[INFO] fetching crate libos 0.1.2...
[INFO] checking libos-0.1.2 against beta for pr-78714
[INFO] extracting crate libos 0.1.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate libos 0.1.2 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 crates.io crate libos 0.1.2
[INFO] finished tweaking crates.io crate libos 0.1.2
[INFO] tweaked toml for crates.io crate libos 0.1.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 6e7bf6aa32261aba68fbe8183660e47a2a2957a5ea2196e17f7ba6d6b0006b82
[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" "6e7bf6aa32261aba68fbe8183660e47a2a2957a5ea2196e17f7ba6d6b0006b82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e7bf6aa32261aba68fbe8183660e47a2a2957a5ea2196e17f7ba6d6b0006b82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e7bf6aa32261aba68fbe8183660e47a2a2957a5ea2196e17f7ba6d6b0006b82", kill_on_drop: false }`
[INFO] [stdout] 6e7bf6aa32261aba68fbe8183660e47a2a2957a5ea2196e17f7ba6d6b0006b82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 1d06b6013dffa3b41217174c112fae4afbbbedec18ac412e54db7803be659d3d
[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" "1d06b6013dffa3b41217174c112fae4afbbbedec18ac412e54db7803be659d3d", kill_on_drop: false }`
[INFO] [stderr]    Compiling llvm-tools v0.1.1
[INFO] [stderr]     Checking zero v0.1.2
[INFO] [stderr]     Checking ux v0.1.3
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking fixedvec v0.2.4
[INFO] [stderr]     Checking usize_conversions v0.2.0
[INFO] [stderr]     Checking array-init v0.0.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling cast v0.2.3
[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/usize_conversions-0.2.0/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(i128_type)]
[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 `usize_conversions`
[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" "1d06b6013dffa3b41217174c112fae4afbbbedec18ac412e54db7803be659d3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d06b6013dffa3b41217174c112fae4afbbbedec18ac412e54db7803be659d3d", kill_on_drop: false }`
[INFO] [stdout] 1d06b6013dffa3b41217174c112fae4afbbbedec18ac412e54db7803be659d3d