[INFO] fetching crate unbounded-spsc 0.1.6...
[INFO] documenting unbounded-spsc-0.1.6 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate unbounded-spsc 0.1.6 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate unbounded-spsc 0.1.6 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 unbounded-spsc 0.1.6
[INFO] finished tweaking crates.io crate unbounded-spsc 0.1.6
[INFO] tweaked toml for crates.io crate unbounded-spsc 0.1.6 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate unbounded-spsc 0.1.6 already has a lockfile, it will not be regenerated
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stdout] a064cdcbc3e985150c5b8dcb97084ba6b5b4a3987cff4e3b4d35b632d6bf2193
[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" "a064cdcbc3e985150c5b8dcb97084ba6b5b4a3987cff4e3b4d35b632d6bf2193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a064cdcbc3e985150c5b8dcb97084ba6b5b4a3987cff4e3b4d35b632d6bf2193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a064cdcbc3e985150c5b8dcb97084ba6b5b4a3987cff4e3b4d35b632d6bf2193", kill_on_drop: false }`
[INFO] [stdout] a064cdcbc3e985150c5b8dcb97084ba6b5b4a3987cff4e3b4d35b632d6bf2193
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] b2bf1d664be5c7e359cc0d97c2756c5f54e8b0b912e41601a2ee235be5f96415
[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" "b2bf1d664be5c7e359cc0d97c2756c5f54e8b0b912e41601a2ee235be5f96415", kill_on_drop: false }`
[INFO] [stderr]     Checking bounded-spsc-queue v0.4.0
[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/bounded-spsc-queue-0.4.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bounded-spsc-queue`
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "b2bf1d664be5c7e359cc0d97c2756c5f54e8b0b912e41601a2ee235be5f96415", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2bf1d664be5c7e359cc0d97c2756c5f54e8b0b912e41601a2ee235be5f96415", kill_on_drop: false }`
[INFO] [stdout] b2bf1d664be5c7e359cc0d97c2756c5f54e8b0b912e41601a2ee235be5f96415
