[INFO] fetching crate prop-check-rs 0.0.7...
[INFO] testing prop-check-rs-0.0.7 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate prop-check-rs 0.0.7 into /workspace/builds/worker-76/source
[INFO] validating manifest of crates.io crate prop-check-rs 0.0.7 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] removed /workspace/builds/worker-76/source/rust-toolchain
[INFO] started tweaking crates.io crate prop-check-rs 0.0.7
[INFO] finished tweaking crates.io crate prop-check-rs 0.0.7
[INFO] tweaked toml for crates.io crate prop-check-rs 0.0.7 written to /workspace/builds/worker-76/source/Cargo.toml
[INFO] crate crates.io crate prop-check-rs 0.0.7 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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] 05007ef8a959a2e0fc4170ff485ebefd46ac2ef9770434f5cb011647d3efc450
[INFO] running `Command { std: "docker" "start" "-a" "05007ef8a959a2e0fc4170ff485ebefd46ac2ef9770434f5cb011647d3efc450", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05007ef8a959a2e0fc4170ff485ebefd46ac2ef9770434f5cb011647d3efc450", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05007ef8a959a2e0fc4170ff485ebefd46ac2ef9770434f5cb011647d3efc450", kill_on_drop: false }`
[INFO] [stdout] 05007ef8a959a2e0fc4170ff485ebefd46ac2ef9770434f5cb011647d3efc450
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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] 57f08933bc8d020c7354fa5e27f2da8c60c2c4e120099b3a08f0edd5b0e3e77a
[INFO] running `Command { std: "docker" "start" "-a" "57f08933bc8d020c7354fa5e27f2da8c60c2c4e120099b3a08f0edd5b0e3e77a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling anyhow v1.0.43
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling iso-4217 v0.1.0
[INFO] [stderr]    Compiling rust-fp-categories v0.0.5
[INFO] [stderr]    Compiling once_cell v1.8.0
[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/rust-fp-categories-0.0.5/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_associated_types)]
[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 `rust-fp-categories` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "57f08933bc8d020c7354fa5e27f2da8c60c2c4e120099b3a08f0edd5b0e3e77a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57f08933bc8d020c7354fa5e27f2da8c60c2c4e120099b3a08f0edd5b0e3e77a", kill_on_drop: false }`
[INFO] [stdout] 57f08933bc8d020c7354fa5e27f2da8c60c2c4e120099b3a08f0edd5b0e3e77a