[INFO] fetching crate itui 0.7.0...
[INFO] testing itui-0.7.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate itui 0.7.0 into /workspace/builds/worker-23/source
[INFO] validating manifest of crates.io crate itui 0.7.0 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 itui 0.7.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate itui 0.7.0
[INFO] tweaked toml for crates.io crate itui 0.7.0 written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate crates.io crate itui 0.7.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossterm v0.9.6
[INFO] [stderr]   Downloaded crossterm_winapi v0.1.5
[INFO] [stderr]   Downloaded log v0.4.7
[INFO] [stderr]   Downloaded spin v0.5.0
[INFO] [stderr]   Downloaded pancurses v0.16.1
[INFO] [stderr]   Downloaded ncurses v5.99.0
[INFO] [stderr]   Downloaded crossterm_utils v0.2.4
[INFO] [stderr]   Downloaded pdcurses-sys v0.7.1
[INFO] [stderr]   Downloaded crossterm_input v0.3.8
[INFO] [stderr]   Downloaded crossterm_screen v0.2.4
[INFO] [stderr]   Downloaded crossterm_style v0.3.4
[INFO] [stderr]   Downloaded crossterm_cursor v0.2.5
[INFO] [stderr]   Downloaded easycurses v0.12.2
[INFO] [stderr]   Downloaded sauron_vdom v0.10.0
[INFO] [stderr]   Downloaded stderrlog v0.4.1
[INFO] [stderr]   Downloaded termbox-sys v0.2.11
[INFO] [stderr]   Downloaded crossterm_terminal v0.2.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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] 085c442bbd6ebd6f57301599d37675179f4ad5efc2bcd3f51bf7f85f6dbbc5f2
[INFO] running `Command { std: "docker" "start" "-a" "085c442bbd6ebd6f57301599d37675179f4ad5efc2bcd3f51bf7f85f6dbbc5f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "085c442bbd6ebd6f57301599d37675179f4ad5efc2bcd3f51bf7f85f6dbbc5f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "085c442bbd6ebd6f57301599d37675179f4ad5efc2bcd3f51bf7f85f6dbbc5f2", kill_on_drop: false }`
[INFO] [stdout] 085c442bbd6ebd6f57301599d37675179f4ad5efc2bcd3f51bf7f85f6dbbc5f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "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" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ddedc2d73edce27551b23e264e57f9258d41ad44607c8821fe1d1e0212369cea
[INFO] running `Command { std: "docker" "start" "-a" "ddedc2d73edce27551b23e264e57f9258d41ad44607c8821fe1d1e0212369cea", 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] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling cassowary v0.3.0
[INFO] [stderr]    Compiling sauron_vdom v0.10.0
[INFO] [stderr]    Compiling unicode-width v0.1.5
[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/sauron_vdom-0.10.0/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(arbitrary_self_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling itertools v0.8.0
[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 `sauron_vdom` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ddedc2d73edce27551b23e264e57f9258d41ad44607c8821fe1d1e0212369cea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddedc2d73edce27551b23e264e57f9258d41ad44607c8821fe1d1e0212369cea", kill_on_drop: false }`
[INFO] [stdout] ddedc2d73edce27551b23e264e57f9258d41ad44607c8821fe1d1e0212369cea
