[INFO] fetching crate itui 0.7.0...
[INFO] checking itui-0.7.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate itui 0.7.0 into /workspace/builds/worker-52/source
[INFO] validating manifest of crates.io crate itui 0.7.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-52/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" "+1.55.0" "fetch" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded redox_termios v0.1.1
[INFO] [stderr]   Downloaded numtoa v0.1.0
[INFO] [stderr]   Downloaded unicode-width v0.1.5
[INFO] [stderr]   Downloaded unicode-xid v0.1.0
[INFO] [stderr]   Downloaded cloudabi v0.0.3
[INFO] [stderr]   Downloaded libc v0.2.60
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[INFO] [stderr]   Downloaded rand_core v0.5.0
[INFO] [stderr]   Downloaded rand_xorshift v0.1.1
[INFO] [stderr]   Downloaded bitflags v0.2.1
[INFO] [stderr]   Downloaded rand_core v0.4.0
[INFO] [stderr]   Downloaded rand_chacha v0.1.1
[INFO] [stderr]   Downloaded either v1.5.2
[INFO] [stderr]   Downloaded rustc-demangle v0.1.15
[INFO] [stderr]   Downloaded failure v0.1.5
[INFO] [stderr]   Downloaded rand_os v0.1.3
[INFO] [stderr]   Downloaded crossterm v0.9.6
[INFO] [stderr]   Downloaded cassowary v0.3.0
[INFO] [stderr]   Downloaded atty v0.2.13
[INFO] [stderr]   Downloaded crossterm_utils v0.2.4
[INFO] [stderr]   Downloaded cfg-if v0.1.9
[INFO] [stderr]   Downloaded rand_jitter v0.1.4
[INFO] [stderr]   Downloaded rand_isaac v0.1.1
[INFO] [stderr]   Downloaded rand_pcg v0.1.2
[INFO] [stderr]   Downloaded cc v1.0.38
[INFO] [stderr]   Downloaded synstructure v0.10.2
[INFO] [stderr]   Downloaded crossterm_winapi v0.1.5
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[INFO] [stderr]   Downloaded pancurses v0.16.1
[INFO] [stderr]   Downloaded rand_hc v0.2.0
[INFO] [stderr]   Downloaded itertools v0.8.0
[INFO] [stderr]   Downloaded rand v0.6.5
[INFO] [stderr]   Downloaded c2-chacha v0.2.2
[INFO] [stderr]   Downloaded getrandom v0.1.6
[INFO] [stderr]   Downloaded termbox-sys v0.2.11
[INFO] [stderr]   Downloaded vec_map v0.8.1
[INFO] [stderr]   Downloaded num-traits v0.2.8
[INFO] [stderr]   Downloaded rand_hc v0.1.0
[INFO] [stderr]   Downloaded remove_dir_all v0.5.2
[INFO] [stderr]   Downloaded chrono v0.4.7
[INFO] [stderr]   Downloaded pkg-config v0.3.15
[INFO] [stderr]   Downloaded clap v2.33.0
[INFO] [stderr]   Downloaded unicode-segmentation v1.3.0
[INFO] [stderr]   Downloaded pdcurses-sys v0.7.1
[INFO] [stderr]   Downloaded lazy_static v1.3.0
[INFO] [stderr]   Downloaded heck v0.3.1
[INFO] [stderr]   Downloaded redox_syscall v0.1.56
[INFO] [stderr]   Downloaded proc-macro2 v0.4.30
[INFO] [stderr]   Downloaded time v0.1.42
[INFO] [stderr]   Downloaded num-traits v0.1.43
[INFO] [stderr]   Downloaded quote v0.6.13
[INFO] [stderr]   Downloaded bitflags v1.1.0
[INFO] [stderr]   Downloaded structopt v0.2.18
[INFO] [stderr]   Downloaded termion v1.5.3
[INFO] [stderr]   Downloaded crossterm_terminal v0.2.5
[INFO] [stderr]   Downloaded autocfg v0.1.5
[INFO] [stderr]   Downloaded rustbox v0.11.0
[INFO] [stderr]   Downloaded failure_derive v0.1.5
[INFO] [stderr]   Downloaded ncurses v5.99.0
[INFO] [stderr]   Downloaded stderrlog v0.4.1
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.5
[INFO] [stderr]   Downloaded rand_chacha v0.2.1
[INFO] [stderr]   Downloaded rand v0.7.0
[INFO] [stderr]   Downloaded tempfile v3.1.0
[INFO] [stderr]   Downloaded gag v0.1.10
[INFO] [stderr]   Downloaded termcolor v0.3.6
[INFO] [stderr]   Downloaded winapi v0.3.7
[INFO] [stderr]   Downloaded log v0.4.7
[INFO] [stderr]   Downloaded wincolor v0.1.6
[INFO] [stderr]   Downloaded spin v0.5.0
[INFO] [stderr]   Downloaded thread_local v0.3.6
[INFO] [stderr]   Downloaded syn v0.15.42
[INFO] [stderr]   Downloaded structopt-derive v0.2.18
[INFO] [stderr]   Downloaded crossterm_cursor v0.2.5
[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 crossterm_screen v0.2.4
[INFO] [stderr]   Downloaded sauron_vdom v0.10.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5719650b6ee52cdc5d7107a033dea1ae3211b9da3354801ae2d77f2e04bc539
[INFO] running `Command { std: "docker" "start" "-a" "f5719650b6ee52cdc5d7107a033dea1ae3211b9da3354801ae2d77f2e04bc539", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5719650b6ee52cdc5d7107a033dea1ae3211b9da3354801ae2d77f2e04bc539", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5719650b6ee52cdc5d7107a033dea1ae3211b9da3354801ae2d77f2e04bc539", kill_on_drop: false }`
[INFO] [stdout] f5719650b6ee52cdc5d7107a033dea1ae3211b9da3354801ae2d77f2e04bc539
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c0752aabce771dc20b40f47fe7bab85a152e8b3aafb782b269925a1123c086c
[INFO] running `Command { std: "docker" "start" "-a" "2c0752aabce771dc20b40f47fe7bab85a152e8b3aafb782b269925a1123c086c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling cc v1.0.38
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking rustc-demangle v0.1.15
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]     Checking sauron_vdom v0.10.0
[INFO] [stderr]     Checking termcolor v0.3.6
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking termion v1.5.3
[INFO] [stderr]     Checking textwrap v0.11.0
[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]     Checking 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" "2c0752aabce771dc20b40f47fe7bab85a152e8b3aafb782b269925a1123c086c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c0752aabce771dc20b40f47fe7bab85a152e8b3aafb782b269925a1123c086c", kill_on_drop: false }`
[INFO] [stdout] 2c0752aabce771dc20b40f47fe7bab85a152e8b3aafb782b269925a1123c086c
