[INFO] cloning repository https://github.com/richmans/webos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/richmans/webos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichmans%2Fwebos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichmans%2Fwebos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9e08c7e5e26530e2902753fc01e9102552cd74d0
[INFO] checking richmans/webos against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichmans%2Fwebos" "/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/richmans/webos on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] started tweaking git repo https://github.com/richmans/webos
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/richmans/webos
[INFO] tweaked toml for git repo https://github.com/richmans/webos written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/richmans/webos 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] 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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4724596d3143fb0513e338a3d59a56c3e6b220dc7e5623b1185026d2d179097e
[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" "4724596d3143fb0513e338a3d59a56c3e6b220dc7e5623b1185026d2d179097e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4724596d3143fb0513e338a3d59a56c3e6b220dc7e5623b1185026d2d179097e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4724596d3143fb0513e338a3d59a56c3e6b220dc7e5623b1185026d2d179097e", kill_on_drop: false }`
[INFO] [stdout] 4724596d3143fb0513e338a3d59a56c3e6b220dc7e5623b1185026d2d179097e
[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" "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] 71d77f6321fcf2f37149b6b28ea00c792c3c0c4e8057a1051819f00ca86a2e29
[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" "71d77f6321fcf2f37149b6b28ea00c792c3c0c4e8057a1051819f00ca86a2e29", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling x86_64 v0.11.0
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]    Compiling bootloader v0.9.4
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking cpuio v0.3.0
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking conquer-util v0.2.0
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]     Checking pc-keyboard v0.5.0
[INFO] [stderr]     Checking volatile v0.2.6
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[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/cpuio-0.3.0/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(llvm_asm, const_fn)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling hashbrown v0.8.0
[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 `cpuio`
[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" "71d77f6321fcf2f37149b6b28ea00c792c3c0c4e8057a1051819f00ca86a2e29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71d77f6321fcf2f37149b6b28ea00c792c3c0c4e8057a1051819f00ca86a2e29", kill_on_drop: false }`
[INFO] [stdout] 71d77f6321fcf2f37149b6b28ea00c792c3c0c4e8057a1051819f00ca86a2e29