[INFO] fetching crate cargo_meta_proc 0.1.4...
[INFO] documenting cargo_meta_proc-0.1.4 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate cargo_meta_proc 0.1.4 into /workspace/builds/worker-100/source
[INFO] validating manifest of crates.io crate cargo_meta_proc 0.1.4 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo_meta_proc 0.1.4
[INFO] finished tweaking crates.io crate cargo_meta_proc 0.1.4
[INFO] tweaked toml for crates.io crate cargo_meta_proc 0.1.4 written to /workspace/builds/worker-100/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a00e1e064e2c2ee7d323ead6781631aaccc804f9bad0bb096f5b1c32d6a8f537
[INFO] running `Command { std: "docker" "start" "-a" "a00e1e064e2c2ee7d323ead6781631aaccc804f9bad0bb096f5b1c32d6a8f537", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a00e1e064e2c2ee7d323ead6781631aaccc804f9bad0bb096f5b1c32d6a8f537", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a00e1e064e2c2ee7d323ead6781631aaccc804f9bad0bb096f5b1c32d6a8f537", kill_on_drop: false }`
[INFO] [stdout] a00e1e064e2c2ee7d323ead6781631aaccc804f9bad0bb096f5b1c32d6a8f537
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20b157f245db2e05c7fa9fc8421b2a83d8670d841288257316a52155e015efe3
[INFO] running `Command { std: "docker" "start" "-a" "20b157f245db2e05c7fa9fc8421b2a83d8670d841288257316a52155e015efe3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking toml v0.5.9
[INFO] [stderr]  Documenting cargo_meta_proc v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_diagnostic)]
[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 document `cargo_meta_proc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name cargo_meta_proc src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=60c619efc6ab9f1f -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-a971ae87b0934651.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-37a689c692c11c2a.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-3dba20e30d2e9b0f.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-39b1692c4880c6ab.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "20b157f245db2e05c7fa9fc8421b2a83d8670d841288257316a52155e015efe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20b157f245db2e05c7fa9fc8421b2a83d8670d841288257316a52155e015efe3", kill_on_drop: false }`
[INFO] [stdout] 20b157f245db2e05c7fa9fc8421b2a83d8670d841288257316a52155e015efe3