[INFO] fetching crate hamt-rs 0.3.0...
[INFO] checking hamt-rs-0.3.0 against beta for pr-78714
[INFO] extracting crate hamt-rs 0.3.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate hamt-rs 0.3.0 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 hamt-rs 0.3.0
[INFO] finished tweaking crates.io crate hamt-rs 0.3.0
[INFO] tweaked toml for crates.io crate hamt-rs 0.3.0 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] 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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e4234416db10a751cb60618176c9bd02eb93b6862f75642292541c96294b4017
[INFO] running `Command { std: "docker" "start" "-a" "e4234416db10a751cb60618176c9bd02eb93b6862f75642292541c96294b4017", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4234416db10a751cb60618176c9bd02eb93b6862f75642292541c96294b4017", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4234416db10a751cb60618176c9bd02eb93b6862f75642292541c96294b4017", kill_on_drop: false }`
[INFO] [stdout] e4234416db10a751cb60618176c9bd02eb93b6862f75642292541c96294b4017
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c278bae9eb3b87d19c555b9bc2f12281a6ae9b289c1bdc9b9193d3e0e437a581
[INFO] running `Command { std: "docker" "start" "-a" "c278bae9eb3b87d19c555b9bc2f12281a6ae9b289c1bdc9b9193d3e0e437a581", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking hamt-rs v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> benches/benches.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![feature(test)]
[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 `hamt-rs`
[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" "c278bae9eb3b87d19c555b9bc2f12281a6ae9b289c1bdc9b9193d3e0e437a581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c278bae9eb3b87d19c555b9bc2f12281a6ae9b289c1bdc9b9193d3e0e437a581", kill_on_drop: false }`
[INFO] [stdout] c278bae9eb3b87d19c555b9bc2f12281a6ae9b289c1bdc9b9193d3e0e437a581