[INFO] fetching crate fozzie 1.3.6...
[INFO] documenting fozzie-1.3.6 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate fozzie 1.3.6 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate fozzie 1.3.6 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 fozzie 1.3.6
[INFO] finished tweaking crates.io crate fozzie 1.3.6
[INFO] tweaked toml for crates.io crate fozzie 1.3.6 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate fozzie 1.3.6 already has a lockfile, it will not be regenerated
[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 raw_tty v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] ad25e008a03c7b3e9a87a1ed6252b46551ea48d7b573f08de0a8d723f69964df
[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" "ad25e008a03c7b3e9a87a1ed6252b46551ea48d7b573f08de0a8d723f69964df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad25e008a03c7b3e9a87a1ed6252b46551ea48d7b573f08de0a8d723f69964df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad25e008a03c7b3e9a87a1ed6252b46551ea48d7b573f08de0a8d723f69964df", kill_on_drop: false }`
[INFO] [stdout] ad25e008a03c7b3e9a87a1ed6252b46551ea48d7b573f08de0a8d723f69964df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 98cb91ef1b58a8f92651877892380470e8a04220e76fe4575a1deb324bd650fe
[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" "98cb91ef1b58a8f92651877892380470e8a04220e76fe4575a1deb324bd650fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]     Checking crossbeam-epoch v0.9.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling derive_more v0.14.1
[INFO] [stderr]    Compiling fozzie v1.3.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking raw_tty v0.1.0
[INFO] [stderr]  Documenting fozzie v1.3.6 (/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(test)]
[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 `fozzie`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name fozzie 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-a62a4e09b7aef6f5.rmeta --extern float_cmp=/opt/rustwide/target/debug/deps/libfloat_cmp-58a39f859ff24897.rmeta --extern raw_tty=/opt/rustwide/target/debug/deps/libraw_tty-5327b57607424ef1.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-c0df6795a3212b2e.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-fd7c22c517e8d025.rmeta --extern terminal_size=/opt/rustwide/target/debug/deps/libterminal_size-08cc1491ebc3ad77.rmeta --extern termion=/opt/rustwide/target/debug/deps/libtermion-9821fe6411cd02d0.rmeta --cap-lints=warn --crate-version 1.3.6` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "98cb91ef1b58a8f92651877892380470e8a04220e76fe4575a1deb324bd650fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98cb91ef1b58a8f92651877892380470e8a04220e76fe4575a1deb324bd650fe", kill_on_drop: false }`
[INFO] [stdout] 98cb91ef1b58a8f92651877892380470e8a04220e76fe4575a1deb324bd650fe
