[INFO] fetching crate screenruster-saver 0.2.2...
[INFO] documenting screenruster-saver-0.2.2 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate screenruster-saver 0.2.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate screenruster-saver 0.2.2 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate screenruster-saver 0.2.2
[INFO] finished tweaking crates.io crate screenruster-saver 0.2.2
[INFO] tweaked toml for crates.io crate screenruster-saver 0.2.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate screenruster-saver 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11916495b104765fd1b5ee413926a022f907625847a7a51393f59452593fc43b
[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" "11916495b104765fd1b5ee413926a022f907625847a7a51393f59452593fc43b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11916495b104765fd1b5ee413926a022f907625847a7a51393f59452593fc43b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11916495b104765fd1b5ee413926a022f907625847a7a51393f59452593fc43b", kill_on_drop: false }`
[INFO] [stdout] 11916495b104765fd1b5ee413926a022f907625847a7a51393f59452593fc43b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] 4c2504e3237da36fa05286b8d2262f6a975bc809c4360cb856ee3fd3ea418165
[INFO] running `Command { std: "docker" "start" "-a" "4c2504e3237da36fa05286b8d2262f6a975bc809c4360cb856ee3fd3ea418165", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]    Compiling khronos_api v3.1.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking inflate v0.1.1
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking takeable-option v0.4.0
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking json v0.12.0
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling x11 v2.18.1
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]     Checking crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]     Checking gif v0.9.2
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking crossbeam-channel v0.4.0
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking png v0.6.2
[INFO] [stderr]     Checking crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]    Compiling glium v0.25.1
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking imagefmt v4.0.0
[INFO] [stderr]     Checking xyz v0.2.1
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]    Compiling palette v0.2.1
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking jpeg-decoder v0.1.18
[INFO] [stderr]     Checking picto v0.4.3
[INFO] [stderr]  Documenting screenruster-saver v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(type_ascription)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 document `screenruster-saver`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name screenruster_saver src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="gl"' --cfg 'feature="picto"' --cfg 'feature="renderer"' --cfg 'feature="x11"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ca5d71045be4f65e -L dependency=/opt/rustwide/target/debug/deps --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-f39403dc9431b029.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-d914d383d2b06891.rmeta --extern gl=/opt/rustwide/target/debug/deps/libglium-4026aa6a2cae7f64.rmeta --extern json=/opt/rustwide/target/debug/deps/libjson-6b03ab820a521ea5.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-d26b04d82642b069.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-85102257fa40062e.rmeta --extern picto=/opt/rustwide/target/debug/deps/libpicto-2f5654c122ab24d5.rmeta --extern x11=/opt/rustwide/target/debug/deps/libx11-d0f6c4a6011f9a7d.rmeta --cap-lints=warn --crate-version 0.2.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "4c2504e3237da36fa05286b8d2262f6a975bc809c4360cb856ee3fd3ea418165", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c2504e3237da36fa05286b8d2262f6a975bc809c4360cb856ee3fd3ea418165", kill_on_drop: false }`
[INFO] [stdout] 4c2504e3237da36fa05286b8d2262f6a975bc809c4360cb856ee3fd3ea418165