[INFO] fetching crate avr-std-stub 1.0.3...
[INFO] documenting avr-std-stub-1.0.3 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate avr-std-stub 1.0.3 into /workspace/builds/worker-63/source
[INFO] validating manifest of crates.io crate avr-std-stub 1.0.3 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate avr-std-stub 1.0.3
[INFO] finished tweaking crates.io crate avr-std-stub 1.0.3
[INFO] tweaked toml for crates.io crate avr-std-stub 1.0.3 written to /workspace/builds/worker-63/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae36c41fb2c7e3a05639c86d05deec31e2f871052c69c255d98593acc8d368b9
[INFO] running `Command { std: "docker" "start" "-a" "ae36c41fb2c7e3a05639c86d05deec31e2f871052c69c255d98593acc8d368b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae36c41fb2c7e3a05639c86d05deec31e2f871052c69c255d98593acc8d368b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae36c41fb2c7e3a05639c86d05deec31e2f871052c69c255d98593acc8d368b9", kill_on_drop: false }`
[INFO] [stdout] ae36c41fb2c7e3a05639c86d05deec31e2f871052c69c255d98593acc8d368b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f88e1c063b19e63932cc7664642c516bc5fcfe48a470173500ed695fe712f79
[INFO] running `Command { std: "docker" "start" "-a" "5f88e1c063b19e63932cc7664642c516bc5fcfe48a470173500ed695fe712f79", kill_on_drop: false }`
[INFO] [stderr]  Documenting avr-std-stub v1.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(lang_items)]
[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 `avr-std-stub`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name avr_std_stub src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 1.0.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5f88e1c063b19e63932cc7664642c516bc5fcfe48a470173500ed695fe712f79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f88e1c063b19e63932cc7664642c516bc5fcfe48a470173500ed695fe712f79", kill_on_drop: false }`
[INFO] [stdout] 5f88e1c063b19e63932cc7664642c516bc5fcfe48a470173500ed695fe712f79
