[INFO] fetching crate object-space 0.1.1...
[INFO] documenting object-space-0.1.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate object-space 0.1.1 into /workspace/builds/worker-44/source
[INFO] validating manifest of crates.io crate object-space 0.1.1 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate object-space 0.1.1
[INFO] finished tweaking crates.io crate object-space 0.1.1
[INFO] tweaked toml for crates.io crate object-space 0.1.1 written to /workspace/builds/worker-44/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ordered-float v0.5.2
[INFO] [stderr]   Downloaded png v0.11.0
[INFO] [stderr]   Downloaded gif v0.9.2
[INFO] [stderr]   Downloaded image v0.18.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e393bde2fd9535a37c2a2ef91e7bfcc352fc95076e5c39d26ca67a3c76a72c0e
[INFO] running `Command { std: "docker" "start" "-a" "e393bde2fd9535a37c2a2ef91e7bfcc352fc95076e5c39d26ca67a3c76a72c0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e393bde2fd9535a37c2a2ef91e7bfcc352fc95076e5c39d26ca67a3c76a72c0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e393bde2fd9535a37c2a2ef91e7bfcc352fc95076e5c39d26ca67a3c76a72c0e", kill_on_drop: false }`
[INFO] [stdout] e393bde2fd9535a37c2a2ef91e7bfcc352fc95076e5c39d26ca67a3c76a72c0e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1783d68bc094fe513cdba7ca439e6156a28cdefb8fdeb3549e948c15d0efc71c
[INFO] running `Command { std: "docker" "start" "-a" "1783d68bc094fe513cdba7ca439e6156a28cdefb8fdeb3549e948c15d0efc71c", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking parking_lot v0.4.8
[INFO] [stderr]     Checking chashmap v2.2.2
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking ordered-float v0.5.2
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]     Checking serde_json v1.0.66
[INFO] [stderr]  Documenting object-space v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:134:1
[INFO] [stdout]     |
[INFO] [stdout] 134 | #![feature(collections_range)]
[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 `object-space`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name object_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 chashmap=/opt/rustwide/target/debug/deps/libchashmap-b0e377228cf1d544.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-bb2d0fec3a2425f4.rmeta --extern ordered_float=/opt/rustwide/target/debug/deps/libordered_float-f0e1b188d10c9d0a.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-6a5809dcce96c926.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-a66a1fdf9c467eb8.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-f6976e00c51eb486.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1783d68bc094fe513cdba7ca439e6156a28cdefb8fdeb3549e948c15d0efc71c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1783d68bc094fe513cdba7ca439e6156a28cdefb8fdeb3549e948c15d0efc71c", kill_on_drop: false }`
[INFO] [stdout] 1783d68bc094fe513cdba7ca439e6156a28cdefb8fdeb3549e948c15d0efc71c
