[INFO] fetching crate image-decompose 0.4.1...
[INFO] testing image-decompose-0.4.1 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate image-decompose 0.4.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate image-decompose 0.4.1 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate image-decompose 0.4.1
[INFO] finished tweaking crates.io crate image-decompose 0.4.1
[INFO] tweaked toml for crates.io crate image-decompose 0.4.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate image-decompose 0.4.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.92
[INFO] [stderr]   Downloaded webp v0.1.1
[INFO] [stderr]   Downloaded srgb v0.1.4
[INFO] [stderr]   Downloaded rgb_derivation v0.2.0
[INFO] [stderr]   Downloaded srgb v0.2.0
[INFO] [stderr]   Downloaded lab v0.9.0
[INFO] [stderr]   Downloaded luv v0.9.0
[INFO] [stderr]   Downloaded rgb_derivation v0.1.2
[INFO] [stderr]   Downloaded libwebp-sys v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7c76d80666e77b3d3f4886c2c8962ce42876f7faaf8e18fa0b658313743f3f0
[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" "e7c76d80666e77b3d3f4886c2c8962ce42876f7faaf8e18fa0b658313743f3f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7c76d80666e77b3d3f4886c2c8962ce42876f7faaf8e18fa0b658313743f3f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7c76d80666e77b3d3f4886c2c8962ce42876f7faaf8e18fa0b658313743f3f0", kill_on_drop: false }`
[INFO] [stdout] e7c76d80666e77b3d3f4886c2c8962ce42876f7faaf8e18fa0b658313743f3f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 043c4f7d5a47efd92d919ad78609387598a18a934934ffdd315fb73b2f2f579d
[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" "043c4f7d5a47efd92d919ad78609387598a18a934934ffdd315fb73b2f2f579d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling weezl v0.1.4
[INFO] [stderr]    Compiling bytemuck v1.5.1
[INFO] [stderr]    Compiling lab v0.9.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rgb_derivation v0.1.2
[INFO] [stderr]    Compiling rgb_derivation v0.2.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling gif v0.11.2
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling srgb v0.1.4
[INFO] [stderr]    Compiling srgb v0.2.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling libwebp-sys v0.2.0
[INFO] [stderr]    Compiling luv v0.9.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.22
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tiff v0.6.1
[INFO] [stderr]    Compiling image v0.23.14
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]    Compiling clap v3.0.0-beta.2
[INFO] [stderr]    Compiling webp v0.1.1
[INFO] [stderr]    Compiling image-decompose v0.4.1 (/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(
[INFO] [stdout] 2 | |     maybe_uninit_write_slice,
[INFO] [stdout] 3 | |     process_exitcode_placeholder,
[INFO] [stdout] 4 | |     result_into_ok_or_err,
[INFO] [stdout] ... |
[INFO] [stdout] 7 | |     vec_into_raw_parts
[INFO] [stdout] 8 | | )]
[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 `image-decompose` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "043c4f7d5a47efd92d919ad78609387598a18a934934ffdd315fb73b2f2f579d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "043c4f7d5a47efd92d919ad78609387598a18a934934ffdd315fb73b2f2f579d", kill_on_drop: false }`
[INFO] [stdout] 043c4f7d5a47efd92d919ad78609387598a18a934934ffdd315fb73b2f2f579d
