[INFO] fetching crate iso-macro 0.0.5...
[INFO] documenting iso-macro-0.0.5 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate iso-macro 0.0.5 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate iso-macro 0.0.5 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "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-tc1/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" "+1.69.0" "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" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae7ce42d9ae513f553e66e1a37383055e8633bdf3ef5a3c38b9fb3b7318beb57
[INFO] running `Command { std: "docker" "start" "-a" "ae7ce42d9ae513f553e66e1a37383055e8633bdf3ef5a3c38b9fb3b7318beb57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae7ce42d9ae513f553e66e1a37383055e8633bdf3ef5a3c38b9fb3b7318beb57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae7ce42d9ae513f553e66e1a37383055e8633bdf3ef5a3c38b9fb3b7318beb57", kill_on_drop: false }`
[INFO] [stdout] ae7ce42d9ae513f553e66e1a37383055e8633bdf3ef5a3c38b9fb3b7318beb57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f0f428d5440419cb28bc08e88c85e7097b060845e16d45e79c883710dafc4b1
[INFO] running `Command { std: "docker" "start" "-a" "8f0f428d5440419cb28bc08e88c85e7097b060845e16d45e79c883710dafc4b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]  Documenting iso-macro v0.0.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable 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=7573f139ddd4d99d -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-b4428f0723261f03.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-25938768891e3290.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-df83aed7d634f5dc.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-dff66230d72054e2.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-28dab75f1d9d1082.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.0.5` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8f0f428d5440419cb28bc08e88c85e7097b060845e16d45e79c883710dafc4b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f0f428d5440419cb28bc08e88c85e7097b060845e16d45e79c883710dafc4b1", kill_on_drop: false }`
[INFO] [stdout] 8f0f428d5440419cb28bc08e88c85e7097b060845e16d45e79c883710dafc4b1
