[INFO] fetching crate code-sandwich-crates-io-release-test 0.1.4...
[INFO] documenting code-sandwich-crates-io-release-test-0.1.4 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate code-sandwich-crates-io-release-test 0.1.4 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate code-sandwich-crates-io-release-test 0.1.4 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", 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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "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] 080e60865cf05ead43bb3865b8dad7e9ffc583cea32702c0078504a16b72c145
[INFO] running `Command { std: "docker" "start" "-a" "080e60865cf05ead43bb3865b8dad7e9ffc583cea32702c0078504a16b72c145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "080e60865cf05ead43bb3865b8dad7e9ffc583cea32702c0078504a16b72c145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "080e60865cf05ead43bb3865b8dad7e9ffc583cea32702c0078504a16b72c145", kill_on_drop: false }`
[INFO] [stdout] 080e60865cf05ead43bb3865b8dad7e9ffc583cea32702c0078504a16b72c145
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "RUSTDOCFLAGS=--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d1253abe4ad1e0c3d85b4dd3be16b634baa5600a2391346cf82c123aaf5dc214
[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" "d1253abe4ad1e0c3d85b4dd3be16b634baa5600a2391346cf82c123aaf5dc214", kill_on_drop: false }`
[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]   | ^^^^^^^^^^^^^^^^^^^^^^^
[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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d1253abe4ad1e0c3d85b4dd3be16b634baa5600a2391346cf82c123aaf5dc214", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1253abe4ad1e0c3d85b4dd3be16b634baa5600a2391346cf82c123aaf5dc214", kill_on_drop: false }`
[INFO] [stdout] d1253abe4ad1e0c3d85b4dd3be16b634baa5600a2391346cf82c123aaf5dc214
