[INFO] fetching crate frui_widgets 0.0.1...
[INFO] documenting frui_widgets-0.0.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate frui_widgets 0.0.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate frui_widgets 0.0.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate frui_widgets 0.0.1
[INFO] finished tweaking crates.io crate frui_widgets 0.0.1
[INFO] tweaked toml for crates.io crate frui_widgets 0.0.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gdk-pixbuf-sys v0.10.0
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[INFO] [stderr]   Downloaded gio-sys v0.10.1
[INFO] [stderr]   Downloaded cairo-rs v0.9.1
[INFO] [stderr]   Downloaded druid-shell v0.7.0
[INFO] [stderr]   Downloaded gdk-pixbuf v0.9.0
[INFO] [stderr]   Downloaded simplelog v0.12.1
[INFO] [stderr]   Downloaded core-text v19.2.0
[INFO] [stderr]   Downloaded dwrote v0.11.0
[INFO] [stderr]   Downloaded frui_macros v0.0.1
[INFO] [stderr]   Downloaded piet-common v0.3.2
[INFO] [stderr]   Downloaded system-deps v1.3.2
[INFO] [stderr]   Downloaded cairo-sys-rs v0.10.0
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[INFO] [stderr]   Downloaded pango-sys v0.10.0
[INFO] [stderr]   Downloaded frui_core v0.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2d9c3da75a218640c833a51b0b896dec58f5632e99c4b67b1ba1b8b38c0e34c7
[INFO] running `Command { std: "docker" "start" "-a" "2d9c3da75a218640c833a51b0b896dec58f5632e99c4b67b1ba1b8b38c0e34c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2d9c3da75a218640c833a51b0b896dec58f5632e99c4b67b1ba1b8b38c0e34c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d9c3da75a218640c833a51b0b896dec58f5632e99c4b67b1ba1b8b38c0e34c7", kill_on_drop: false }`
[INFO] [stdout] 2d9c3da75a218640c833a51b0b896dec58f5632e99c4b67b1ba1b8b38c0e34c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b24517dad6c2d164d9c946e4614c9fe049afeb14cc8ba23af31c72a82d235ad3
[INFO] running `Command { std: "docker" "start" "-a" "b24517dad6c2d164d9c946e4614c9fe049afeb14cc8ba23af31c72a82d235ad3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling pkg-config v0.3.28
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling strum v0.18.0
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling cairo-rs v0.9.1
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]    Compiling gio v0.9.1
[INFO] [stderr]     Checking unic-ucd-bidi v0.9.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]    Compiling gdk-pixbuf v0.9.0
[INFO] [stderr]    Compiling pango v0.9.1
[INFO] [stderr]     Checking unic-bidi v0.9.0
[INFO] [stderr]     Checking kurbo v0.7.1
[INFO] [stderr]    Compiling const_fn v0.4.9
[INFO] [stderr]    Compiling gdk v0.13.2
[INFO] [stderr]    Compiling atk v0.9.0
[INFO] [stderr]     Checking piet v0.3.1
[INFO] [stderr]    Compiling gtk v0.9.2
[INFO] [stderr]    Compiling time v0.2.27
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]     Checking xi-unicode v0.2.1
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]    Compiling time-macros v0.2.16
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking keyboard-types v0.5.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]     Checking time v0.3.31
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]     Checking simplelog v0.12.1
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling glib-macros v0.10.1
[INFO] [stderr]    Compiling time-macros-impl v0.1.2
[INFO] [stderr]    Compiling frui_macros v0.0.1
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]    Compiling system-deps v1.3.2
[INFO] [stderr]    Compiling glib-sys v0.10.1
[INFO] [stderr]    Compiling gobject-sys v0.10.0
[INFO] [stderr]    Compiling gio-sys v0.10.1
[INFO] [stderr]    Compiling cairo-sys-rs v0.10.0
[INFO] [stderr]    Compiling pango-sys v0.10.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.10.0
[INFO] [stderr]    Compiling gdk-sys v0.10.0
[INFO] [stderr]    Compiling atk-sys v0.10.0
[INFO] [stderr]    Compiling gtk-sys v0.10.0
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking glib v0.10.3
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking piet-cairo v0.3.0
[INFO] [stderr]     Checking piet-common v0.3.2
[INFO] [stderr]     Checking druid-shell v0.7.0
[INFO] [stderr]     Checking frui_core v0.0.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/frui_core-0.0.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(auto_traits)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/frui_core-0.0.1/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(negative_impls)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/frui_core-0.0.1/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/frui_core-0.0.1/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 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 compile `frui_core` (lib) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "b24517dad6c2d164d9c946e4614c9fe049afeb14cc8ba23af31c72a82d235ad3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b24517dad6c2d164d9c946e4614c9fe049afeb14cc8ba23af31c72a82d235ad3", kill_on_drop: false }`
