[INFO] fetching crate notation_midi 0.5.0...
[INFO] testing notation_midi-0.5.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate notation_midi 0.5.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate notation_midi 0.5.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate notation_midi 0.5.0
[INFO] finished tweaking crates.io crate notation_midi 0.5.0
[INFO] tweaked toml for crates.io crate notation_midi 0.5.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de3b386a543a2d44785f41ea9307c81139fe87609676e3e69b88df86570bf05e
[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" "de3b386a543a2d44785f41ea9307c81139fe87609676e3e69b88df86570bf05e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de3b386a543a2d44785f41ea9307c81139fe87609676e3e69b88df86570bf05e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de3b386a543a2d44785f41ea9307c81139fe87609676e3e69b88df86570bf05e", kill_on_drop: false }`
[INFO] [stdout] de3b386a543a2d44785f41ea9307c81139fe87609676e3e69b88df86570bf05e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de6b6950a4657bb08be6df85330f554bdc3a9e79d579df25de3ee917c5d79c2a
[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" "de6b6950a4657bb08be6df85330f554bdc3a9e79d579df25de3ee917c5d79c2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling erased-serde v0.3.18
[INFO] [stderr]    Compiling fixedbitset v0.4.1
[INFO] [stderr]    Compiling cpal v0.13.5
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling basedrop v0.1.2
[INFO] [stderr]    Compiling memalloc v0.1.0
[INFO] [stderr]    Compiling dmsort v1.0.1
[INFO] [stderr]    Compiling tracing-core v0.1.22
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling core-error v0.0.0
[INFO] [stderr]    Compiling ringbuf v0.2.7
[INFO] [stderr]    Compiling midi-msg v0.3.0
[INFO] [stderr]    Compiling matchers v0.1.0
[INFO] [stderr]    Compiling crossbeam-channel v0.5.2
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling fehler-macros v1.0.0
[INFO] [stderr]    Compiling num_enum_derive v0.5.6
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling fluidlite-sys v0.2.1
[INFO] [stderr]    Compiling bevy_tasks v0.6.0
[INFO] [stderr]    Compiling alsa v0.6.0
[INFO] [stderr]    Compiling tracing v0.1.31
[INFO] [stderr]    Compiling tracing-log v0.1.2
[INFO] [stderr]    Compiling cargo-manifest v0.2.6
[INFO] [stderr]    Compiling num_enum v0.5.6
[INFO] [stderr]    Compiling fluidlite v0.2.1
[INFO] [stderr]    Compiling fehler v1.0.0
[INFO] [stderr]    Compiling bevy_macro_utils v0.6.0
[INFO] [stderr]    Compiling alsa v0.4.3
[INFO] [stderr]    Compiling helgoboss-midi v0.2.0
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling glam v0.20.2
[INFO] [stderr]    Compiling ron v0.7.0
[INFO] [stderr]    Compiling notation_core v0.5.0
[INFO] [stderr]    Compiling serde_arrays v0.1.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling tracing-subscriber v0.3.9
[INFO] [stderr]    Compiling bevy_derive v0.6.0
[INFO] [stderr]    Compiling bevy_reflect_derive v0.6.0
[INFO] [stderr]    Compiling bevy_ecs_macros v0.6.0
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling midir v0.7.0
[INFO] [stderr]    Compiling notation_fretted v0.5.0
[INFO] [stderr]    Compiling kira v0.5.3
[INFO] [stderr]    Compiling notation_guitar v0.5.0
[INFO] [stderr]    Compiling notation_proto v0.5.0
[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/notation_proto-0.5.0/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(arc_new_cyclic)]
[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 `notation_proto` 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" "de6b6950a4657bb08be6df85330f554bdc3a9e79d579df25de3ee917c5d79c2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de6b6950a4657bb08be6df85330f554bdc3a9e79d579df25de3ee917c5d79c2a", kill_on_drop: false }`
[INFO] [stdout] de6b6950a4657bb08be6df85330f554bdc3a9e79d579df25de3ee917c5d79c2a