[INFO] cloning repository https://github.com/retep007/rustybox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/retep007/rustybox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fretep007%2Frustybox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fretep007%2Frustybox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66aa7400ecaf7abbdc9136253c3f8a63217bd69b
[INFO] documenting retep007/rustybox against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fretep007%2Frustybox" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/retep007/rustybox on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/retep007/rustybox
[INFO] finished tweaking git repo https://github.com/retep007/rustybox
[INFO] tweaked toml for git repo https://github.com/retep007/rustybox written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/retep007/rustybox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "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] 4d00a993b7c93f1ee6ab4e657d74dc4ef99f544f0863a7a825d45869ed2a6d3d
[INFO] running `Command { std: "docker" "start" "-a" "4d00a993b7c93f1ee6ab4e657d74dc4ef99f544f0863a7a825d45869ed2a6d3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d00a993b7c93f1ee6ab4e657d74dc4ef99f544f0863a7a825d45869ed2a6d3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d00a993b7c93f1ee6ab4e657d74dc4ef99f544f0863a7a825d45869ed2a6d3d", kill_on_drop: false }`
[INFO] [stdout] 4d00a993b7c93f1ee6ab4e657d74dc4ef99f544f0863a7a825d45869ed2a6d3d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d838221365d9fe6b6c1506ddd71b428dce670f1170e8abe6c25151ff101fa1d9
[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" "d838221365d9fe6b6c1506ddd71b428dce670f1170e8abe6c25151ff101fa1d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]    Compiling ucd-trie v0.1.2
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking unicode-segmentation v1.5.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking pest v2.1.2
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling pest_meta v2.1.2
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]    Compiling pest_generator v2.1.1
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking pretty_env_logger v0.3.1
[INFO] [stderr]     Checking ctrlc v3.1.3
[INFO] [stderr]     Checking rustyline v5.0.4
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]  Documenting crabbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: type ascription is experimental
[INFO] [stdout]   --> src/rcrab.rs:87:28
[INFO] [stdout]    |
[INFO] [stdout] 87 |                 stdin.read(buf: &mut [u8])
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #23416 <https://github.com/rust-lang/rust/issues/23416> for more information
[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 E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `crabbox`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name crabbox src/main.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-e0b8378fe2795aa2.rmeta --extern ctrlc=/opt/rustwide/target/debug/deps/libctrlc-afef229c5407a33d.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-5063a5c726a68b7d.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-1b53669f640bf8d7.rmeta --extern mio=/opt/rustwide/target/debug/deps/libmio-5ce0845678ddbedb.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-80dcbe61988b921e.rmeta --extern pest=/opt/rustwide/target/debug/deps/libpest-98761fd79b4c6291.rmeta --extern pest_derive=/opt/rustwide/target/debug/deps/libpest_derive-bb1e29ba8fbc441a.so --extern pretty_env_logger=/opt/rustwide/target/debug/deps/libpretty_env_logger-d43a1f833808d032.rmeta --extern rustyline=/opt/rustwide/target/debug/deps/librustyline-477f43db3a169cc5.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "d838221365d9fe6b6c1506ddd71b428dce670f1170e8abe6c25151ff101fa1d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d838221365d9fe6b6c1506ddd71b428dce670f1170e8abe6c25151ff101fa1d9", kill_on_drop: false }`
[INFO] [stdout] d838221365d9fe6b6c1506ddd71b428dce670f1170e8abe6c25151ff101fa1d9