[INFO] [stdout] b24517dad6c2d164d9c946e4614c9fe049afeb14cc8ba23af31c72a82d235ad3
[INFO] documenting frui_widgets-0.0.1 against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] extracting crate frui_widgets 0.0.1 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate frui_widgets 0.0.1 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate frui_widgets 0.0.1
[INFO] finished tweaking crates.io crate frui_widgets 0.0.1
[INFO] tweaked toml for crates.io crate frui_widgets 0.0.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a94c1aad05339b39feb00b4ada7ed31b90471c6cb3fea555c9760969305fabd7
[INFO] running `Command { std: "docker" "start" "-a" "a94c1aad05339b39feb00b4ada7ed31b90471c6cb3fea555c9760969305fabd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a94c1aad05339b39feb00b4ada7ed31b90471c6cb3fea555c9760969305fabd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a94c1aad05339b39feb00b4ada7ed31b90471c6cb3fea555c9760969305fabd7", kill_on_drop: false }`
[INFO] [stdout] a94c1aad05339b39feb00b4ada7ed31b90471c6cb3fea555c9760969305fabd7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aeb530f694e2b11828703712aa1d522f6b2c85b0553cc7789b1cb5871f2784d7
[INFO] running `Command { std: "docker" "start" "-a" "aeb530f694e2b11828703712aa1d522f6b2c85b0553cc7789b1cb5871f2784d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling pkg-config v0.3.28
[INFO] [stderr]    Compiling strum v0.18.0
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]    Compiling cairo-rs v0.9.1
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]    Compiling gio v0.9.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]     Checking unic-ucd-bidi v0.9.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]    Compiling pango v0.9.1
[INFO] [stderr]    Compiling gdk-pixbuf v0.9.0
[INFO] [stderr]     Checking unic-bidi v0.9.0
[INFO] [stderr]     Checking kurbo v0.7.1
[INFO] [stderr]    Compiling atk v0.9.0
[INFO] [stderr]    Compiling const_fn v0.4.9
[INFO] [stderr]    Compiling gdk v0.13.2
[INFO] [stderr]    Compiling gtk v0.9.2
[INFO] [stderr]     Checking piet v0.3.1
[INFO] [stderr]    Compiling time v0.2.27
[INFO] [stderr]     Checking xi-unicode v0.2.1
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]    Compiling time-macros v0.2.16
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking keyboard-types v0.5.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]     Checking time v0.3.31
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]     Checking simplelog v0.12.1
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling time-macros-impl v0.1.2
[INFO] [stderr]    Compiling frui_macros v0.0.1
[INFO] [stderr]    Compiling glib-macros v0.10.1
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]    Compiling system-deps v1.3.2
[INFO] [stderr]    Compiling glib-sys v0.10.1
[INFO] [stderr]    Compiling gobject-sys v0.10.0
[INFO] [stderr]    Compiling gio-sys v0.10.1
[INFO] [stderr]    Compiling cairo-sys-rs v0.10.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.10.0
[INFO] [stderr]    Compiling pango-sys v0.10.0
[INFO] [stderr]    Compiling gdk-sys v0.10.0
[INFO] [stderr]    Compiling atk-sys v0.10.0
[INFO] [stderr]    Compiling gtk-sys v0.10.0
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking glib v0.10.3
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking piet-cairo v0.3.0
[INFO] [stderr]     Checking piet-common v0.3.2
[INFO] [stderr]     Checking druid-shell v0.7.0
[INFO] [stderr]     Checking frui_core v0.0.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/frui_core-0.0.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(auto_traits)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/frui_core-0.0.1/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(negative_impls)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/frui_core-0.0.1/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/frui_core-0.0.1/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 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 compile `frui_core` (lib) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "aeb530f694e2b11828703712aa1d522f6b2c85b0553cc7789b1cb5871f2784d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aeb530f694e2b11828703712aa1d522f6b2c85b0553cc7789b1cb5871f2784d7", kill_on_drop: false }`
[INFO] [stdout] aeb530f694e2b11828703712aa1d522f6b2c85b0553cc7789b1cb5871f2784d7
