[INFO] fetching crate cloudlog-adifwatch 0.0.9...
[INFO] testing cloudlog-adifwatch-0.0.9 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate cloudlog-adifwatch 0.0.9 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate cloudlog-adifwatch 0.0.9 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cloudlog-adifwatch 0.0.9
[INFO] finished tweaking crates.io crate cloudlog-adifwatch 0.0.9
[INFO] tweaked toml for crates.io crate cloudlog-adifwatch 0.0.9 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate cloudlog-adifwatch 0.0.9 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8cf1661e4614f80a88ce9ac5ec47a533db45bc3ea201536ff258295e437aef8
[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" "d8cf1661e4614f80a88ce9ac5ec47a533db45bc3ea201536ff258295e437aef8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8cf1661e4614f80a88ce9ac5ec47a533db45bc3ea201536ff258295e437aef8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8cf1661e4614f80a88ce9ac5ec47a533db45bc3ea201536ff258295e437aef8", kill_on_drop: false }`
[INFO] [stdout] d8cf1661e4614f80a88ce9ac5ec47a533db45bc3ea201536ff258295e437aef8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f18ccb8a7882fdd8637a04f2cbf6537d8c4135781450cd058aab939d4879caaa
[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" "f18ccb8a7882fdd8637a04f2cbf6537d8c4135781450cd058aab939d4879caaa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling inotify-sys v0.1.5
[INFO] [stderr]    Compiling filetime v0.2.15
[INFO] [stderr]    Compiling inotify v0.7.1
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling notify v4.0.17
[INFO] [stderr]    Compiling webpki v0.21.4
[INFO] [stderr]    Compiling sct v0.6.1
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling rustls v0.19.1
[INFO] [stderr]    Compiling webpki-roots v0.21.1
[INFO] [stderr]    Compiling ureq v2.2.0
[INFO] [stderr]    Compiling cloudlog-adifwatch v0.0.9 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     read_initializer,
[INFO] [stdout] 3 | |     maybe_uninit_slice,
[INFO] [stdout] 4 | |     vec_spare_capacity
[INFO] [stdout] 5 | | )]
[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 `cloudlog-adifwatch` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "f18ccb8a7882fdd8637a04f2cbf6537d8c4135781450cd058aab939d4879caaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f18ccb8a7882fdd8637a04f2cbf6537d8c4135781450cd058aab939d4879caaa", kill_on_drop: false }`
[INFO] [stdout] f18ccb8a7882fdd8637a04f2cbf6537d8c4135781450cd058aab939d4879caaa