[INFO] fetching crate iso-macro 0.0.5...
[INFO] documenting iso-macro-0.0.5 against beta-2023-04-20 for beta-1.70-rustdoc-1
[INFO] extracting crate iso-macro 0.0.5 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate iso-macro 0.0.5 on toolchain beta-2023-04-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate iso-macro 0.0.5
[INFO] finished tweaking crates.io crate iso-macro 0.0.5
[INFO] tweaked toml for crates.io crate iso-macro 0.0.5 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39174a9926917976b030881bea6c72d83af201d2e1e9950194ba8cc5a270206b
[INFO] running `Command { std: "docker" "start" "-a" "39174a9926917976b030881bea6c72d83af201d2e1e9950194ba8cc5a270206b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39174a9926917976b030881bea6c72d83af201d2e1e9950194ba8cc5a270206b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39174a9926917976b030881bea6c72d83af201d2e1e9950194ba8cc5a270206b", kill_on_drop: false }`
[INFO] [stdout] 39174a9926917976b030881bea6c72d83af201d2e1e9950194ba8cc5a270206b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b712746eb7d6998e56dd5245646b9324ec3bb9ad7cf0626dd7e29daf58ac71e
[INFO] running `Command { std: "docker" "start" "-a" "1b712746eb7d6998e56dd5245646b9324ec3bb9ad7cf0626dd7e29daf58ac71e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking proc-macro2 v1.0.56
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking quote v1.0.26
[INFO] [stderr]  Documenting iso-macro v0.0.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 | #![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 `iso-macro`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name iso_macro src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=d8346ca5ff08067a -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-51d880c542a9af92.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-a52e91a248d06c41.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-81d0c2ec6d74644c.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-ad0b6b53eede4359.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-8815a5ebc601073b.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.0.5` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1b712746eb7d6998e56dd5245646b9324ec3bb9ad7cf0626dd7e29daf58ac71e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b712746eb7d6998e56dd5245646b9324ec3bb9ad7cf0626dd7e29daf58ac71e", kill_on_drop: false }`
[INFO] [stdout] 1b712746eb7d6998e56dd5245646b9324ec3bb9ad7cf0626dd7e29daf58ac71e
