[INFO] fetching crate ckb-std 0.7.4...
[INFO] documenting ckb-std-0.7.4 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate ckb-std 0.7.4 into /workspace/builds/worker-75/source
[INFO] validating manifest of crates.io crate ckb-std 0.7.4 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-75/source/rust-toolchain
[INFO] started tweaking crates.io crate ckb-std 0.7.4
[INFO] finished tweaking crates.io crate ckb-std 0.7.4
[INFO] tweaked toml for crates.io crate ckb-std 0.7.4 written to /workspace/builds/worker-75/source/Cargo.toml
[INFO] crate crates.io crate ckb-std 0.7.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded scroll_derive v0.10.4
[INFO] [stderr]   Downloaded enum-display-derive v0.1.0
[INFO] [stderr]   Downloaded buddy-alloc v0.4.1
[INFO] [stderr]   Downloaded ckb-x64-simulator v0.4.0
[INFO] [stderr]   Downloaded ckb-standalone-types v0.0.1-pre.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1eb824326f6bf2c4e9e59a31b07cc73f386084f92bbaab96147ab4adc6195662
[INFO] running `Command { std: "docker" "start" "-a" "1eb824326f6bf2c4e9e59a31b07cc73f386084f92bbaab96147ab4adc6195662", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1eb824326f6bf2c4e9e59a31b07cc73f386084f92bbaab96147ab4adc6195662", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eb824326f6bf2c4e9e59a31b07cc73f386084f92bbaab96147ab4adc6195662", kill_on_drop: false }`
[INFO] [stdout] 1eb824326f6bf2c4e9e59a31b07cc73f386084f92bbaab96147ab4adc6195662
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] baa7e6a78ae15ce31efb3ac7f913182ed0d4d08b0fbae6bb1dd395a463a9bbaf
[INFO] running `Command { std: "docker" "start" "-a" "baa7e6a78ae15ce31efb3ac7f913182ed0d4d08b0fbae6bb1dd395a463a9bbaf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cc v1.0.41
[INFO] [stderr]     Checking buddy-alloc v0.4.1
[INFO] [stderr]     Checking molecule v0.6.0
[INFO] [stderr]     Checking ckb-standalone-types v0.0.1-pre.1
[INFO] [stderr]    Compiling ckb-std v0.7.4 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting ckb-std v0.7.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(llvm_asm)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 `ckb-std`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name ckb_std src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="allocator"' --cfg 'feature="buddy-alloc"' --cfg 'feature="ckb-types"' --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern buddy_alloc=/opt/rustwide/target/debug/deps/libbuddy_alloc-476dd1a0cdf1cad3.rmeta --extern ckb_types=/opt/rustwide/target/debug/deps/libckb_standalone_types-177ad46d1a72b41a.rmeta --cap-lints=warn --crate-version 0.7.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "baa7e6a78ae15ce31efb3ac7f913182ed0d4d08b0fbae6bb1dd395a463a9bbaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "baa7e6a78ae15ce31efb3ac7f913182ed0d4d08b0fbae6bb1dd395a463a9bbaf", kill_on_drop: false }`
[INFO] [stdout] baa7e6a78ae15ce31efb3ac7f913182ed0d4d08b0fbae6bb1dd395a463a9bbaf
