[INFO] cloning repository https://github.com/quininer/fast-swapview
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/quininer/fast-swapview" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquininer%2Ffast-swapview", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquininer%2Ffast-swapview'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a0110fb2b96301cd9cbc21ac8bd6cd75222c81c1
[INFO] checking quininer/fast-swapview against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquininer%2Ffast-swapview" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quininer/fast-swapview on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/quininer/fast-swapview
[INFO] finished tweaking git repo https://github.com/quininer/fast-swapview
[INFO] tweaked toml for git repo https://github.com/quininer/fast-swapview written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/quininer/fast-swapview already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ac400c55ff84b83b1b9b51d0c83b09faff1121584811be3807832713b70684a
[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" "4ac400c55ff84b83b1b9b51d0c83b09faff1121584811be3807832713b70684a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ac400c55ff84b83b1b9b51d0c83b09faff1121584811be3807832713b70684a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ac400c55ff84b83b1b9b51d0c83b09faff1121584811be3807832713b70684a", kill_on_drop: false }`
[INFO] [stdout] 4ac400c55ff84b83b1b9b51d0c83b09faff1121584811be3807832713b70684a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 359f293fe672ad265ada1d1891a45d978f37c3747fe72e35cc4b4104734a8a3f
[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" "359f293fe672ad265ada1d1891a45d978f37c3747fe72e35cc4b4104734a8a3f", kill_on_drop: false }`
[INFO] [stderr]     Checking fast-floats v0.1.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.5 (https://github.com/crossbeam-rs/crossbeam#9898f927)
[INFO] [stderr]     Checking walkdir v2.2.8
[INFO] [stderr]     Checking regex-automata v0.1.7
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking memchr v2.2.1
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking rayon-core v1.5.0
[INFO] [stderr]     Checking rand_pcg v0.2.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fast-floats-0.1.1/src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![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 `fast-floats`
[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" "359f293fe672ad265ada1d1891a45d978f37c3747fe72e35cc4b4104734a8a3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "359f293fe672ad265ada1d1891a45d978f37c3747fe72e35cc4b4104734a8a3f", kill_on_drop: false }`
[INFO] [stdout] 359f293fe672ad265ada1d1891a45d978f37c3747fe72e35cc4b4104734a8a3f