[INFO] fetching crate imdb-async 0.3.2...
[INFO] documenting imdb-async-0.3.2 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate imdb-async 0.3.2 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate imdb-async 0.3.2 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 imdb-async 0.3.2
[INFO] finished tweaking crates.io crate imdb-async 0.3.2
[INFO] tweaked toml for crates.io crate imdb-async 0.3.2 written to /workspace/builds/worker-5/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] 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 indexkv v0.2.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 29131af7f54ff027af859b03744f20363f1ac6485568bc2855814cb986827a5c
[INFO] running `Command { std: "docker" "start" "-a" "29131af7f54ff027af859b03744f20363f1ac6485568bc2855814cb986827a5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "29131af7f54ff027af859b03744f20363f1ac6485568bc2855814cb986827a5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29131af7f54ff027af859b03744f20363f1ac6485568bc2855814cb986827a5c", kill_on_drop: false }`
[INFO] [stdout] 29131af7f54ff027af859b03744f20363f1ac6485568bc2855814cb986827a5c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 9b10dbb322ee01dec2ecb782ddc91c11cdfbefc023953ecd8e77bf02f56391d9
[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" "9b10dbb322ee01dec2ecb782ddc91c11cdfbefc023953ecd8e77bf02f56391d9", kill_on_drop: false }`
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking ring v0.16.20
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]    Compiling serde_repr v0.1.7
[INFO] [stderr]     Checking serde v1.0.127
[INFO] [stderr]     Checking futures-util v0.3.16
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking async-compression v0.3.8
[INFO] [stderr]     Checking webpki v0.21.4
[INFO] [stderr]     Checking sct v0.6.1
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking rustls v0.18.1
[INFO] [stderr]     Checking webpki-roots v0.20.0
[INFO] [stderr]     Checking strum v0.20.0
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]     Checking futures-executor v0.3.16
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Checking csv-async v1.2.1
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-rustls v0.14.1
[INFO] [stderr]     Checking async-bincode v0.5.1
[INFO] [stderr]     Checking indexkv v0.2.9
[INFO] [stderr]    Compiling darling v0.13.0
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]    Compiling serde_with_macros v1.4.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/indexkv-0.2.9/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn_trait_bound)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `indexkv` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "9b10dbb322ee01dec2ecb782ddc91c11cdfbefc023953ecd8e77bf02f56391d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b10dbb322ee01dec2ecb782ddc91c11cdfbefc023953ecd8e77bf02f56391d9", kill_on_drop: false }`
[INFO] [stdout] 9b10dbb322ee01dec2ecb782ddc91c11cdfbefc023953ecd8e77bf02f56391d9
