[INFO] fetching crate ari 0.0.5...
[INFO] documenting ari-0.0.5 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate ari 0.0.5 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate ari 0.0.5 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 ari 0.0.5
[INFO] finished tweaking crates.io crate ari 0.0.5
[INFO] tweaked toml for crates.io crate ari 0.0.5 written to /workspace/builds/worker-11/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] 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] 2de558a54618ae720f7bb83072253b0eae84b658ff7e7e1dc7e0a24627154d79
[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" "2de558a54618ae720f7bb83072253b0eae84b658ff7e7e1dc7e0a24627154d79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2de558a54618ae720f7bb83072253b0eae84b658ff7e7e1dc7e0a24627154d79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2de558a54618ae720f7bb83072253b0eae84b658ff7e7e1dc7e0a24627154d79", kill_on_drop: false }`
[INFO] [stdout] 2de558a54618ae720f7bb83072253b0eae84b658ff7e7e1dc7e0a24627154d79
[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] 1d5a7028cf1ac3ed762adb4168cf746df4b767eaa3b78b21249feebab756a811
[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" "1d5a7028cf1ac3ed762adb4168cf746df4b767eaa3b78b21249feebab756a811", 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] [stderr]    Compiling winapi v0.3.9
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]    Compiling ari v0.0.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]  Documenting ari v0.0.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     box_syntax,
[INFO] [stdout] 3 | |     const_fn,
[INFO] [stdout] 4 | |     crate_visibility_modifier,
[INFO] [stdout] ... |
[INFO] [stdout] 8 | |     stmt_expr_attributes
[INFO] [stdout] 9 | | )]
[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 `ari`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name ari src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern libc=/opt/rustwide/target/debug/deps/liblibc-82c6b0e33b42e760.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-b5dbcc2daa2e7df6.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-f002fbfb67204ef8.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-05b22010c1859f50.rmeta --extern ring=/opt/rustwide/target/debug/deps/libring-4ae566d0dab5b732.rmeta --extern unicode_width=/opt/rustwide/target/debug/deps/libunicode_width-739dfd89b440ae34.rmeta --extern winapi=/opt/rustwide/target/debug/deps/libwinapi-5ef579e7dfeb99a2.rmeta --cap-lints=warn --crate-version 0.0.5 --cfg debug` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "1d5a7028cf1ac3ed762adb4168cf746df4b767eaa3b78b21249feebab756a811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d5a7028cf1ac3ed762adb4168cf746df4b767eaa3b78b21249feebab756a811", kill_on_drop: false }`
[INFO] [stdout] 1d5a7028cf1ac3ed762adb4168cf746df4b767eaa3b78b21249feebab756a811
