[INFO] fetching crate pyrus-nn 0.2.1...
[INFO] checking pyrus-nn-0.2.1 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate pyrus-nn 0.2.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate pyrus-nn 0.2.1 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pyrus-nn 0.2.1
[INFO] finished tweaking crates.io crate pyrus-nn 0.2.1
[INFO] tweaked toml for crates.io crate pyrus-nn 0.2.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spin v0.4.10
[INFO] [stderr]   Downloaded pyo3cls v0.5.4
[INFO] [stderr]   Downloaded pyo3-derive-backend v0.5.4
[INFO] [stderr]   Downloaded ndarray-rand v0.9.0
[INFO] [stderr]   Downloaded ndarray-parallel v0.9.1
[INFO] [stderr]   Downloaded mashup v0.1.13+deprecated
[INFO] [stderr]   Downloaded pyo3 v0.5.4
[INFO] [stderr]   Downloaded mashup-impl v0.1.13+deprecated
[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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b7716f6e6b5ed9969d4291f9ca395c3cf3f68bcbe400bff1a78f81d0dda99fc
[INFO] running `Command { std: "docker" "start" "-a" "2b7716f6e6b5ed9969d4291f9ca395c3cf3f68bcbe400bff1a78f81d0dda99fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b7716f6e6b5ed9969d4291f9ca395c3cf3f68bcbe400bff1a78f81d0dda99fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b7716f6e6b5ed9969d4291f9ca395c3cf3f68bcbe400bff1a78f81d0dda99fc", kill_on_drop: false }`
[INFO] [stdout] 2b7716f6e6b5ed9969d4291f9ca395c3cf3f68bcbe400bff1a78f81d0dda99fc
[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=forbid" "-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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dfc4bc410c3a412f2d73b93c7cfb0750a882725738224afdf0f1968322b0451e
[INFO] running `Command { std: "docker" "start" "-a" "dfc4bc410c3a412f2d73b93c7cfb0750a882725738224afdf0f1968322b0451e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.4.3
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]    Compiling ndarray v0.12.1
[INFO] [stderr]    Compiling erased-serde v0.3.16
[INFO] [stderr]    Compiling inventory v0.1.10
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking spin v0.4.10
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.10/src/lib.rs:6:43
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "const_fn", feature(const_fn))]
[INFO] [stdout]   |                                           ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `spin` 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" "dfc4bc410c3a412f2d73b93c7cfb0750a882725738224afdf0f1968322b0451e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfc4bc410c3a412f2d73b93c7cfb0750a882725738224afdf0f1968322b0451e", kill_on_drop: false }`
[INFO] [stdout] dfc4bc410c3a412f2d73b93c7cfb0750a882725738224afdf0f1968322b0451e