[INFO] fetching crate surge-modulation 0.2.0-alpha.0...
[INFO] testing surge-modulation-0.2.0-alpha.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate surge-modulation 0.2.0-alpha.0 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate surge-modulation 0.2.0-alpha.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 surge-modulation 0.2.0-alpha.0
[INFO] finished tweaking crates.io crate surge-modulation 0.2.0-alpha.0
[INFO] tweaked toml for crates.io crate surge-modulation 0.2.0-alpha.0 written to /workspace/builds/worker-56/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] 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-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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] bfc594dc646437bdb3bf4e90f21e200bf1400364d2880c1c0bb3104de8e46da0
[INFO] running `Command { std: "docker" "start" "-a" "bfc594dc646437bdb3bf4e90f21e200bf1400364d2880c1c0bb3104de8e46da0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfc594dc646437bdb3bf4e90f21e200bf1400364d2880c1c0bb3104de8e46da0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfc594dc646437bdb3bf4e90f21e200bf1400364d2880c1c0bb3104de8e46da0", kill_on_drop: false }`
[INFO] [stdout] bfc594dc646437bdb3bf4e90f21e200bf1400364d2880c1c0bb3104de8e46da0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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] 2c60f3a9fc60f0ccc082731564c238e0f365e0b6d996d8e7f44331a1aeb211bc
[INFO] running `Command { std: "docker" "start" "-a" "2c60f3a9fc60f0ccc082731564c238e0f365e0b6d996d8e7f44331a1aeb211bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling paste v1.0.6
[INFO] [stderr]    Compiling atomic_float v0.1.0
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling surge-constants v0.2.0-alpha.0
[INFO] [stderr]    Compiling approx_eq v0.1.8
[INFO] [stderr]    Compiling half v1.8.2
[INFO] [stderr]    Compiling byteorder v0.5.3
[INFO] [stderr]    Compiling float-ord v0.3.2
[INFO] [stderr]    Compiling once_cell v1.9.0
[INFO] [stderr]    Compiling surge-macros v0.2.0-alpha.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling protobuf v2.27.1
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling prometheus v0.13.0
[INFO] [stderr]    Compiling surge-quadrosc v0.2.0-alpha.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling lock_api v0.4.6
[INFO] [stderr]    Compiling matrixmultiply v0.3.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling enhanced_enum v0.2.2
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling getrandom v0.2.5
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling approx v0.5.1
[INFO] [stderr]    Compiling ndarray v0.15.4
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling getset v0.1.2
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling enum_dispatch v0.3.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling surge-samplerate v0.2.0-alpha.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/surge-samplerate-0.2.0-alpha.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(in_band_lifetimes)]
[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 `surge-samplerate` 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" "2c60f3a9fc60f0ccc082731564c238e0f365e0b6d996d8e7f44331a1aeb211bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c60f3a9fc60f0ccc082731564c238e0f365e0b6d996d8e7f44331a1aeb211bc", kill_on_drop: false }`
[INFO] [stdout] 2c60f3a9fc60f0ccc082731564c238e0f365e0b6d996d8e7f44331a1aeb211bc