faf7dc8dc9da1846ff84a299af41cf91040a3
[INFO] running `Command { std: "docker" "start" "-a" "767790d08ec9f6cac3ec10918f8faf7dc8dc9da1846ff84a299af41cf91040a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling semver v1.0.21
[INFO] [stderr]    Compiling unicode-bidi v0.3.14
[INFO] [stderr]    Compiling iana-time-zone v0.1.59
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling form_urlencoded v1.2.1
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking bytecount v0.6.7
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]     Checking resolve-path v0.1.0
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking rayon v1.8.0
[INFO] [stderr]     Checking itertools v0.11.0
[INFO] [stderr]     Checking smol_str v0.2.0
[INFO] [stderr]     Checking bitfield v0.14.0
[INFO] [stderr]     Checking bitsets v0.1.1
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]     Checking evalexpr v11.3.0
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling chrono v0.4.31
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking num-complex v0.4.4
[INFO] [stderr]     Checking ordered-float v3.9.2
[INFO] [stderr]    Compiling idna v0.5.0
[INFO] [stderr]     Checking num-iter v0.1.43
[INFO] [stderr]    Compiling url v2.5.0
[INFO] [stderr]     Checking nom_locate v4.2.0
[INFO] [stderr]     Checking num-rational v0.4.1
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking cpclib-common v0.7.0
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]    Compiling delegate v0.10.0
[INFO] [stderr]    Compiling serde_derive v1.0.195
[INFO] [stderr]    Compiling remain v0.2.12
[INFO] [stderr]    Compiling serde_spanned v0.6.5
[INFO] [stderr]    Compiling toml_datetime v0.6.5
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling toml v0.7.8
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling cargo-lock v9.0.0
[INFO] [stderr]    Compiling num_enum_derive v0.6.1
[INFO] [stderr]    Compiling built v0.6.1
[INFO] [stderr]    Compiling cpclib-sna v0.7.0
[INFO] [stderr]    Compiling cpclib-tokens v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking num_enum v0.6.1
[INFO] [stderr]  Documenting cpclib-tokens v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(exclusive_range_pattern)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 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 `cpclib-tokens`
[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 cpclib_tokens src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=67eaa8d152269314 -L dependency=/opt/rustwide/target/debug/deps --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-1b06147f67f93fdc.rmeta --extern cpclib_common=/opt/rustwide/target/debug/deps/libcpclib_common-3ddf5d5d3d4f098a.rmeta --extern cpclib_sna=/opt/rustwide/target/debug/deps/libcpclib_sna-f3e72540f808124e.rmeta --extern delegate=/opt/rustwide/target/debug/deps/libdelegate-e215ce10fbe649e9.so --extern either=/opt/rustwide/target/debug/deps/libeither-19ab30b8af571b4d.rmeta --extern evalexpr=/opt/rustwide/target/debug/deps/libevalexpr-9b1523ed7120b5af.rmeta --extern matches=/opt/rustwide/target/debug/deps/libmatches-a67b2d414eeb97f4.rmeta --extern ordered_float=/opt/rustwide/target/debug/deps/libordered_float-695f2e9af652f9ff.rmeta --extern paste=/opt/rustwide/target/debug/deps/libpaste-5d8b8ccb77a64e55.so --extern regex=/opt/rustwide/target/debug/deps/libregex-bb97d4c84dce92ed.rmeta --extern remain=/opt/rustwide/target/debug/deps/libremain-55e814649bd5d3f4.so --extern serde=/opt/rustwide/target/debug/deps/libserde-f12fcc055fb2bfeb.rmeta --cap-lints=warn --crate-version 0.7.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "767790d08ec9f6cac3ec10918f8faf7dc8dc9da1846ff84a299af41cf91040a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "767790d08ec9f6cac3ec10918f8faf7dc8dc9da1846ff84a299af41cf91040a3", kill_on_drop: false }`
[INFO] [stdout] 767790d08ec9f6cac3ec10918f8faf7dc8dc9da1846ff84a299af41cf91040a3
[INFO] documenting cpclib-tokens-0.7.0 against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] extracting crate cpclib-tokens 0.7.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate cpclib-tokens 0.7.0 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 crates.io crate cpclib-tokens 0.7.0
[INFO] finished tweaking crates.io crate cpclib-tokens 0.7.0
[INFO] tweaked toml for crates.io crate cpclib-tokens 0.7.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "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-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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] e0748347ccb4aa9d594232385a57792d574ff0e017a4908b54cf5fc2c5afa9d9
