[INFO] fetching crate fozzie 1.3.6...
[INFO] documenting fozzie-1.3.6 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate fozzie 1.3.6 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate fozzie 1.3.6 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 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-1/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" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] fd33f3ed888f1e2812f7cd414684f880639e6f9bea60ff1c5c481c1cce7032b7
[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" "fd33f3ed888f1e2812f7cd414684f880639e6f9bea60ff1c5c481c1cce7032b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd33f3ed888f1e2812f7cd414684f880639e6f9bea60ff1c5c481c1cce7032b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd33f3ed888f1e2812f7cd414684f880639e6f9bea60ff1c5c481c1cce7032b7", kill_on_drop: false }`
[INFO] [stdout] fd33f3ed888f1e2812f7cd414684f880639e6f9bea60ff1c5c481c1cce7032b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 1e8151fc3d7940e10b167c8326d0070964e63a07909150421fdce24758cfe352
[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" "1e8151fc3d7940e10b167c8326d0070964e63a07909150421fdce24758cfe352", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Checking float-cmp v0.8.0
[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]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking rayon v1.5.1
[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] [stderr] error: could not document `fozzie`
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[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-2b91f1e907407d84.rmeta --extern float_cmp=/opt/rustwide/target/debug/deps/libfloat_cmp-9307486c5a128f77.rmeta --extern raw_tty=/opt/rustwide/target/debug/deps/libraw_tty-873cb4de371d757e.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-55de960290ecfbae.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-46bf5b535d6b6b09.rmeta --extern terminal_size=/opt/rustwide/target/debug/deps/libterminal_size-0bb68a0877c5f0aa.rmeta --extern termion=/opt/rustwide/target/debug/deps/libtermion-03ca0d923434035d.rmeta --cap-lints=warn --crate-version 1.3.6` (exit status: 1)
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1e8151fc3d7940e10b167c8326d0070964e63a07909150421fdce24758cfe352", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e8151fc3d7940e10b167c8326d0070964e63a07909150421fdce24758cfe352", kill_on_drop: false }`
[INFO] [stdout] 1e8151fc3d7940e10b167c8326d0070964e63a07909150421fdce24758cfe352
