[INFO] fetching crate trait_tests 0.3.3...
[INFO] documenting trait_tests-0.3.3 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate trait_tests 0.3.3 into /workspace/builds/worker-26/source
[INFO] validating manifest of crates.io crate trait_tests 0.3.3 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate trait_tests 0.3.3
[INFO] finished tweaking crates.io crate trait_tests 0.3.3
[INFO] tweaked toml for crates.io crate trait_tests 0.3.3 written to /workspace/builds/worker-26/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: library `trait_tests` should only specify `proc-macro = true` instead of setting `crate-type`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 982cbe51d217b11942255671bbd81a2e692a9d8b9a8c28bd5471b183d9b832d1
[INFO] running `Command { std: "docker" "start" "-a" "982cbe51d217b11942255671bbd81a2e692a9d8b9a8c28bd5471b183d9b832d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "982cbe51d217b11942255671bbd81a2e692a9d8b9a8c28bd5471b183d9b832d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "982cbe51d217b11942255671bbd81a2e692a9d8b9a8c28bd5471b183d9b832d1", kill_on_drop: false }`
[INFO] [stdout] 982cbe51d217b11942255671bbd81a2e692a9d8b9a8c28bd5471b183d9b832d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a34d30ef379353fbf17d045bd2588b161bb08cdfaa91c553b38c6b39daeed39
[INFO] running `Command { std: "docker" "start" "-a" "9a34d30ef379353fbf17d045bd2588b161bb08cdfaa91c553b38c6b39daeed39", kill_on_drop: false }`
[INFO] [stderr] warning: library `trait_tests` should only specify `proc-macro = true` instead of setting `crate-type`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.14.9
[INFO] [stderr]  Documenting trait_tests v0.3.3 (/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)] //proc_macro_lib
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[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 `trait_tests`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type proc-macro --crate-name trait_tests src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=a5bf3f0ae3b8fbcf -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-a022d4572177b1a5.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-e7b681e7b0e1f228.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-dcfe52de5a3f47e7.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.3.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "9a34d30ef379353fbf17d045bd2588b161bb08cdfaa91c553b38c6b39daeed39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a34d30ef379353fbf17d045bd2588b161bb08cdfaa91c553b38c6b39daeed39", kill_on_drop: false }`
[INFO] [stdout] 9a34d30ef379353fbf17d045bd2588b161bb08cdfaa91c553b38c6b39daeed39