[INFO] fetching crate chessground 0.8.0...
[INFO] checking chessground-0.8.0 against beta for pr-78714
[INFO] extracting crate chessground 0.8.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate chessground 0.8.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chessground 0.8.0
[INFO] finished tweaking crates.io crate chessground 0.8.0
[INFO] tweaked toml for crates.io crate chessground 0.8.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded relm-derive v0.14.6
[INFO] [stderr]   Downloaded relm-gen-widget v0.14.6
[INFO] [stderr]   Downloaded relm-core v0.14.6
[INFO] [stderr]   Downloaded relm v0.14.6
[INFO] [stderr]   Downloaded gtk v0.4.1
[INFO] [stderr]   Downloaded relm-state v0.14.6
[INFO] [stderr]   Downloaded relm-attributes v0.14.6
[INFO] [stderr]   Downloaded relm-derive-common v0.14.6
[INFO] [stderr]   Downloaded gio v0.4.1
[INFO] [stderr]   Downloaded option-filter v1.0.2
[INFO] [stderr]   Downloaded btoi v0.3.0
[INFO] [stderr]   Downloaded rsvg-sys v0.6.0
[INFO] [stderr]   Downloaded rsvg v0.4.0
[INFO] [stderr]   Downloaded shakmaty v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 68bb866b90fd51ce4849ee3015b08aebe1964d8537206088b24a09d354e56bb9
[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" "68bb866b90fd51ce4849ee3015b08aebe1964d8537206088b24a09d354e56bb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68bb866b90fd51ce4849ee3015b08aebe1964d8537206088b24a09d354e56bb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68bb866b90fd51ce4849ee3015b08aebe1964d8537206088b24a09d354e56bb9", kill_on_drop: false }`
[INFO] [stdout] 68bb866b90fd51ce4849ee3015b08aebe1964d8537206088b24a09d354e56bb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "RUSTFLAGS=--cap-lints=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91264d3ff50a5fec96ccf47a56f5c90309ee6df4b4992f16ca98ad3a2bdf8311
[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" "91264d3ff50a5fec96ccf47a56f5c90309ee6df4b4992f16ca98ad3a2bdf8311", kill_on_drop: false }`
[INFO] [stderr]    Compiling gio v0.4.1
[INFO] [stderr]    Compiling cairo-rs v0.4.1
[INFO] [stderr]    Compiling gdk-pixbuf v0.4.0
[INFO] [stderr]     Checking c_vec v1.3.3
[INFO] [stderr]    Compiling gdk v0.8.0
[INFO] [stderr]    Compiling gtk v0.4.1
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking option-filter v1.0.2
[INFO] [stderr]    Compiling glib-sys v0.6.0
[INFO] [stderr]    Compiling gobject-sys v0.6.0
[INFO] [stderr]    Compiling gio-sys v0.6.0
[INFO] [stderr]    Compiling cairo-sys-rs v0.6.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.6.0
[INFO] [stderr]    Compiling pango-sys v0.6.0
[INFO] [stderr]    Compiling gdk-sys v0.6.0
[INFO] [stderr]    Compiling atk-sys v0.6.0
[INFO] [stderr]    Compiling gtk-sys v0.6.0
[INFO] [stderr]    Compiling rsvg-sys v0.6.0
[INFO] [stderr]    Compiling shakmaty v0.8.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking btoi v0.3.0
[INFO] [stderr]     Checking glib v0.5.0
[INFO] [stderr]     Checking pango v0.4.0
[INFO] [stderr]    Compiling relm-gen-widget v0.14.6
[INFO] [stderr]    Compiling relm-derive-common v0.14.6
[INFO] [stderr]     Checking rsvg v0.4.0
[INFO] [stderr]    Compiling relm-derive v0.14.6
[INFO] [stderr]    Compiling relm-attributes v0.14.6
[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/relm-attributes-0.14.6/src/lib.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | #![feature(proc_macro)]
[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 `relm-attributes`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "91264d3ff50a5fec96ccf47a56f5c90309ee6df4b4992f16ca98ad3a2bdf8311", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91264d3ff50a5fec96ccf47a56f5c90309ee6df4b4992f16ca98ad3a2bdf8311", kill_on_drop: false }`
[INFO] [stdout] 91264d3ff50a5fec96ccf47a56f5c90309ee6df4b4992f16ca98ad3a2bdf8311