[INFO] fetching crate code-sandwich-crates-io-release-test 0.1.4...
[INFO] testing code-sandwich-crates-io-release-test-0.1.4 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate code-sandwich-crates-io-release-test 0.1.4 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate code-sandwich-crates-io-release-test 0.1.4 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 code-sandwich-crates-io-release-test 0.1.4
[INFO] finished tweaking crates.io crate code-sandwich-crates-io-release-test 0.1.4
[INFO] tweaked toml for crates.io crate code-sandwich-crates-io-release-test 0.1.4 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded code-sandwich-crates-io-release-test-macros v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] c19a420586e86ea8e6a3f8f50b697ae6dc27f09c006cd09bb69939bb77b654f7
[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" "c19a420586e86ea8e6a3f8f50b697ae6dc27f09c006cd09bb69939bb77b654f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c19a420586e86ea8e6a3f8f50b697ae6dc27f09c006cd09bb69939bb77b654f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c19a420586e86ea8e6a3f8f50b697ae6dc27f09c006cd09bb69939bb77b654f7", kill_on_drop: false }`
[INFO] [stdout] c19a420586e86ea8e6a3f8f50b697ae6dc27f09c006cd09bb69939bb77b654f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 66bb1e40f93d2104d6e7c82998bd8654b6239b3c3b704586ca48c9041da933d8
[INFO] running `Command { std: "docker" "start" "-a" "66bb1e40f93d2104d6e7c82998bd8654b6239b3c3b704586ca48c9041da933d8", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling code-sandwich-crates-io-release-test-macros v0.1.1
[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/code-sandwich-crates-io-release-test-macros-0.1.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `proc_macro` has been stable since 1.29.0 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 `code-sandwich-crates-io-release-test-macros` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "66bb1e40f93d2104d6e7c82998bd8654b6239b3c3b704586ca48c9041da933d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66bb1e40f93d2104d6e7c82998bd8654b6239b3c3b704586ca48c9041da933d8", kill_on_drop: false }`
[INFO] [stdout] 66bb1e40f93d2104d6e7c82998bd8654b6239b3c3b704586ca48c9041da933d8