[INFO] fetching crate confium 0.1.2...
[INFO] documenting confium-0.1.2 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate confium 0.1.2 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate confium 0.1.2 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 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-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]     Blocking waiting for file lock on package cache
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded slog-async v2.8.0
[INFO] [stderr]   Downloaded snafu-derive v0.6.10
[INFO] [stderr]   Downloaded slog-scope v4.4.0
[INFO] [stderr]   Downloaded slog-stdlog v4.1.1
[INFO] [stderr]   Downloaded snafu v0.6.10
[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] c7097bda6f60a3964156b578b008d8bf98bf7be38cf3c3bdf4a9f8d539851272
[INFO] running `Command { std: "docker" "start" "-a" "c7097bda6f60a3964156b578b008d8bf98bf7be38cf3c3bdf4a9f8d539851272", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c7097bda6f60a3964156b578b008d8bf98bf7be38cf3c3bdf4a9f8d539851272", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7097bda6f60a3964156b578b008d8bf98bf7be38cf3c3bdf4a9f8d539851272", kill_on_drop: false }`
[INFO] [stdout] c7097bda6f60a3964156b578b008d8bf98bf7be38cf3c3bdf4a9f8d539851272
[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] 8635aa660f90b3232bb9ba0f8c0ba8b3015470f93526f5b3c4eb6af21aa696d6
[INFO] running `Command { std: "docker" "start" "-a" "8635aa660f90b3232bb9ba0f8c0ba8b3015470f93526f5b3c4eb6af21aa696d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling time-macros v0.2.16
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]    Compiling slog-async v2.8.0
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking libloading v0.7.4
[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 v0.5.10
[INFO] [stderr]     Checking time v0.3.31
[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/1.75.0-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=10e839848114f00d -L dependency=/opt/rustwide/target/debug/deps --extern libloading=/opt/rustwide/target/debug/deps/liblibloading-29c88375499a3949.rmeta --extern slog=/opt/rustwide/target/debug/deps/libslog-300a76947a1680a9.rmeta --extern slog_async=/opt/rustwide/target/debug/deps/libslog_async-63a8f8140e04d769.rmeta --extern slog_stdlog=/opt/rustwide/target/debug/deps/libslog_stdlog-5869acd768a1e0b1.rmeta --extern slog_term=/opt/rustwide/target/debug/deps/libslog_term-efa6bdede29e6711.rmeta --extern snafu=/opt/rustwide/target/debug/deps/libsnafu-0a28eb9424a754b8.rmeta --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8635aa660f90b3232bb9ba0f8c0ba8b3015470f93526f5b3c4eb6af21aa696d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8635aa660f90b3232bb9ba0f8c0ba8b3015470f93526f5b3c4eb6af21aa696d6", kill_on_drop: false }`
[INFO] [stdout] 8635aa660f90b3232bb9ba0f8c0ba8b3015470f93526f5b3c4eb6af21aa696d6
[INFO] documenting confium-0.1.2 against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] extracting crate confium 0.1.2 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate confium 0.1.2 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 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-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]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[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] 2d5fc1d3f98f59b805cc73e05e0bf7ed37e2fb02981e9f7ceb3215d913685970
[INFO] running `Command { std: "docker" "start" "-a" "2d5fc1d3f98f59b805cc73e05e0bf7ed37e2fb02981e9f7ceb3215d913685970", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2d5fc1d3f98f59b805cc73e05e0bf7ed37e2fb02981e9f7ceb3215d913685970", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d5fc1d3f98f59b805cc73e05e0bf7ed37e2fb02981e9f7ceb3215d913685970", kill_on_drop: false }`
[INFO] [stdout] 2d5fc1d3f98f59b805cc73e05e0bf7ed37e2fb02981e9f7ceb3215d913685970
[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] 995cda0a80dd9c2f512cc9d2c9dc8b603085c14b4af1b282ead38f92dda99111
[INFO] running `Command { std: "docker" "start" "-a" "995cda0a80dd9c2f512cc9d2c9dc8b603085c14b4af1b282ead38f92dda99111", kill_on_drop: false }`
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling time-macros v0.2.16
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]    Compiling slog-async v2.8.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking slog-scope v4.4.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.10
[INFO] [stderr]     Checking slog-stdlog v4.1.1
[INFO] [stderr]     Checking libloading v0.7.4
[INFO] [stderr]     Checking time v0.3.31
[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-2023-12-22-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=650b12b3932e79cc -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-350bb8cfe2519e34.rmeta --extern slog_stdlog=/opt/rustwide/target/debug/deps/libslog_stdlog-af9566606764e549.rmeta --extern slog_term=/opt/rustwide/target/debug/deps/libslog_term-12fb13bbd5c131d0.rmeta --extern snafu=/opt/rustwide/target/debug/deps/libsnafu-e355ed29248c3374.rmeta --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "995cda0a80dd9c2f512cc9d2c9dc8b603085c14b4af1b282ead38f92dda99111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "995cda0a80dd9c2f512cc9d2c9dc8b603085c14b4af1b282ead38f92dda99111", kill_on_drop: false }`
[INFO] [stdout] 995cda0a80dd9c2f512cc9d2c9dc8b603085c14b4af1b282ead38f92dda99111
