[INFO] fetching crate piecrust-uplink 0.8.0...
[INFO] documenting piecrust-uplink-0.8.0 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate piecrust-uplink 0.8.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate piecrust-uplink 0.8.0 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 piecrust-uplink 0.8.0
[INFO] finished tweaking crates.io crate piecrust-uplink 0.8.0
[INFO] tweaked toml for crates.io crate piecrust-uplink 0.8.0 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" "+1.76.0" "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 dlmalloc v0.2.5
[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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6242c19208e6e249eb071023ea248eacda3a9f43eba3a0d9f7e209ad4b2667c6
[INFO] running `Command { std: "docker" "start" "-a" "6242c19208e6e249eb071023ea248eacda3a9f43eba3a0d9f7e209ad4b2667c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6242c19208e6e249eb071023ea248eacda3a9f43eba3a0d9f7e209ad4b2667c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6242c19208e6e249eb071023ea248eacda3a9f43eba3a0d9f7e209ad4b2667c6", kill_on_drop: false }`
[INFO] [stdout] 6242c19208e6e249eb071023ea248eacda3a9f43eba3a0d9f7e209ad4b2667c6
[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" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42d29781f05f8f29a139013f5e756d7d7b78a30fbe037319c58ee2cca505b0ec
[INFO] running `Command { std: "docker" "start" "-a" "42d29781f05f8f29a139013f5e756d7d7b78a30fbe037319c58ee2cca505b0ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]    Compiling bytecheck v0.6.12
[INFO] [stderr]    Compiling rkyv v0.7.44
[INFO] [stderr]     Checking seahash v4.1.0
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking ahash v0.7.8
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling ptr_meta_derive v0.1.4
[INFO] [stderr]    Compiling rkyv_derive v0.7.44
[INFO] [stderr]    Compiling bytecheck_derive v0.6.12
[INFO] [stderr]     Checking ptr_meta v0.1.4
[INFO] [stderr]  Documenting piecrust-uplink v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:63:1
[INFO] [stdout]    |
[INFO] [stdout] 63 | #![feature(lang_items, panic_info_message)]
[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 `piecrust-uplink`
[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=2021 --crate-type lib --crate-name piecrust_uplink src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f375e1439817c449 -L dependency=/opt/rustwide/target/debug/deps --extern bytecheck=/opt/rustwide/target/debug/deps/libbytecheck-8929f14b615562da.rmeta --extern rkyv=/opt/rustwide/target/debug/deps/librkyv-0dbfb339800a56c8.rmeta --cap-lints=warn --crate-version 0.8.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "42d29781f05f8f29a139013f5e756d7d7b78a30fbe037319c58ee2cca505b0ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42d29781f05f8f29a139013f5e756d7d7b78a30fbe037319c58ee2cca505b0ec", kill_on_drop: false }`
[INFO] [stdout] 42d29781f05f8f29a139013f5e756d7d7b78a30fbe037319c58ee2cca505b0ec