[INFO] running `Command { std: "docker" "start" "-a" "e0748347ccb4aa9d594232385a57792d574ff0e017a4908b54cf5fc2c5afa9d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0748347ccb4aa9d594232385a57792d574ff0e017a4908b54cf5fc2c5afa9d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0748347ccb4aa9d594232385a57792d574ff0e017a4908b54cf5fc2c5afa9d9", kill_on_drop: false }`
[INFO] [stdout] e0748347ccb4aa9d594232385a57792d574ff0e017a4908b54cf5fc2c5afa9d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 94976101ddf70b66ca3552985d28c23d78dcaa7fe539e4dceb808b415a080b8f
[INFO] running `Command { std: "docker" "start" "-a" "94976101ddf70b66ca3552985d28c23d78dcaa7fe539e4dceb808b415a080b8f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling unicode-bidi v0.3.14
[INFO] [stderr]    Compiling semver v1.0.21
[INFO] [stderr]    Compiling iana-time-zone v0.1.59
[INFO] [stderr]    Compiling form_urlencoded v1.2.1
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]     Checking bytecount v0.6.7
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]     Checking resolve-path v0.1.0
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking rayon v1.8.0
[INFO] [stderr]     Checking itertools v0.11.0
[INFO] [stderr]     Checking smol_str v0.2.0
[INFO] [stderr]     Checking bitfield v0.14.0
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]     Checking bitsets v0.1.1
[INFO] [stderr]     Checking evalexpr v11.3.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling chrono v0.4.31
[INFO] [stderr]    Compiling idna v0.5.0
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking num-complex v0.4.4
[INFO] [stderr]     Checking ordered-float v3.9.2
[INFO] [stderr]     Checking num-iter v0.1.43
[INFO] [stderr]    Compiling url v2.5.0
[INFO] [stderr]     Checking nom_locate v4.2.0
[INFO] [stderr]     Checking num-rational v0.4.1
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking cpclib-common v0.7.0
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]    Compiling serde_derive v1.0.195
[INFO] [stderr]    Compiling remain v0.2.12
[INFO] [stderr]    Compiling delegate v0.10.0
[INFO] [stderr]    Compiling serde_spanned v0.6.5
[INFO] [stderr]    Compiling toml_datetime v0.6.5
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling toml v0.7.8
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling cargo-lock v9.0.0
[INFO] [stderr]    Compiling num_enum_derive v0.6.1
[INFO] [stderr]    Compiling built v0.6.1
[INFO] [stderr]    Compiling cpclib-sna v0.7.0
[INFO] [stderr]    Compiling cpclib-tokens v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking num_enum v0.6.1
[INFO] [stderr]  Documenting cpclib-tokens v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(exclusive_range_pattern)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 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 `cpclib-tokens`
[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 cpclib_tokens src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=95e20f3e6b969872 -L dependency=/opt/rustwide/target/debug/deps --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-102ae0f1eb56902b.rmeta --extern cpclib_common=/opt/rustwide/target/debug/deps/libcpclib_common-6b790d730de25acb.rmeta --extern cpclib_sna=/opt/rustwide/target/debug/deps/libcpclib_sna-bfedd0854c221a57.rmeta --extern delegate=/opt/rustwide/target/debug/deps/libdelegate-c9f338f62b5abce3.so --extern either=/opt/rustwide/target/debug/deps/libeither-23a3e5cb7fe3b37b.rmeta --extern evalexpr=/opt/rustwide/target/debug/deps/libevalexpr-128908d9c3b3ba98.rmeta --extern matches=/opt/rustwide/target/debug/deps/libmatches-306f064f1b8c83bd.rmeta --extern ordered_float=/opt/rustwide/target/debug/deps/libordered_float-90e5590924805219.rmeta --extern paste=/opt/rustwide/target/debug/deps/libpaste-abc4f255c9df8716.so --extern regex=/opt/rustwide/target/debug/deps/libregex-a7769f95563e5daa.rmeta --extern remain=/opt/rustwide/target/debug/deps/libremain-09017e6657ee05cf.so --extern serde=/opt/rustwide/target/debug/deps/libserde-c55f8848c04dc88a.rmeta --cap-lints=warn --crate-version 0.7.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "94976101ddf70b66ca3552985d28c23d78dcaa7fe539e4dceb808b415a080b8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94976101ddf70b66ca3552985d28c23d78dcaa7fe539e4dceb808b415a080b8f", kill_on_drop: false }`
[INFO] [stdout] 94976101ddf70b66ca3552985d28c23d78dcaa7fe539e4dceb808b415a080b8f
