[INFO] fetching crate screenruster-saver-hacks 0.2.1...
[INFO] testing screenruster-saver-hacks-0.2.1 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate screenruster-saver-hacks 0.2.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate screenruster-saver-hacks 0.2.1 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate screenruster-saver-hacks 0.2.1
[INFO] finished tweaking crates.io crate screenruster-saver-hacks 0.2.1
[INFO] tweaked toml for crates.io crate screenruster-saver-hacks 0.2.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate screenruster-saver-hacks 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3959b3c10abd7ef08032d3faf991f37972bd0891af49317b59e0b2f501421aa
[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" "e3959b3c10abd7ef08032d3faf991f37972bd0891af49317b59e0b2f501421aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3959b3c10abd7ef08032d3faf991f37972bd0891af49317b59e0b2f501421aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3959b3c10abd7ef08032d3faf991f37972bd0891af49317b59e0b2f501421aa", kill_on_drop: false }`
[INFO] [stdout] e3959b3c10abd7ef08032d3faf991f37972bd0891af49317b59e0b2f501421aa
[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" "+beta-2022-04-10" "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] 205485504c886a7da6179ce1d343e2c47c2af59b3928873ce6354734efb36e6f
[INFO] running `Command { std: "docker" "start" "-a" "205485504c886a7da6179ce1d343e2c47c2af59b3928873ce6354734efb36e6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling xml-rs v0.8.0
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling inflate v0.1.1
[INFO] [stderr]    Compiling approx v0.1.1
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling exoquant v0.2.0
[INFO] [stderr]    Compiling takeable-option v0.4.0
[INFO] [stderr]    Compiling json v0.12.0
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling x11 v2.18.1
[INFO] [stderr]    Compiling gif v0.9.2
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling num_cpus v1.11.1
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling dirs-sys v0.3.4
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling crossbeam-channel v0.4.0
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling crossbeam-deque v0.7.2
[INFO] [stderr]    Compiling glium v0.25.1
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling palette v0.2.1
[INFO] [stderr]    Compiling rayon v1.3.0
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]    Compiling png v0.6.2
[INFO] [stderr]    Compiling imagefmt v4.0.0
[INFO] [stderr]    Compiling xyz v0.2.1
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling jpeg-decoder v0.1.18
[INFO] [stderr]    Compiling picto v0.4.3
[INFO] [stderr]    Compiling screenruster-saver v0.2.2
[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/screenruster-saver-0.2.2/src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(type_ascription)]
[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 `screenruster-saver` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "205485504c886a7da6179ce1d343e2c47c2af59b3928873ce6354734efb36e6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "205485504c886a7da6179ce1d343e2c47c2af59b3928873ce6354734efb36e6f", kill_on_drop: false }`
[INFO] [stdout] 205485504c886a7da6179ce1d343e2c47c2af59b3928873ce6354734efb36e6f