[INFO] cloning repository https://github.com/katharostech/amethyst-ecs-benchmarks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/katharostech/amethyst-ecs-benchmarks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkatharostech%2Famethyst-ecs-benchmarks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkatharostech%2Famethyst-ecs-benchmarks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8c718d53eb8e39c1c19254b64742331ed4e033ca
[INFO] documenting katharostech/amethyst-ecs-benchmarks against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkatharostech%2Famethyst-ecs-benchmarks" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/katharostech/amethyst-ecs-benchmarks on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/katharostech/amethyst-ecs-benchmarks
[INFO] finished tweaking git repo https://github.com/katharostech/amethyst-ecs-benchmarks
[INFO] tweaked toml for git repo https://github.com/katharostech/amethyst-ecs-benchmarks written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/katharostech/amethyst-ecs-benchmarks already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c95ed3e2c112989ca52af52a32f98469d3a3ba69c1c3bda8eade2df3a2fc4d3
[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" "2c95ed3e2c112989ca52af52a32f98469d3a3ba69c1c3bda8eade2df3a2fc4d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c95ed3e2c112989ca52af52a32f98469d3a3ba69c1c3bda8eade2df3a2fc4d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c95ed3e2c112989ca52af52a32f98469d3a3ba69c1c3bda8eade2df3a2fc4d3", kill_on_drop: false }`
[INFO] [stdout] 2c95ed3e2c112989ca52af52a32f98469d3a3ba69c1c3bda8eade2df3a2fc4d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "RUSTDOCFLAGS=--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f472a2bb704fa3a6500f319157915f9299274d2c19a728b1d608d0091ca30c0
[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" "5f472a2bb704fa3a6500f319157915f9299274d2c19a728b1d608d0091ca30c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling regex-syntax v0.6.11
[INFO] [stderr]     Checking atom v0.3.5
[INFO] [stderr]    Compiling nonzero_signed v1.0.3
[INFO] [stderr]     Checking mopa v0.2.2
[INFO] [stderr]     Checking hashbrown v0.5.0
[INFO] [stderr]     Checking shrev v1.1.1
[INFO] [stderr]    Compiling names v0.11.0
[INFO] [stderr]     Checking tuple_utils v0.3.0
[INFO] [stderr]     Checking cast v0.2.2
[INFO] [stderr]     Checking mint v0.5.1
[INFO] [stderr]    Compiling edit-distance v2.1.0
[INFO] [stderr]     Checking downcast-rs v1.0.4
[INFO] [stderr]     Checking easy_ffi v0.1.0
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking matrixmultiply v0.2.2
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking backtrace-sys v0.1.31
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking backtrace v0.3.34
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking amethyst_error v0.2.0 (https://github.com/amethyst/amethyst#af3bf68a)
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]     Checking chrono v0.4.7
[INFO] [stderr]    Compiling regex v1.2.1
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]     Checking hibitset v0.6.2
[INFO] [stderr]    Compiling quickcheck v0.8.5
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]    Compiling shred-derive v0.6.1
[INFO] [stderr]    Compiling derivative v1.0.2
[INFO] [stderr]    Compiling alga_derive v0.9.1
[INFO] [stderr]    Compiling getset v0.0.7
[INFO] [stderr]    Compiling derive-new v0.5.7
[INFO] [stderr]     Checking shred v0.9.2
[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/shred-0.9.2/src/lib.rs:54:34
[INFO] [stdout]    |
[INFO] [stdout] 54 | #![cfg_attr(feature = "nightly", feature(core_intrinsics))]
[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 `shred`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5f472a2bb704fa3a6500f319157915f9299274d2c19a728b1d608d0091ca30c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f472a2bb704fa3a6500f319157915f9299274d2c19a728b1d608d0091ca30c0", kill_on_drop: false }`
[INFO] [stdout] 5f472a2bb704fa3a6500f319157915f9299274d2c19a728b1d608d0091ca30c0