[INFO] fetching crate confium 0.1.2...
[INFO] documenting confium-0.1.2 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate confium 0.1.2 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate confium 0.1.2 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 confium 0.1.2
[INFO] finished tweaking crates.io crate confium 0.1.2
[INFO] tweaked toml for crates.io crate confium 0.1.2 written to /workspace/builds/worker-2-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 slog-async v2.8.0
[INFO] [stderr]   Downloaded slog-stdlog v4.1.1
[INFO] [stderr]   Downloaded slog-term v2.9.0
[INFO] [stderr]   Downloaded snafu v0.6.10
[INFO] [stderr]   Downloaded slog-scope v4.4.0
[INFO] [stderr]   Downloaded snafu-derive v0.6.10
[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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df841173971b0a48c7d83bc27d923f256fe71b95ab03262ecad8094b920debad
[INFO] running `Command { std: "docker" "start" "-a" "df841173971b0a48c7d83bc27d923f256fe71b95ab03262ecad8094b920debad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df841173971b0a48c7d83bc27d923f256fe71b95ab03262ecad8094b920debad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df841173971b0a48c7d83bc27d923f256fe71b95ab03262ecad8094b920debad", kill_on_drop: false }`
[INFO] [stdout] df841173971b0a48c7d83bc27d923f256fe71b95ab03262ecad8094b920debad
[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" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 115d8afd5ccba2bff8f1408da96674415c4c4c850d65e8ddad4d8b58c5b4c065
[INFO] running `Command { std: "docker" "start" "-a" "115d8afd5ccba2bff8f1408da96674415c4c4c850d65e8ddad4d8b58c5b4c065", kill_on_drop: false }`
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking arc-swap v1.6.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]    Compiling slog-async v2.8.0
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking libloading v0.7.4
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]    Compiling time-macros v0.2.17
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking slog-scope v4.4.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking slog-stdlog v4.1.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.11
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking slog-term v2.9.0
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]     Checking snafu v0.6.10
[INFO] [stderr]  Documenting confium v0.1.2 (/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(backtrace)]
[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(let_else)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `let_else` has been stable since `1.65.0` and no longer requires an attribute to enable
[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 `confium`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type cdylib --crate-name confium src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e830773f590c66bd -L dependency=/opt/rustwide/target/debug/deps --extern libloading=/opt/rustwide/target/debug/deps/liblibloading-ffa7f3e30b9ec5a1.rmeta --extern slog=/opt/rustwide/target/debug/deps/libslog-c8f18fc72194bbdf.rmeta --extern slog_async=/opt/rustwide/target/debug/deps/libslog_async-d844f622de04522b.rmeta --extern slog_stdlog=/opt/rustwide/target/debug/deps/libslog_stdlog-190e79c96457cb95.rmeta --extern slog_term=/opt/rustwide/target/debug/deps/libslog_term-6775cc2cf6a96cb4.rmeta --extern snafu=/opt/rustwide/target/debug/deps/libsnafu-7e2720f81077c233.rmeta --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "115d8afd5ccba2bff8f1408da96674415c4c4c850d65e8ddad4d8b58c5b4c065", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "115d8afd5ccba2bff8f1408da96674415c4c4c850d65e8ddad4d8b58c5b4c065", kill_on_drop: false }`
[INFO] [stdout] 115d8afd5ccba2bff8f1408da96674415c4c4c850d65e8ddad4d8b58c5b4c065
[INFO] documenting confium-0.1.2 against beta-2024-02-10 for beta-1.77-rustdoc-1
[INFO] extracting crate confium 0.1.2 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate confium 0.1.2 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 confium 0.1.2
[INFO] finished tweaking crates.io crate confium 0.1.2
[INFO] tweaked toml for crates.io crate confium 0.1.2 written to /workspace/builds/worker-2-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-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-2024-02-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5ffc83e66a223a2cbe6c1da650318873fd7a34350ff80d3c252e1ca5925ed0c
[INFO] running `Command { std: "docker" "start" "-a" "c5ffc83e66a223a2cbe6c1da650318873fd7a34350ff80d3c252e1ca5925ed0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5ffc83e66a223a2cbe6c1da650318873fd7a34350ff80d3c252e1ca5925ed0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5ffc83e66a223a2cbe6c1da650318873fd7a34350ff80d3c252e1ca5925ed0c", kill_on_drop: false }`
[INFO] [stdout] c5ffc83e66a223a2cbe6c1da650318873fd7a34350ff80d3c252e1ca5925ed0c
[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-2024-02-10" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ab857131ffb8ce4f9179686a1aad39b7a4da3a442d360dc059b46f2d68dad9a
[INFO] running `Command { std: "docker" "start" "-a" "2ab857131ffb8ce4f9179686a1aad39b7a4da3a442d360dc059b46f2d68dad9a", kill_on_drop: false }`
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]     Checking arc-swap v1.6.0
[INFO] [stderr]    Compiling slog-async v2.8.0
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking libloading v0.7.4
[INFO] [stderr]    Compiling time-macros v0.2.17
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking slog-scope v4.4.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking slog-stdlog v4.1.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.11
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking slog-term v2.9.0
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]     Checking snafu v0.6.10
[INFO] [stderr]  Documenting confium v0.1.2 (/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(backtrace)]
[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(let_else)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `let_else` has been stable since `1.65.0` and no longer requires an attribute to enable
[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 `confium`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2024-02-10-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type cdylib --crate-name confium src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=cea467b81208ed0d -L dependency=/opt/rustwide/target/debug/deps --extern libloading=/opt/rustwide/target/debug/deps/liblibloading-4286b7b0a99bcc6c.rmeta --extern slog=/opt/rustwide/target/debug/deps/libslog-d4b3080b3ac2965b.rmeta --extern slog_async=/opt/rustwide/target/debug/deps/libslog_async-fc753ccbf13d2f2c.rmeta --extern slog_stdlog=/opt/rustwide/target/debug/deps/libslog_stdlog-af9566606764e549.rmeta --extern slog_term=/opt/rustwide/target/debug/deps/libslog_term-7953e59813b58208.rmeta --extern snafu=/opt/rustwide/target/debug/deps/libsnafu-cd2e8465154fd4da.rmeta --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2ab857131ffb8ce4f9179686a1aad39b7a4da3a442d360dc059b46f2d68dad9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ab857131ffb8ce4f9179686a1aad39b7a4da3a442d360dc059b46f2d68dad9a", kill_on_drop: false }`
[INFO] [stdout] 2ab857131ffb8ce4f9179686a1aad39b7a4da3a442d360dc059b46f2d68dad9a
