[INFO] fetching crate sgf-render 1.3.0...
[INFO] testing sgf-render-1.3.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate sgf-render 1.3.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate sgf-render 1.3.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sgf-render 1.3.0
[INFO] finished tweaking crates.io crate sgf-render 1.3.0
[INFO] tweaked toml for crates.io crate sgf-render 1.3.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate sgf-render 1.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-bidi-mirroring v0.1.0
[INFO] [stderr]   Downloaded ttf-parser v0.9.0
[INFO] [stderr]   Downloaded fontdb v0.3.0
[INFO] [stderr]   Downloaded unicode-general-category v0.2.0
[INFO] [stderr]   Downloaded kurbo v0.7.1
[INFO] [stderr]   Downloaded rustybuzz v0.3.0
[INFO] [stderr]   Downloaded sgf-parse v2.0.1
[INFO] [stderr]   Downloaded unicode-ccc v0.1.0
[INFO] [stderr]   Downloaded svg v0.8.0
[INFO] [stderr]   Downloaded tiny-skia v0.2.0
[INFO] [stderr]   Downloaded svgfilters v0.2.0
[INFO] [stderr]   Downloaded resvg v0.12.0
[INFO] [stderr]   Downloaded usvg v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7a1ddb3b672ebceaa5e6388afbe21e3e8a83ae044779173527912fe011c22f7e
[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" "7a1ddb3b672ebceaa5e6388afbe21e3e8a83ae044779173527912fe011c22f7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a1ddb3b672ebceaa5e6388afbe21e3e8a83ae044779173527912fe011c22f7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a1ddb3b672ebceaa5e6388afbe21e3e8a83ae044779173527912fe011c22f7e", kill_on_drop: false }`
[INFO] [stdout] 7a1ddb3b672ebceaa5e6388afbe21e3e8a83ae044779173527912fe011c22f7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1d8cfea8467cadcc2365353dd823abe615586e4e8a92cc942191fe7ff0b94f1
[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" "a1d8cfea8467cadcc2365353dd823abe615586e4e8a92cc942191fe7ff0b94f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling bytemuck v1.4.1
[INFO] [stderr]    Compiling unicode-general-category v0.2.0
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling float-cmp v0.5.3
[INFO] [stderr]    Compiling ttf-parser v0.9.0
[INFO] [stderr]    Compiling unicode-ccc v0.1.0
[INFO] [stderr]    Compiling xmlparser v0.13.3
[INFO] [stderr]    Compiling smallvec v1.5.1
[INFO] [stderr]    Compiling unicode-script v0.5.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling unicode-bidi-mirroring v0.1.0
[INFO] [stderr]    Compiling rctree v0.3.3
[INFO] [stderr]    Compiling xmlwriter v0.1.0
[INFO] [stderr]    Compiling unicode-vo v0.1.0
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling pico-args v0.3.4
[INFO] [stderr]    Compiling sgf-parse v2.0.1
[INFO] [stderr]    Compiling svg v0.8.0
[INFO] [stderr]    Compiling data-url v0.1.0
[INFO] [stderr]    Compiling miniz_oxide v0.3.7
[INFO] [stderr]    Compiling svgtypes v0.5.0
[INFO] [stderr]    Compiling safe_arch v0.5.2
[INFO] [stderr]    Compiling rgb v0.8.25
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling kurbo v0.7.1
[INFO] [stderr]    Compiling roxmltree v0.13.0
[INFO] [stderr]    Compiling deflate v0.8.6
[INFO] [stderr]    Compiling jpeg-decoder v0.1.20
[INFO] [stderr]    Compiling simplecss v0.2.0
[INFO] [stderr]    Compiling wide v0.6.4
[INFO] [stderr]    Compiling svgfilters v0.2.0
[INFO] [stderr]    Compiling png v0.16.7
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling memmap2 v0.1.0
[INFO] [stderr]    Compiling flate2 v1.0.19
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tiny-skia v0.2.0
[INFO] [stderr]    Compiling rustybuzz v0.3.0
[INFO] [stderr]    Compiling uuid v0.8.1
[INFO] [stderr]    Compiling fontdb v0.3.0
[INFO] [stderr]    Compiling usvg v0.12.0
[INFO] [stderr]    Compiling resvg v0.12.0
[INFO] [stderr]    Compiling sgf-render v1.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(str_split_once)]
[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 `sgf-render`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "a1d8cfea8467cadcc2365353dd823abe615586e4e8a92cc942191fe7ff0b94f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1d8cfea8467cadcc2365353dd823abe615586e4e8a92cc942191fe7ff0b94f1", kill_on_drop: false }`
[INFO] [stdout] a1d8cfea8467cadcc2365353dd823abe615586e4e8a92cc942191fe7ff0b94f1