[INFO] fetching crate dtd-macro 0.1.0-alpha2...
[INFO] documenting dtd-macro-0.1.0-alpha2 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate dtd-macro 0.1.0-alpha2 into /workspace/builds/worker-64/source
[INFO] validating manifest of crates.io crate dtd-macro 0.1.0-alpha2 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 dtd-macro 0.1.0-alpha2
[INFO] finished tweaking crates.io crate dtd-macro 0.1.0-alpha2
[INFO] tweaked toml for crates.io crate dtd-macro 0.1.0-alpha2 written to /workspace/builds/worker-64/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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] 1eaaab5860240334db6f8fff7d414908b4c355760abb205c0d9bb780f9323f0d
[INFO] running `Command { std: "docker" "start" "-a" "1eaaab5860240334db6f8fff7d414908b4c355760abb205c0d9bb780f9323f0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1eaaab5860240334db6f8fff7d414908b4c355760abb205c0d9bb780f9323f0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eaaab5860240334db6f8fff7d414908b4c355760abb205c0d9bb780f9323f0d", kill_on_drop: false }`
[INFO] [stdout] 1eaaab5860240334db6f8fff7d414908b4c355760abb205c0d9bb780f9323f0d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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] 1341a6eceabe8129ef738f2f5985a0a1fa12ed0d63d32214692321eb4116603a
[INFO] running `Command { std: "docker" "start" "-a" "1341a6eceabe8129ef738f2f5985a0a1fa12ed0d63d32214692321eb4116603a", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking bytecount v0.6.2
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking bytecount v0.3.2
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling nom v6.2.1
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]     Checking bitvec v0.19.6
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]     Checking regex v1.4.6
[INFO] [stderr]     Checking Inflector v0.11.4
[INFO] [stderr]     Checking nom_locate v1.0.0
[INFO] [stderr]     Checking nom_locate v2.1.0
[INFO] [stderr]     Checking nom_locate v3.0.2
[INFO] [stderr]     Checking nom-greedyerror v0.3.1
[INFO] [stderr]    Compiling nom-tracable-macros v0.7.0
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking nom-tracable v0.7.0
[INFO] [stderr]     Checking dtd-parser v0.1.0-alpha3
[INFO] [stderr]  Documenting dtd-macro v0.1.0-alpha2 (/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 `dtd-macro`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name dtd_macro src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=a93082928e9c08ad -L dependency=/opt/rustwide/target/debug/deps --extern inflector=/opt/rustwide/target/debug/deps/libinflector-63298b5a9ecaa869.rmeta --extern dtd_parser=/opt/rustwide/target/debug/deps/libdtd_parser-51f1ad556f588fdb.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-6064c547db161c5f.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-a1ccd1e2bce2d5da.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-f005b236803176a6.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.0-alpha2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1341a6eceabe8129ef738f2f5985a0a1fa12ed0d63d32214692321eb4116603a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1341a6eceabe8129ef738f2f5985a0a1fa12ed0d63d32214692321eb4116603a", kill_on_drop: false }`
[INFO] [stdout] 1341a6eceabe8129ef738f2f5985a0a1fa12ed0d63d32214692321eb4116603a