[INFO] fetching crate switcheroo 0.2.9...
[INFO] documenting switcheroo-0.2.9 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate switcheroo 0.2.9 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate switcheroo 0.2.9 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 switcheroo 0.2.9
[INFO] finished tweaking crates.io crate switcheroo 0.2.9
[INFO] tweaked toml for crates.io crate switcheroo 0.2.9 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate switcheroo 0.2.9 already has a lockfile, it will not be regenerated
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] e17d950e2f868f5a3c669c4ab6f44122845fd8fcf3caaed3c3db4312f016439f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e17d950e2f868f5a3c669c4ab6f44122845fd8fcf3caaed3c3db4312f016439f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e17d950e2f868f5a3c669c4ab6f44122845fd8fcf3caaed3c3db4312f016439f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e17d950e2f868f5a3c669c4ab6f44122845fd8fcf3caaed3c3db4312f016439f", kill_on_drop: false }`
[INFO] [stdout] e17d950e2f868f5a3c669c4ab6f44122845fd8fcf3caaed3c3db4312f016439f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 767608ae9ede074b26816d94b088b9bf2885cfe77c0f8fe17f669956d3832f99
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "767608ae9ede074b26816d94b088b9bf2885cfe77c0f8fe17f669956d3832f99", kill_on_drop: false }`
[INFO] [stderr]  Documenting switcheroo v0.2.9 (/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(asm, naked_functions)]
[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 `switcheroo`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name switcheroo 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 --extern libc=/opt/rustwide/target/debug/deps/liblibc-f64d9915b2967c75.rmeta --cap-lints=warn --crate-version 0.2.9` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "767608ae9ede074b26816d94b088b9bf2885cfe77c0f8fe17f669956d3832f99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "767608ae9ede074b26816d94b088b9bf2885cfe77c0f8fe17f669956d3832f99", kill_on_drop: false }`
[INFO] [stdout] 767608ae9ede074b26816d94b088b9bf2885cfe77c0f8fe17f669956d3832f99
