[INFO] fetching crate sync_2 1.0.4...
[INFO] documenting sync_2-1.0.4 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate sync_2 1.0.4 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate sync_2 1.0.4 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 sync_2 1.0.4
[INFO] finished tweaking crates.io crate sync_2 1.0.4
[INFO] tweaked toml for crates.io crate sync_2 1.0.4 written to /workspace/builds/worker-0-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 85b0b8ca881a3bc46b7564b03567022dd59bfd4f394bc1af2d6066a6696e7f39
[INFO] running `Command { std: "docker" "start" "-a" "85b0b8ca881a3bc46b7564b03567022dd59bfd4f394bc1af2d6066a6696e7f39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85b0b8ca881a3bc46b7564b03567022dd59bfd4f394bc1af2d6066a6696e7f39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85b0b8ca881a3bc46b7564b03567022dd59bfd4f394bc1af2d6066a6696e7f39", kill_on_drop: false }`
[INFO] [stdout] 85b0b8ca881a3bc46b7564b03567022dd59bfd4f394bc1af2d6066a6696e7f39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] be9ca91ba8f12b7c0f2c5bca56916061e4f55a81f7e3a21fd93bf2b66511d5f2
[INFO] running `Command { std: "docker" "start" "-a" "be9ca91ba8f12b7c0f2c5bca56916061e4f55a81f7e3a21fd93bf2b66511d5f2", kill_on_drop: false }`
[INFO] [stderr]  Documenting sync_2 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(negative_impls)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 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 `sync_2`
[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 lib --crate-name sync_2 src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8241a41575e8cff1 -L dependency=/opt/rustwide/target/debug/deps --extern thread_local=/opt/rustwide/target/debug/deps/libthread_local-dfa4d894cbad8080.rmeta --cap-lints=warn --crate-version 1.0.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "be9ca91ba8f12b7c0f2c5bca56916061e4f55a81f7e3a21fd93bf2b66511d5f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be9ca91ba8f12b7c0f2c5bca56916061e4f55a81f7e3a21fd93bf2b66511d5f2", kill_on_drop: false }`
[INFO] [stdout] be9ca91ba8f12b7c0f2c5bca56916061e4f55a81f7e3a21fd93bf2b66511d5f2
[INFO] documenting sync_2-1.0.4 against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] extracting crate sync_2 1.0.4 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate sync_2 1.0.4 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 sync_2 1.0.4
[INFO] finished tweaking crates.io crate sync_2 1.0.4
[INFO] tweaked toml for crates.io crate sync_2 1.0.4 written to /workspace/builds/worker-0-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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 6af888b9277b6d16f0c0e2bcd3b38219a4c3b9f420ea08e424fc1da4abd9f887
[INFO] running `Command { std: "docker" "start" "-a" "6af888b9277b6d16f0c0e2bcd3b38219a4c3b9f420ea08e424fc1da4abd9f887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6af888b9277b6d16f0c0e2bcd3b38219a4c3b9f420ea08e424fc1da4abd9f887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6af888b9277b6d16f0c0e2bcd3b38219a4c3b9f420ea08e424fc1da4abd9f887", kill_on_drop: false }`
[INFO] [stdout] 6af888b9277b6d16f0c0e2bcd3b38219a4c3b9f420ea08e424fc1da4abd9f887
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ec30a59a42084bb37cb8b5dab5ead7855e409db03b020bb36a650e18bb7ae4fe
[INFO] running `Command { std: "docker" "start" "-a" "ec30a59a42084bb37cb8b5dab5ead7855e409db03b020bb36a650e18bb7ae4fe", kill_on_drop: false }`
[INFO] [stderr]  Documenting sync_2 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(negative_impls)]
[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 `sync_2`
[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 lib --crate-name sync_2 src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=352383d567c76bc4 -L dependency=/opt/rustwide/target/debug/deps --extern thread_local=/opt/rustwide/target/debug/deps/libthread_local-80db8f09daec4150.rmeta --cap-lints=warn --crate-version 1.0.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ec30a59a42084bb37cb8b5dab5ead7855e409db03b020bb36a650e18bb7ae4fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec30a59a42084bb37cb8b5dab5ead7855e409db03b020bb36a650e18bb7ae4fe", kill_on_drop: false }`
[INFO] [stdout] ec30a59a42084bb37cb8b5dab5ead7855e409db03b020bb36a650e18bb7ae4fe
