[INFO] fetching crate atopology 0.0.23...
[INFO] testing atopology-0.0.23 against 1.55.0 for beta-1.56-1
[INFO] extracting crate atopology 0.0.23 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate atopology 0.0.23 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 atopology 0.0.23
[INFO] finished tweaking crates.io crate atopology 0.0.23
[INFO] tweaked toml for crates.io crate atopology 0.0.23 written to /workspace/builds/worker-4/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] 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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 73ab5af05ee2326da6289a7d6c012a5a5928f652582d6c381baf5513beab9b30
[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" "73ab5af05ee2326da6289a7d6c012a5a5928f652582d6c381baf5513beab9b30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73ab5af05ee2326da6289a7d6c012a5a5928f652582d6c381baf5513beab9b30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73ab5af05ee2326da6289a7d6c012a5a5928f652582d6c381baf5513beab9b30", kill_on_drop: false }`
[INFO] [stdout] 73ab5af05ee2326da6289a7d6c012a5a5928f652582d6c381baf5513beab9b30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] bae4a0617b65f002867989f50a7f0afecd87ff4b18e949921165209ae9f0a025
[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" "bae4a0617b65f002867989f50a7f0afecd87ff4b18e949921165209ae9f0a025", kill_on_drop: false }`
[INFO] [stderr]    Compiling x86 v0.41.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling cty v0.2.1
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling raw-cpuid v10.2.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling flate2 v1.0.21
[INFO] [stderr]    Compiling cstr_core v0.2.4
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling procfs v0.9.1
[INFO] [stderr]    Compiling regex v1.5.4
[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/x86-0.41.0/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(llvm_asm, 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 `x86` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bae4a0617b65f002867989f50a7f0afecd87ff4b18e949921165209ae9f0a025", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bae4a0617b65f002867989f50a7f0afecd87ff4b18e949921165209ae9f0a025", kill_on_drop: false }`
[INFO] [stdout] bae4a0617b65f002867989f50a7f0afecd87ff4b18e949921165209ae9f0a025