[INFO] fetching crate linux-support-common 0.0.0...
[INFO] documenting linux-support-common-0.0.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate linux-support-common 0.0.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate linux-support-common 0.0.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate linux-support-common 0.0.0
[INFO] finished tweaking crates.io crate linux-support-common 0.0.0
[INFO] tweaked toml for crates.io crate linux-support-common 0.0.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd9a520dd221d9633683aea660640cab5716e0d853a222947ed43171453d0273
[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" "fd9a520dd221d9633683aea660640cab5716e0d853a222947ed43171453d0273", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd9a520dd221d9633683aea660640cab5716e0d853a222947ed43171453d0273", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd9a520dd221d9633683aea660640cab5716e0d853a222947ed43171453d0273", kill_on_drop: false }`
[INFO] [stdout] fd9a520dd221d9633683aea660640cab5716e0d853a222947ed43171453d0273
[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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4bce49aea214235c684f32452b2db569b8d339fa5b4d9a3bef67419d0b0245c
[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" "f4bce49aea214235c684f32452b2db569b8d339fa5b4d9a3bef67419d0b0245c", kill_on_drop: false }`
[INFO] [stderr]     Checking likely v0.1.0
[INFO] [stderr]    Compiling raw-cpuid v5.0.0
[INFO] [stderr]     Checking const-cstr-fork v0.2.2
[INFO] [stderr]     Checking errno v0.2.6
[INFO] [stderr]     Checking libc-extra v0.3.2
[INFO] [stderr]  Documenting linux-support-common v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(core_intrinsics)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `linux-support-common`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name linux_support_common src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-e1a9b9121eac1683.rmeta --extern errno=/opt/rustwide/target/debug/deps/liberrno-b86e3bb36c1fe28b.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-b01e5f49cd1b74e8.rmeta --extern libc_extra=/opt/rustwide/target/debug/deps/liblibc_extra-7aef02cdf4de5ed6.rmeta --extern likely=/opt/rustwide/target/debug/deps/liblikely-e8a40cb4faab6f8d.rmeta --extern raw_cpuid=/opt/rustwide/target/debug/deps/libraw_cpuid-35752f8e2cfcf00e.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-d1f24ad445d04cd0.rmeta --extern static_assertions=/opt/rustwide/target/debug/deps/libstatic_assertions-cc8e46707ea09364.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-9175090273c7a8fe.rmeta --extern strum_macros=/opt/rustwide/target/debug/deps/libstrum_macros-ef608f6fa57c0953.so --cap-lints=warn --crate-version 0.0.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "f4bce49aea214235c684f32452b2db569b8d339fa5b4d9a3bef67419d0b0245c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4bce49aea214235c684f32452b2db569b8d339fa5b4d9a3bef67419d0b0245c", kill_on_drop: false }`
[INFO] [stdout] f4bce49aea214235c684f32452b2db569b8d339fa5b4d9a3bef67419d0b0245c