[INFO] fetching crate unix-fifo-async 0.0.3...
[INFO] testing unix-fifo-async-0.0.3 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate unix-fifo-async 0.0.3 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate unix-fifo-async 0.0.3 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unix-fifo-async 0.0.3
[INFO] finished tweaking crates.io crate unix-fifo-async 0.0.3
[INFO] tweaked toml for crates.io crate unix-fifo-async 0.0.3 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate unix-fifo-async 0.0.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f939d4469cdd4838e85a49686f463f56ad97eef951686b0604d9fbb340ef69c
[INFO] running `Command { std: "docker" "start" "-a" "4f939d4469cdd4838e85a49686f463f56ad97eef951686b0604d9fbb340ef69c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f939d4469cdd4838e85a49686f463f56ad97eef951686b0604d9fbb340ef69c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f939d4469cdd4838e85a49686f463f56ad97eef951686b0604d9fbb340ef69c", kill_on_drop: false }`
[INFO] [stdout] 4f939d4469cdd4838e85a49686f463f56ad97eef951686b0604d9fbb340ef69c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa0bdee4ba2e309cc61ef2929ea80d16199e8c67e4210cac70e426f6ef13b560
[INFO] running `Command { std: "docker" "start" "-a" "aa0bdee4ba2e309cc61ef2929ea80d16199e8c67e4210cac70e426f6ef13b560", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling async-task v1.0.0
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling futures-timer v0.3.0
[INFO] [stderr]    Compiling async-std v0.99.3
[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/async-std-0.99.3/src/lib.rs:30:1
[INFO] [stdout]    |
[INFO] [stdout] 30 | #![feature(async_await)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `async_await` has been stable since 1.39.0 and no longer requires an attribute to enable
[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 `async-std` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "aa0bdee4ba2e309cc61ef2929ea80d16199e8c67e4210cac70e426f6ef13b560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa0bdee4ba2e309cc61ef2929ea80d16199e8c67e4210cac70e426f6ef13b560", kill_on_drop: false }`
[INFO] [stdout] aa0bdee4ba2e309cc61ef2929ea80d16199e8c67e4210cac70e426f6ef13b560