[INFO] fetching crate libos 0.1.2...
[INFO] testing libos-0.1.2 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate libos 0.1.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate libos 0.1.2 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "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-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fixedvec v0.2.4
[INFO] [stderr]   Downloaded array-init v0.0.4
[INFO] [stderr]   Downloaded x86_64 v0.7.7
[INFO] [stderr]   Downloaded llvm-tools v0.1.1
[INFO] [stderr]   Downloaded xmas-elf v0.6.2
[INFO] [stderr]   Downloaded ux v0.1.3
[INFO] [stderr]   Downloaded usize_conversions v0.2.0
[INFO] [stderr]   Downloaded bootloader v0.6.4
[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" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4dd7a260e601060f59616443a80867933b969eb3be6676440e79ec003c409cc6
[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" "4dd7a260e601060f59616443a80867933b969eb3be6676440e79ec003c409cc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dd7a260e601060f59616443a80867933b969eb3be6676440e79ec003c409cc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dd7a260e601060f59616443a80867933b969eb3be6676440e79ec003c409cc6", kill_on_drop: false }`
[INFO] [stdout] 4dd7a260e601060f59616443a80867933b969eb3be6676440e79ec003c409cc6
[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=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" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4130b907f30313baf67d0d65252b8e4857dac2e0608251c587a846a0a21986f
[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" "e4130b907f30313baf67d0d65252b8e4857dac2e0608251c587a846a0a21986f", kill_on_drop: false }`
[INFO] [stderr]    Compiling llvm-tools v0.1.1
[INFO] [stderr]    Compiling ux v0.1.3
[INFO] [stderr]    Compiling usize_conversions v0.2.0
[INFO] [stderr]    Compiling fixedvec v0.2.4
[INFO] [stderr]    Compiling array-init v0.0.4
[INFO] [stderr]    Compiling xmas-elf v0.6.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[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/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" "e4130b907f30313baf67d0d65252b8e4857dac2e0608251c587a846a0a21986f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4130b907f30313baf67d0d65252b8e4857dac2e0608251c587a846a0a21986f", kill_on_drop: false }`
[INFO] [stdout] e4130b907f30313baf67d0d65252b8e4857dac2e0608251c587a846a0a21986f
