[INFO] fetching crate gitmoji 1.0.0...
[INFO] documenting gitmoji-1.0.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate gitmoji 1.0.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate gitmoji 1.0.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gitmoji 1.0.0
[INFO] finished tweaking crates.io crate gitmoji 1.0.0
[INFO] tweaked toml for crates.io crate gitmoji 1.0.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate gitmoji 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spinners v1.2.0
[INFO] [stderr]   Downloaded directories v0.10.0
[INFO] [stderr]   Downloaded json v0.12.1
[INFO] [stderr]   Downloaded openssl v0.10.27
[INFO] [stderr]   Downloaded spinner v0.5.0
[INFO] [stderr]   Downloaded enquirer v0.3.0
[INFO] [stderr]   Downloaded confy v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+beta-2020-08-29" "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] 85cd80b8972d06ed0b9b75ed292d850c5e778523a1f65ce5c75eae37afe4cbb0
[INFO] running `Command { std: "docker" "start" "-a" "85cd80b8972d06ed0b9b75ed292d850c5e778523a1f65ce5c75eae37afe4cbb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85cd80b8972d06ed0b9b75ed292d850c5e778523a1f65ce5c75eae37afe4cbb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85cd80b8972d06ed0b9b75ed292d850c5e778523a1f65ce5c75eae37afe4cbb0", kill_on_drop: false }`
[INFO] [stdout] 85cd80b8972d06ed0b9b75ed292d850c5e778523a1f65ce5c75eae37afe4cbb0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", 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] c22756b823963ce7cea8d17632d2f21c21a0445e97144debda11b3343791edb5
[INFO] running `Command { std: "docker" "start" "-a" "c22756b823963ce7cea8d17632d2f21c21a0445e97144debda11b3343791edb5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling openssl v0.10.27
[INFO] [stderr]     Checking ansi_term v0.7.5
[INFO] [stderr]     Checking strum v0.8.0
[INFO] [stderr]     Checking directories v0.10.0
[INFO] [stderr]     Checking json v0.12.1
[INFO] [stderr]     Checking once_cell v1.3.1
[INFO] [stderr]    Compiling openssl-sys v0.9.54
[INFO] [stderr]    Compiling indexmap v1.3.1
[INFO] [stderr]     Checking http v0.2.0
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]    Compiling strum_macros v0.8.0
[INFO] [stderr]     Checking serde_json v1.0.45
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]     Checking tokio v0.2.11
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking spinner v0.5.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking confy v0.3.1
[INFO] [stderr]     Checking spinners v1.2.0
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling proc-macro-error v0.4.8
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.8
[INFO] [stderr]    Compiling structopt-derive v0.4.2
[INFO] [stderr]     Checking pin-project v0.4.8
[INFO] [stderr]     Checking hyper v0.13.2
[INFO] [stderr]     Checking structopt v0.3.9
[INFO] [stderr]     Checking enquirer v0.3.0
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.1
[INFO] [stderr]  Documenting gitmoji v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/main.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![feature(with_options)]
[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 `gitmoji`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name gitmoji 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-34068b35d4348847.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-bcc976a9069333cb.rmeta --extern confy=/opt/rustwide/target/debug/deps/libconfy-9ed8b4acf0081560.rmeta --extern dialoguer=/opt/rustwide/target/debug/deps/libdialoguer-3ae0a6a344759344.rmeta --extern dirs=/opt/rustwide/target/debug/deps/libdirs-0077cb11dc92a5d0.rmeta --extern enquirer=/opt/rustwide/target/debug/deps/libenquirer-3ff2ca7e3e06b472.rmeta --extern json=/opt/rustwide/target/debug/deps/libjson-43278604222b21c7.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-5ed60f321ecee332.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-ffe8636f010c6fed.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-92e6041116e22f27.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-16019b56d7d7616d.so --extern spinners=/opt/rustwide/target/debug/deps/libspinners-fe068bd20e7220de.rmeta --cap-lints=warn --crate-version 1.0.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "c22756b823963ce7cea8d17632d2f21c21a0445e97144debda11b3343791edb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c22756b823963ce7cea8d17632d2f21c21a0445e97144debda11b3343791edb5", kill_on_drop: false }`
[INFO] [stdout] c22756b823963ce7cea8d17632d2f21c21a0445e97144debda11b3343791edb5