[INFO] fetching crate async-wormhole 0.3.7...
[INFO] documenting async-wormhole-0.3.7 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate async-wormhole 0.3.7 into /workspace/builds/worker-96/source
[INFO] validating manifest of crates.io crate async-wormhole 0.3.7 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] started tweaking crates.io crate async-wormhole 0.3.7
[INFO] finished tweaking crates.io crate async-wormhole 0.3.7
[INFO] tweaked toml for crates.io crate async-wormhole 0.3.7 written to /workspace/builds/worker-96/source/Cargo.toml
[INFO] crate crates.io crate async-wormhole 0.3.7 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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] 3b06eec9482100a43476be2039a29d84fce96827fbe5844687b3a6ed2bd2539e
[INFO] running `Command { std: "docker" "start" "-a" "3b06eec9482100a43476be2039a29d84fce96827fbe5844687b3a6ed2bd2539e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b06eec9482100a43476be2039a29d84fce96827fbe5844687b3a6ed2bd2539e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b06eec9482100a43476be2039a29d84fce96827fbe5844687b3a6ed2bd2539e", kill_on_drop: false }`
[INFO] [stdout] 3b06eec9482100a43476be2039a29d84fce96827fbe5844687b3a6ed2bd2539e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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] 8443574be29e9e8188668fad3c9bafaf26d6b0bd5101cfdd8f42044322a847e8
[INFO] running `Command { std: "docker" "start" "-a" "8443574be29e9e8188668fad3c9bafaf26d6b0bd5101cfdd8f42044322a847e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]     Checking switcheroo v0.2.9
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/switcheroo-0.2.9/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(asm, naked_functions)]
[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 compile `switcheroo`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "8443574be29e9e8188668fad3c9bafaf26d6b0bd5101cfdd8f42044322a847e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8443574be29e9e8188668fad3c9bafaf26d6b0bd5101cfdd8f42044322a847e8", kill_on_drop: false }`
[INFO] [stdout] 8443574be29e9e8188668fad3c9bafaf26d6b0bd5101cfdd8f42044322a847e8
