[INFO] fetching crate pebble-skip 0.0.1...
[INFO] documenting pebble-skip-0.0.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate pebble-skip 0.0.1 into /workspace/builds/worker-79/source
[INFO] validating manifest of crates.io crate pebble-skip 0.0.1 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 pebble-skip 0.0.1
[INFO] finished tweaking crates.io crate pebble-skip 0.0.1
[INFO] tweaked toml for crates.io crate pebble-skip 0.0.1 written to /workspace/builds/worker-79/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded debugless-unwrap v0.0.4
[INFO] [stderr]   Downloaded pebble-sys v0.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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] 05563bc4862764c05108023e1fc1dc95ae43215e22616ef823aef2de1f4faaf7
[INFO] running `Command { std: "docker" "start" "-a" "05563bc4862764c05108023e1fc1dc95ae43215e22616ef823aef2de1f4faaf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05563bc4862764c05108023e1fc1dc95ae43215e22616ef823aef2de1f4faaf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05563bc4862764c05108023e1fc1dc95ae43215e22616ef823aef2de1f4faaf7", kill_on_drop: false }`
[INFO] [stdout] 05563bc4862764c05108023e1fc1dc95ae43215e22616ef823aef2de1f4faaf7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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] 2443ad30a0400ca994281b9d93d5c1035b955d5a9c5a5a673e0625f7bcc96091
[INFO] running `Command { std: "docker" "start" "-a" "2443ad30a0400ca994281b9d93d5c1035b955d5a9c5a5a673e0625f7bcc96091", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking pebble-sys v0.0.1
[INFO] [stderr]     Checking debugless-unwrap v0.0.4
[INFO] [stderr]     Checking unsafe_unwrap v0.1.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pebble-sys-0.0.1/src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(extern_types)]
[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 `pebble-sys` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "2443ad30a0400ca994281b9d93d5c1035b955d5a9c5a5a673e0625f7bcc96091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2443ad30a0400ca994281b9d93d5c1035b955d5a9c5a5a673e0625f7bcc96091", kill_on_drop: false }`
[INFO] [stdout] 2443ad30a0400ca994281b9d93d5c1035b955d5a9c5a5a673e0625f7bcc96091
