[INFO] fetching crate itui 0.7.0...
[INFO] testing itui-0.7.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate itui 0.7.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate itui 0.7.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-12/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" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spin v0.5.0
[INFO] [stderr]   Downloaded gag v0.1.10
[INFO] [stderr]   Downloaded wincolor v0.1.6
[INFO] [stderr]   Downloaded rand_chacha v0.2.1
[INFO] [stderr]   Downloaded pancurses v0.16.1
[INFO] [stderr]   Downloaded bitflags v0.2.1
[INFO] [stderr]   Downloaded c2-chacha v0.2.2
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.5
[INFO] [stderr]   Downloaded either v1.5.2
[INFO] [stderr]   Downloaded rustc-demangle v0.1.15
[INFO] [stderr]   Downloaded crossterm_utils v0.2.4
[INFO] [stderr]   Downloaded winreg v0.5.1
[INFO] [stderr]   Downloaded autocfg v0.1.5
[INFO] [stderr]   Downloaded stderrlog v0.4.1
[INFO] [stderr]   Downloaded termbox-sys v0.2.11
[INFO] [stderr]   Downloaded chrono v0.4.7
[INFO] [stderr]   Downloaded rand_core v0.4.0
[INFO] [stderr]   Downloaded crossterm_winapi v0.1.5
[INFO] [stderr]   Downloaded rustbox v0.11.0
[INFO] [stderr]   Downloaded rand v0.7.0
[INFO] [stderr]   Downloaded unicode-segmentation v1.3.0
[INFO] [stderr]   Downloaded libc v0.2.60
[INFO] [stderr]   Downloaded termion v1.5.3
[INFO] [stderr]   Downloaded redox_termios v0.1.1
[INFO] [stderr]   Downloaded unicode-width v0.1.5
[INFO] [stderr]   Downloaded pdcurses-sys v0.7.1
[INFO] [stderr]   Downloaded rand_core v0.5.0
[INFO] [stderr]   Downloaded ncurses v5.99.0
[INFO] [stderr]   Downloaded pkg-config v0.3.15
[INFO] [stderr]   Downloaded log v0.4.7
[INFO] [stderr]   Downloaded getrandom v0.1.6
[INFO] [stderr]   Downloaded lazy_static v1.3.0
[INFO] [stderr]   Downloaded termcolor v0.3.6
[INFO] [stderr]   Downloaded syn v0.15.42
[INFO] [stderr]   Downloaded winapi v0.3.7
[INFO] [stderr]   Downloaded crossterm_screen v0.2.4
[INFO] [stderr]   Downloaded crossterm v0.9.6
[INFO] [stderr]   Downloaded crossterm_input v0.3.8
[INFO] [stderr]   Downloaded crossterm_style v0.3.4
[INFO] [stderr]   Downloaded easycurses v0.12.2
[INFO] [stderr]   Downloaded sauron_vdom v0.10.0
[INFO] [stderr]   Downloaded crossterm_cursor v0.2.5
[INFO] [stderr]   Downloaded crossterm_terminal v0.2.5
[INFO] [stderr]   Downloaded backtrace v0.3.33
[INFO] [stderr]   Downloaded cc v1.0.38
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79dedc1690b2e02b7a99427f9800a4a8786337767aca74ce01a7343497940f01
[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" "79dedc1690b2e02b7a99427f9800a4a8786337767aca74ce01a7343497940f01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79dedc1690b2e02b7a99427f9800a4a8786337767aca74ce01a7343497940f01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79dedc1690b2e02b7a99427f9800a4a8786337767aca74ce01a7343497940f01", kill_on_drop: false }`
[INFO] [stdout] 79dedc1690b2e02b7a99427f9800a4a8786337767aca74ce01a7343497940f01
[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=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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--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] 18ad1b798cda1713b95b71d7cf158dc4ce18f141239d59ee4ae619fe33d9cd93
[INFO] running `Command { std: "docker" "start" "-a" "18ad1b798cda1713b95b71d7cf158dc4ce18f141239d59ee4ae619fe33d9cd93", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling sauron_vdom v0.10.0
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable 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" "18ad1b798cda1713b95b71d7cf158dc4ce18f141239d59ee4ae619fe33d9cd93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18ad1b798cda1713b95b71d7cf158dc4ce18f141239d59ee4ae619fe33d9cd93", kill_on_drop: false }`
[INFO] [stdout] 18ad1b798cda1713b95b71d7cf158dc4ce18f141239d59ee4ae619fe33d9cd93