[INFO] fetching crate rftrace-frontend 0.1.0...
[INFO] testing rftrace-frontend-0.1.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate rftrace-frontend 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate rftrace-frontend 0.1.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rftrace-frontend 0.1.0
[INFO] finished tweaking crates.io crate rftrace-frontend 0.1.0
[INFO] tweaked toml for crates.io crate rftrace-frontend 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded byteorder v1.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 963c27f5b1d8f8b4d3686483d7fb09f0bca553320322d30a57506171a56c1ef2
[INFO] running `Command { std: "docker" "start" "-a" "963c27f5b1d8f8b4d3686483d7fb09f0bca553320322d30a57506171a56c1ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "963c27f5b1d8f8b4d3686483d7fb09f0bca553320322d30a57506171a56c1ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "963c27f5b1d8f8b4d3686483d7fb09f0bca553320322d30a57506171a56c1ef2", kill_on_drop: false }`
[INFO] [stdout] 963c27f5b1d8f8b4d3686483d7fb09f0bca553320322d30a57506171a56c1ef2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88bb7cd2f6b910fa107615e3e1879551a1a5c34cc576de51669bc09dd08e705c
[INFO] running `Command { std: "docker" "start" "-a" "88bb7cd2f6b910fa107615e3e1879551a1a5c34cc576de51669bc09dd08e705c", kill_on_drop: false }`
[INFO] [stderr]    Compiling rftrace-frontend v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(vec_into_raw_parts)]
[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 `rftrace-frontend` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "88bb7cd2f6b910fa107615e3e1879551a1a5c34cc576de51669bc09dd08e705c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88bb7cd2f6b910fa107615e3e1879551a1a5c34cc576de51669bc09dd08e705c", kill_on_drop: false }`
[INFO] [stdout] 88bb7cd2f6b910fa107615e3e1879551a1a5c34cc576de51669bc09dd08e705c