[INFO] cloning repository https://github.com/kirillt/ark-tagger
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kirillt/ark-tagger" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkirillt%2Fark-tagger", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkirillt%2Fark-tagger'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1dd86d732fa4b6c344a87f6acc94f1dc3887950d
[INFO] checking kirillt/ark-tagger against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkirillt%2Fark-tagger" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kirillt/ark-tagger 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 git repo https://github.com/kirillt/ark-tagger
[INFO] finished tweaking git repo https://github.com/kirillt/ark-tagger
[INFO] tweaked toml for git repo https://github.com/kirillt/ark-tagger written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/kirillt/ark-tagger already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 80e5aafe0a80c6aa87fc729f9804845fc3df110929ba7cbeefd8220cd9d547b7
[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" "80e5aafe0a80c6aa87fc729f9804845fc3df110929ba7cbeefd8220cd9d547b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80e5aafe0a80c6aa87fc729f9804845fc3df110929ba7cbeefd8220cd9d547b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80e5aafe0a80c6aa87fc729f9804845fc3df110929ba7cbeefd8220cd9d547b7", kill_on_drop: false }`
[INFO] [stdout] 80e5aafe0a80c6aa87fc729f9804845fc3df110929ba7cbeefd8220cd9d547b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0f2bae77878b8db8225e102fcdc4bf82b9fac62f0b2f9ff9fb847fea5308f9f9
[INFO] running `Command { std: "docker" "start" "-a" "0f2bae77878b8db8225e102fcdc4bf82b9fac62f0b2f9ff9fb847fea5308f9f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking futures-timer v2.0.2
[INFO] [stderr]     Checking once_cell v1.3.1
[INFO] [stderr]     Checking iced_core v0.2.1 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]     Checking number_prefix v0.4.0
[INFO] [stderr]     Checking glam v0.8.6
[INFO] [stderr]    Compiling xcb v0.9.0
[INFO] [stderr]     Checking async-task v1.3.1
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]     Checking x11 v2.18.2
[INFO] [stderr]     Checking euclid v0.20.10
[INFO] [stderr]     Checking num-integer v0.1.42
[INFO] [stderr]     Checking ash v0.30.0
[INFO] [stderr]     Checking gfx-backend-empty v0.5.0
[INFO] [stderr]    Compiling wayland-client v0.23.6
[INFO] [stderr]    Compiling wayland-protocols v0.23.6
[INFO] [stderr]     Checking rusttype v0.8.3
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]     Checking wayland-commons v0.23.6
[INFO] [stderr]     Checking euclid v0.19.9
[INFO] [stderr]     Checking twox-hash v1.5.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling derive_more v0.99.5
[INFO] [stderr]     Checking freetype v0.4.1
[INFO] [stderr]     Checking iced_style v0.1.0 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking servo-fontconfig v0.4.0
[INFO] [stderr]     Checking rusttype v0.7.9
[INFO] [stderr]     Checking glyph_brush_layout v0.1.9
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking kv-log-macro v1.0.4
[INFO] [stderr]     Checking gfx-memory v0.1.3
[INFO] [stderr]     Checking gfx-descriptor v0.1.0
[INFO] [stderr]     Checking lyon_geom v0.14.1
[INFO] [stderr]     Checking glyph_brush v0.6.3
[INFO] [stderr]     Checking guillotiere v0.4.4
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking lyon_path v0.14.0
[INFO] [stderr]     Checking calloop v0.4.4
[INFO] [stderr]     Checking async-std v1.5.0
[INFO] [stderr]    Compiling peek-poke-derive v0.2.1
[INFO] [stderr]    Compiling zerocopy-derive v0.2.0
[INFO] [stderr]     Checking font-kit v0.4.0
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking zerocopy v0.3.0
[INFO] [stderr]     Checking peek-poke v0.2.0
[INFO] [stderr]     Checking wgpu-types v0.5.0
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking iced_futures v0.1.1 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]     Checking iced_native v0.2.1 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]     Checking clipboard_x11 v0.1.0
[INFO] [stderr]     Checking smithay-client-toolkit v0.6.6
[INFO] [stderr]     Checking smithay-clipboard v0.3.7
[INFO] [stderr]     Checking winit v0.22.1
[INFO] [stderr]     Checking clipboard_wayland v0.1.0
[INFO] [stderr]     Checking window_clipboard v0.1.1
[INFO] [stderr]     Checking gfx-backend-vulkan v0.5.2
[INFO] [stderr]     Checking wgpu-core v0.5.3
[INFO] [stderr]     Checking iced_winit v0.1.1 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]     Checking wgpu-native v0.5.0
[INFO] [stderr]     Checking wgpu v0.5.0
[INFO] [stderr]     Checking wgpu_glyph v0.8.0
[INFO] [stderr]     Checking iced_wgpu v0.2.1 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]     Checking iced v0.1.1 (https://github.com/hecrj/iced.git#edd01159)
[INFO] [stderr]     Checking ark-tagger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[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 `ark-tagger`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[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" "0f2bae77878b8db8225e102fcdc4bf82b9fac62f0b2f9ff9fb847fea5308f9f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f2bae77878b8db8225e102fcdc4bf82b9fac62f0b2f9ff9fb847fea5308f9f9", kill_on_drop: false }`
[INFO] [stdout] 0f2bae77878b8db8225e102fcdc4bf82b9fac62f0b2f9ff9fb847fea5308f9f9