[INFO] fetching crate guff-matrix 0.1.12...
[INFO] checking guff-matrix-0.1.12 against 1.55.0 for beta-1.56-3
[INFO] extracting crate guff-matrix 0.1.12 into /workspace/builds/worker-37/source
[INFO] validating manifest of crates.io crate guff-matrix 0.1.12 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 crates.io crate guff-matrix 0.1.12
[INFO] finished tweaking crates.io crate guff-matrix 0.1.12
[INFO] tweaked toml for crates.io crate guff-matrix 0.1.12 written to /workspace/builds/worker-37/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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] 3d3ae84b1fed9fdcf7b7a222538edefbb11ae2d1cd34cb4bef05b1b3857e27ab
[INFO] running `Command { std: "docker" "start" "-a" "3d3ae84b1fed9fdcf7b7a222538edefbb11ae2d1cd34cb4bef05b1b3857e27ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d3ae84b1fed9fdcf7b7a222538edefbb11ae2d1cd34cb4bef05b1b3857e27ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d3ae84b1fed9fdcf7b7a222538edefbb11ae2d1cd34cb4bef05b1b3857e27ab", kill_on_drop: false }`
[INFO] [stdout] 3d3ae84b1fed9fdcf7b7a222538edefbb11ae2d1cd34cb4bef05b1b3857e27ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc41682a098f0269fd32605ae95cb5e5b380a7420b980adebc5f203ec46dd02f
[INFO] running `Command { std: "docker" "start" "-a" "fc41682a098f0269fd32605ae95cb5e5b380a7420b980adebc5f203ec46dd02f", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking half v1.8.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-bigint v0.4.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking serde_json v1.0.68
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking guff v0.1.7
[INFO] [stderr]     Checking guff-matrix v0.1.12 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:53:1
[INFO] [stdout]    |
[INFO] [stdout] 53 | #![feature(stdsimd)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::x86::*`
[INFO] [stdout]   --> src/lib.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 84 |     use crate::x86::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `guff-matrix` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "fc41682a098f0269fd32605ae95cb5e5b380a7420b980adebc5f203ec46dd02f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc41682a098f0269fd32605ae95cb5e5b380a7420b980adebc5f203ec46dd02f", kill_on_drop: false }`
[INFO] [stdout] fc41682a098f0269fd32605ae95cb5e5b380a7420b980adebc5f203ec46dd02f
