[INFO] fetching crate lemon-tree-derive 1.0.4...
[INFO] documenting lemon-tree-derive-1.0.4 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate lemon-tree-derive 1.0.4 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate lemon-tree-derive 1.0.4 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 lemon-tree-derive 1.0.4
[INFO] finished tweaking crates.io crate lemon-tree-derive 1.0.4
[INFO] tweaked toml for crates.io crate lemon-tree-derive 1.0.4 written to /workspace/builds/worker-6-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 lemon-mint v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] c3cbd78f1be02637506c38067d95105f645f9cbdd26b7fb0dcfd34109654945e
[INFO] running `Command { std: "docker" "start" "-a" "c3cbd78f1be02637506c38067d95105f645f9cbdd26b7fb0dcfd34109654945e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3cbd78f1be02637506c38067d95105f645f9cbdd26b7fb0dcfd34109654945e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3cbd78f1be02637506c38067d95105f645f9cbdd26b7fb0dcfd34109654945e", kill_on_drop: false }`
[INFO] [stdout] c3cbd78f1be02637506c38067d95105f645f9cbdd26b7fb0dcfd34109654945e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 5ed1038ad7e09b93e0e71948309268c52984878fbb4e52bcfcd968fc3b030bed
[INFO] running `Command { std: "docker" "start" "-a" "5ed1038ad7e09b93e0e71948309268c52984878fbb4e52bcfcd968fc3b030bed", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]     Checking lemon-mint v0.1.4
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]  Documenting lemon-tree-derive v1.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(proc_macro_span)]
[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 document `lemon-tree-derive`
[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 proc-macro --crate-name lemon_tree_derive src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f11ebea5ce3accc0 -L dependency=/opt/rustwide/target/debug/deps --extern lemon_mint=/opt/rustwide/target/debug/deps/liblemon_mint-0bb72de156368db6.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-b866919e2ba756de.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-1bc556be54688c37.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-44762e16f83d10ff.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-931b7ad2a3e506f1.rmeta --extern proc_macro --cap-lints=warn --crate-version 1.0.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5ed1038ad7e09b93e0e71948309268c52984878fbb4e52bcfcd968fc3b030bed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ed1038ad7e09b93e0e71948309268c52984878fbb4e52bcfcd968fc3b030bed", kill_on_drop: false }`
[INFO] [stdout] 5ed1038ad7e09b93e0e71948309268c52984878fbb4e52bcfcd968fc3b030bed
[INFO] documenting lemon-tree-derive-1.0.4 against beta-2024-02-10 for beta-1.77-rustdoc-1
[INFO] extracting crate lemon-tree-derive 1.0.4 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate lemon-tree-derive 1.0.4 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 lemon-tree-derive 1.0.4
[INFO] finished tweaking crates.io crate lemon-tree-derive 1.0.4
[INFO] tweaked toml for crates.io crate lemon-tree-derive 1.0.4 written to /workspace/builds/worker-6-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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 11b317543488126ab671678e337d54d149940abd36ae639256ff820098298213
[INFO] running `Command { std: "docker" "start" "-a" "11b317543488126ab671678e337d54d149940abd36ae639256ff820098298213", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11b317543488126ab671678e337d54d149940abd36ae639256ff820098298213", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11b317543488126ab671678e337d54d149940abd36ae639256ff820098298213", kill_on_drop: false }`
[INFO] [stdout] 11b317543488126ab671678e337d54d149940abd36ae639256ff820098298213
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] fba70b8a7947702c84c65ece9fb3223a06dae3a26ef7f393c291335e7f446ba4
[INFO] running `Command { std: "docker" "start" "-a" "fba70b8a7947702c84c65ece9fb3223a06dae3a26ef7f393c291335e7f446ba4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]     Checking lemon-mint v0.1.4
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]  Documenting lemon-tree-derive v1.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(proc_macro_span)]
[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 document `lemon-tree-derive`
[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 proc-macro --crate-name lemon_tree_derive src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7daad2048d4d4cc0 -L dependency=/opt/rustwide/target/debug/deps --extern lemon_mint=/opt/rustwide/target/debug/deps/liblemon_mint-d03452ff8b0c8b12.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-169c79dbe5704c03.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-754bef7b7fa42b0e.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-8d9e10a0b15b51fc.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-bd7a4bb60f8384aa.rmeta --extern proc_macro --cap-lints=warn --crate-version 1.0.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "fba70b8a7947702c84c65ece9fb3223a06dae3a26ef7f393c291335e7f446ba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fba70b8a7947702c84c65ece9fb3223a06dae3a26ef7f393c291335e7f446ba4", kill_on_drop: false }`
[INFO] [stdout] fba70b8a7947702c84c65ece9fb3223a06dae3a26ef7f393c291335e7f446ba4
