[INFO] fetching crate traitlit 0.2.2...
[INFO] documenting traitlit-0.2.2 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate traitlit 0.2.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate traitlit 0.2.2 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 traitlit 0.2.2
[INFO] finished tweaking crates.io crate traitlit 0.2.2
[INFO] tweaked toml for crates.io crate traitlit 0.2.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-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] e7406435803e1ddcdfb8d094a277a9d428f56950a67a3f2ee9c398b2667a4fd7
[INFO] running `Command { std: "docker" "start" "-a" "e7406435803e1ddcdfb8d094a277a9d428f56950a67a3f2ee9c398b2667a4fd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7406435803e1ddcdfb8d094a277a9d428f56950a67a3f2ee9c398b2667a4fd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7406435803e1ddcdfb8d094a277a9d428f56950a67a3f2ee9c398b2667a4fd7", kill_on_drop: false }`
[INFO] [stdout] e7406435803e1ddcdfb8d094a277a9d428f56950a67a3f2ee9c398b2667a4fd7
[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] 1cb4358598e73f0994458a78a66f991a100f818f2cfe5107ed0823d5b717a8ed
[INFO] running `Command { std: "docker" "start" "-a" "1cb4358598e73f0994458a78a66f991a100f818f2cfe5107ed0823d5b717a8ed", kill_on_drop: false }`
[INFO] [stderr]  Documenting traitlit v0.2.2 (/opt/rustwide/workdir)
[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(proc_macro_diagnostic)]
[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 `traitlit`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name traitlit 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 proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-090933bff3787708.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-22f4df73ab552e17.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-9f3c913b03b62af2.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.2.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1cb4358598e73f0994458a78a66f991a100f818f2cfe5107ed0823d5b717a8ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cb4358598e73f0994458a78a66f991a100f818f2cfe5107ed0823d5b717a8ed", kill_on_drop: false }`
[INFO] [stdout] 1cb4358598e73f0994458a78a66f991a100f818f2cfe5107ed0823d5b717a8ed
