[INFO] cloning repository https://github.com/TrinaglesDrawers/bird_hordes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TrinaglesDrawers/bird_hordes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrinaglesDrawers%2Fbird_hordes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrinaglesDrawers%2Fbird_hordes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8f411529db12524c70c5015f20ec18eb2d464272
[INFO] testing TrinaglesDrawers/bird_hordes against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrinaglesDrawers%2Fbird_hordes" "/workspace/builds/worker-70/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-70/source'...
[INFO] [stderr] done.
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[INFO] validating manifest of git repo https://github.com/TrinaglesDrawers/bird_hordes on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TrinaglesDrawers/bird_hordes
[INFO] finished tweaking git repo https://github.com/TrinaglesDrawers/bird_hordes
[INFO] tweaked toml for git repo https://github.com/TrinaglesDrawers/bird_hordes written to /workspace/builds/worker-70/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/zakarumych/arcana.git`
[INFO] [stderr]     Updating git repository `https://github.com/phip1611/soundio-rs`
[INFO] [stderr]     Updating git repository `https://github.com/zakarumych/sierra`
[INFO] [stderr]     Updating git repository `https://github.com/zakarumych/skelly.git`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1731ba82697fbc03f7b364bbde5a6b1d7dc667db2a23add3a33a7b672e4c193d
[INFO] running `Command { std: "docker" "start" "-a" "1731ba82697fbc03f7b364bbde5a6b1d7dc667db2a23add3a33a7b672e4c193d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1731ba82697fbc03f7b364bbde5a6b1d7dc667db2a23add3a33a7b672e4c193d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1731ba82697fbc03f7b364bbde5a6b1d7dc667db2a23add3a33a7b672e4c193d", kill_on_drop: false }`
[INFO] [stdout] 1731ba82697fbc03f7b364bbde5a6b1d7dc667db2a23add3a33a7b672e4c193d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] db9d27248f46086ffcc75010a6334a8519cd374fba5742922999f5d42e6e3957
[INFO] running `Command { std: "docker" "start" "-a" "db9d27248f46086ffcc75010a6334a8519cd374fba5742922999f5d42e6e3957", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.76
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[INFO] [stderr]    Compiling serde_derive v1.0.130
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[INFO] [stderr]    Compiling version_check v0.9.3
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[INFO] [stderr]    Compiling once_cell v1.8.0
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[INFO] [stderr]    Compiling tiny-keccak v2.0.2
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[INFO] [stderr]    Compiling rustversion v1.0.5
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling rkyv v0.6.7
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[INFO] [stderr]    Compiling rustc-hash v1.1.0
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[INFO] [stderr]    Compiling fallible-iterator v0.2.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling downcast-rs v1.2.0
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]    Compiling crossbeam-queue v0.3.2
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[INFO] [stderr]    Compiling futures-sink v0.3.17
[INFO] [stderr]    Compiling bytemuck v1.7.2
[INFO] [stderr]    Compiling wasmer-compiler-cranelift v2.0.0
[INFO] [stderr]    Compiling leb128 v0.2.4
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-channel v0.3.17
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[INFO] [stderr]    Compiling minimal-lexical v0.1.3
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[INFO] [stderr]    Compiling eyre v0.6.5
[INFO] [stderr]    Compiling indenter v0.3.3
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling futures-io v0.3.17
[INFO] [stderr]    Compiling ab_glyph_rasterizer v0.1.4
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling ahash v0.4.7
[INFO] [stderr]    Compiling xdg v2.2.0
[INFO] [stderr]    Compiling winit v0.25.0
[INFO] [stderr]    Compiling owo-colors v1.3.0
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling arrayvec v0.7.1
[INFO] [stderr]    Compiling layered-bitset v0.1.3
[INFO] [stderr]    Compiling scoped-arena v0.3.0
[INFO] [stderr]    Compiling hound v3.4.0
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling libloading v0.7.0
[INFO] [stderr]    Compiling tracing-core v0.1.19
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling wayland-sys v0.28.6
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling sharded-slab v0.1.3
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]    Compiling libloading v0.6.7
[INFO] [stderr]    Compiling codespan-reporting v0.11.1
[INFO] [stderr]    Compiling tinyvec v1.3.1
[INFO] [stderr]    Compiling deflate v0.9.1
[INFO] [stderr]    Compiling approx v0.5.0
[INFO] [stderr]    Compiling gpu-descriptor-types v0.1.1
[INFO] [stderr]    Compiling gpu-alloc-types v0.2.0
[INFO] [stderr]    Compiling spirv v0.2.0+1.5.4
[INFO] [stderr]    Compiling matrixmultiply v0.3.1
[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/scoped-arena-0.3.0/src/lib.rs:124:40
[INFO] [stdout]     |
[INFO] [stdout] 124 | #![cfg_attr(feature = "allocator_api", feature(allocator_api))]
[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 `scoped-arena` 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" "db9d27248f46086ffcc75010a6334a8519cd374fba5742922999f5d42e6e3957", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db9d27248f46086ffcc75010a6334a8519cd374fba5742922999f5d42e6e3957", kill_on_drop: false }`
[INFO] [stdout] db9d27248f46086ffcc75010a6334a8519cd374fba5742922999f5d42e6e3957