[INFO] fetching crate linux-support 0.0.1...
[INFO] documenting linux-support-0.0.1 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate linux-support 0.0.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate linux-support 0.0.1 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate linux-support 0.0.1
[INFO] finished tweaking crates.io crate linux-support 0.0.1
[INFO] tweaked toml for crates.io crate linux-support 0.0.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d25a42a6d62eb93cefb4c6d6ae1d16f22610f7df7d01af8056a7379689ec66a
[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" "1d25a42a6d62eb93cefb4c6d6ae1d16f22610f7df7d01af8056a7379689ec66a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d25a42a6d62eb93cefb4c6d6ae1d16f22610f7df7d01af8056a7379689ec66a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d25a42a6d62eb93cefb4c6d6ae1d16f22610f7df7d01af8056a7379689ec66a", kill_on_drop: false }`
[INFO] [stdout] 1d25a42a6d62eb93cefb4c6d6ae1d16f22610f7df7d01af8056a7379689ec66a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f3b2bdbefec6cb5d3d3e8acffaf99919c6ae1a1acd6de1c9b4349860d6ce8c9
[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" "7f3b2bdbefec6cb5d3d3e8acffaf99919c6ae1a1acd6de1c9b4349860d6ce8c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking strum v0.18.0
[INFO] [stderr]     Checking bit-vec v0.6.2
[INFO] [stderr]     Checking likely v0.1.0
[INFO] [stderr]     Checking streaming-iterator v0.1.5
[INFO] [stderr]     Checking const_fn_assert v0.1.2
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling raw-cpuid v5.0.0
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking indexmap v1.6.0
[INFO] [stderr]     Checking serde_bytes v0.11.5
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/memoffset-0.5.6/src/lib.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | /     feature(
[INFO] [stdout] 63 | |         ptr_offset_from,
[INFO] [stdout] 64 | |         const_fn,
[INFO] [stdout] 65 | |         const_ptr_offset_from,
[INFO] [stdout] 66 | |         const_maybe_uninit_as_ptr,
[INFO] [stdout] 67 | |         const_raw_ptr_deref,
[INFO] [stdout] 68 | |     )
[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 `memoffset`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7f3b2bdbefec6cb5d3d3e8acffaf99919c6ae1a1acd6de1c9b4349860d6ce8c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f3b2bdbefec6cb5d3d3e8acffaf99919c6ae1a1acd6de1c9b4349860d6ce8c9", kill_on_drop: false }`
[INFO] [stdout] 7f3b2bdbefec6cb5d3d3e8acffaf99919c6ae1a1acd6de1c9b4349860d6ce8c9
