[INFO] fetching crate total-space 0.1.1...
[INFO] documenting total-space-0.1.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate total-space 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate total-space 0.1.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate total-space 0.1.1
[INFO] finished tweaking crates.io crate total-space 0.1.1
[INFO] tweaked toml for crates.io crate total-space 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate total-space 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fdf878abd5953797198cf8cd51639b4d615a50da83753f260f12e27ca0d05585
[INFO] running `Command { std: "docker" "start" "-a" "fdf878abd5953797198cf8cd51639b4d615a50da83753f260f12e27ca0d05585", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fdf878abd5953797198cf8cd51639b4d615a50da83753f260f12e27ca0d05585", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdf878abd5953797198cf8cd51639b4d615a50da83753f260f12e27ca0d05585", kill_on_drop: false }`
[INFO] [stdout] fdf878abd5953797198cf8cd51639b4d615a50da83753f260f12e27ca0d05585
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85cb0437528ae243f07b60f6b196b15d55224cee9e5a749e7b177bc7caba4e20
[INFO] running `Command { std: "docker" "start" "-a" "85cb0437528ae243f07b60f6b196b15d55224cee9e5a749e7b177bc7caba4e20", 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 libc v0.2.86
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]     Checking siphasher v0.3.3
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]    Compiling ahash v0.7.2
[INFO] [stderr]     Checking phf_shared v0.8.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]     Checking strum v0.20.0
[INFO] [stderr]     Checking string_cache v0.8.1
[INFO] [stderr]  Documenting total-space v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(trait_alias)]
[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 `total-space`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name total_space 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 clap=/opt/rustwide/target/debug/deps/libclap-51ad346f9ff1ee24.rmeta --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-35d240f93f168ae3.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-19eddd40197aec2d.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-7b4b23fd2d6f4298.rmeta --extern string_cache=/opt/rustwide/target/debug/deps/libstring_cache-0d1f58e69577f969.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-f17224a3cd28257a.rmeta --extern strum_macros=/opt/rustwide/target/debug/deps/libstrum_macros-d6e4116f28cc38a1.so --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "85cb0437528ae243f07b60f6b196b15d55224cee9e5a749e7b177bc7caba4e20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85cb0437528ae243f07b60f6b196b15d55224cee9e5a749e7b177bc7caba4e20", kill_on_drop: false }`
[INFO] [stdout] 85cb0437528ae243f07b60f6b196b15d55224cee9e5a749e7b177bc7caba4e20
