[INFO] fetching crate zeta 0.1.6...
[INFO] testing zeta-0.1.6 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate zeta 0.1.6 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate zeta 0.1.6 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zeta 0.1.6
[INFO] finished tweaking crates.io crate zeta 0.1.6
[INFO] tweaked toml for crates.io crate zeta 0.1.6 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate zeta 0.1.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded winconsole v0.10.0
[INFO] [stderr]   Downloaded rgb v0.8.14
[INFO] [stderr]   Downloaded colored v1.8.0
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cddd3f2c4489337a00084e8a4843d7b1ed524d90c7998c1ba55a370184f1a6d9
[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" "cddd3f2c4489337a00084e8a4843d7b1ed524d90c7998c1ba55a370184f1a6d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cddd3f2c4489337a00084e8a4843d7b1ed524d90c7998c1ba55a370184f1a6d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cddd3f2c4489337a00084e8a4843d7b1ed524d90c7998c1ba55a370184f1a6d9", kill_on_drop: false }`
[INFO] [stdout] cddd3f2c4489337a00084e8a4843d7b1ed524d90c7998c1ba55a370184f1a6d9
[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=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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2fbe495ad2622d650563c03431ed7c0f59d6c2b0623f3994fa278054f002e80e
[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" "2fbe495ad2622d650563c03431ed7c0f59d6c2b0623f3994fa278054f002e80e", kill_on_drop: false }`
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling winapi v0.3.8
[INFO] [stderr]    Compiling approx v0.1.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rgb v0.8.14
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling winconsole v0.10.0
[INFO] [stderr]    Compiling colored v1.8.0
[INFO] [stderr]    Compiling zeta v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(bind_by_move_pattern_guards)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zeta`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "2fbe495ad2622d650563c03431ed7c0f59d6c2b0623f3994fa278054f002e80e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fbe495ad2622d650563c03431ed7c0f59d6c2b0623f3994fa278054f002e80e", kill_on_drop: false }`
[INFO] [stdout] 2fbe495ad2622d650563c03431ed7c0f59d6c2b0623f3994fa278054f002e80e