[INFO] fetching crate peroxide 0.30.9...
[INFO] testing peroxide-0.30.9 against 1.55.0 for beta-1.56-1
[INFO] extracting crate peroxide 0.30.9 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate peroxide 0.30.9 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 peroxide 0.30.9
[INFO] finished tweaking crates.io crate peroxide 0.30.9
[INFO] tweaked toml for crates.io crate peroxide 0.30.9 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate peroxide 0.30.9 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 4b4d41bc98f63111191bc0b2afbf39956d9a2d87216c2da20d552b58ae2e117e
[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" "4b4d41bc98f63111191bc0b2afbf39956d9a2d87216c2da20d552b58ae2e117e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b4d41bc98f63111191bc0b2afbf39956d9a2d87216c2da20d552b58ae2e117e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b4d41bc98f63111191bc0b2afbf39956d9a2d87216c2da20d552b58ae2e117e", kill_on_drop: false }`
[INFO] [stdout] 4b4d41bc98f63111191bc0b2afbf39956d9a2d87216c2da20d552b58ae2e117e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 9a4536c3bd3cdc4bbb3e63423a9f8b9b1d1f46ab9db8a601b33ed4518c7ab929
[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" "9a4536c3bd3cdc4bbb3e63423a9f8b9b1d1f46ab9db8a601b33ed4518c7ab929", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]    Compiling peroxide v0.30.9 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling order-stat v0.1.3
[INFO] [stderr]    Compiling puruspe v0.1.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling thread-tree v0.3.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling matrixmultiply v0.3.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling rand_distr v0.4.0
[INFO] [stderr]    Compiling peroxide-ad v0.3.0
[INFO] [stdout] warning: unused import: `Scalable`
[INFO] [stdout]    --> src/structure/matrix.rs:620:28
[INFO] [stdout]     |
[INFO] [stdout] 620 | use crate::traits::sugar::{Scalable, ScalableMut};
[INFO] [stdout]     |                            ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.66s
[INFO] running `Command { std: "docker" "inspect" "9a4536c3bd3cdc4bbb3e63423a9f8b9b1d1f46ab9db8a601b33ed4518c7ab929", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a4536c3bd3cdc4bbb3e63423a9f8b9b1d1f46ab9db8a601b33ed4518c7ab929", kill_on_drop: false }`
[INFO] [stdout] 9a4536c3bd3cdc4bbb3e63423a9f8b9b1d1f46ab9db8a601b33ed4518c7ab929
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1a0c0ab76e73765b6093fd4dd3f0e106556d7c9cd775980f755767393e0b4b8d
[INFO] running `Command { std: "docker" "start" "-a" "1a0c0ab76e73765b6093fd4dd3f0e106556d7c9cd775980f755767393e0b4b8d", kill_on_drop: false }`
[INFO] [stderr]    Compiling float-cmp v0.8.0
[INFO] [stdout] warning: unused import: `Scalable`
[INFO] [stdout]    --> src/structure/matrix.rs:620:28
[INFO] [stdout]     |
[INFO] [stdout] 620 | use crate::traits::sugar::{Scalable, ScalableMut};
[INFO] [stdout]     |                            ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling peroxide v0.30.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `c` is never read
[INFO] [stdout]  --> examples/chebyshev.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut c = chebyshev_polynomial(0, SpecialKind::First);
[INFO] [stdout]   |             ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `peroxide`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name gl4 --edition=2018 examples/gl4.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' -C metadata=b79217df746317e0 -C extra-filename=-b79217df746317e0 --out-dir /opt/rustwide/target/debug/examples -L dependency=/opt/rustwide/target/debug/deps --extern float_cmp=/opt/rustwide/target/debug/deps/libfloat_cmp-5c2340ca2092be08.rlib --extern matrixmultiply=/opt/rustwide/target/debug/deps/libmatrixmultiply-b89838ba2971d44f.rlib --extern order_stat=/opt/rustwide/target/debug/deps/liborder_stat-6f094b35a0689bf2.rlib --extern peroxide=/opt/rustwide/target/debug/deps/libperoxide-9b33054bcd062c1d.rlib --extern peroxide_ad=/opt/rustwide/target/debug/deps/libperoxide_ad-f7551b2ef174d00f.so --extern puruspe=/opt/rustwide/target/debug/deps/libpuruspe-ea50c3e669db7fdc.rlib --extern rand=/opt/rustwide/target/debug/deps/librand-62abe86a74f10d37.rlib --extern rand_distr=/opt/rustwide/target/debug/deps/librand_distr-d3f9929695bbe68a.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1a0c0ab76e73765b6093fd4dd3f0e106556d7c9cd775980f755767393e0b4b8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a0c0ab76e73765b6093fd4dd3f0e106556d7c9cd775980f755767393e0b4b8d", kill_on_drop: false }`
[INFO] [stdout] 1a0c0ab76e73765b6093fd4dd3f0e106556d7c9cd775980f755767393e0b4b8d