[INFO] fetching crate sidetree 0.3.0...
[INFO] documenting sidetree-0.3.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate sidetree 0.3.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate sidetree 0.3.0 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 sidetree 0.3.0
[INFO] finished tweaking crates.io crate sidetree 0.3.0
[INFO] tweaked toml for crates.io crate sidetree 0.3.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate sidetree 0.3.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 1926311f74d65af56c4d441b78ba9ad4f261b212ab7068fe815643fbca80664b
[INFO] running `Command { std: "docker" "start" "-a" "1926311f74d65af56c4d441b78ba9ad4f261b212ab7068fe815643fbca80664b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1926311f74d65af56c4d441b78ba9ad4f261b212ab7068fe815643fbca80664b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1926311f74d65af56c4d441b78ba9ad4f261b212ab7068fe815643fbca80664b", kill_on_drop: false }`
[INFO] [stdout] 1926311f74d65af56c4d441b78ba9ad4f261b212ab7068fe815643fbca80664b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] bd75140a193f10306e4c3cf2bdc6a87cb8ed18e35d9df3c1dcbef2826578afaa
[INFO] running `Command { std: "docker" "start" "-a" "bd75140a193f10306e4c3cf2bdc6a87cb8ed18e35d9df3c1dcbef2826578afaa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]     Checking unicode-segmentation v1.7.1
[INFO] [stderr]     Checking xdg v2.2.0
[INFO] [stderr]     Checking path-dedot v3.0.12
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]     Checking memchr v2.3.4
[INFO] [stderr]     Checking path-absolutize v3.0.10
[INFO] [stderr]     Checking combine v4.5.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking tui v0.14.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]  Documenting sidetree v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `sidetree`
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generators, generator_trait)]
[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 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name sidetree 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-3ad3f4bae935bab7.rmeta --extern combine=/opt/rustwide/target/debug/deps/libcombine-6ea6dd6e1e2f4717.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern path_absolutize=/opt/rustwide/target/debug/deps/libpath_absolutize-fb136209d6763fd3.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-d6a3c51b340eb114.rmeta --extern termion=/opt/rustwide/target/debug/deps/libtermion-60b5b7e21b639dbe.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-f3bbccb8f4db6338.rmeta --extern tui=/opt/rustwide/target/debug/deps/libtui-fb26029e36c29a7f.rmeta --extern unicode_width=/opt/rustwide/target/debug/deps/libunicode_width-c081668b317203dd.rmeta --extern xdg=/opt/rustwide/target/debug/deps/libxdg-9532df82782d441c.rmeta --cap-lints=warn --crate-version 0.3.0` (exit status: 1)
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bd75140a193f10306e4c3cf2bdc6a87cb8ed18e35d9df3c1dcbef2826578afaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd75140a193f10306e4c3cf2bdc6a87cb8ed18e35d9df3c1dcbef2826578afaa", kill_on_drop: false }`
[INFO] [stdout] bd75140a193f10306e4c3cf2bdc6a87cb8ed18e35d9df3c1dcbef2826578afaa
