[INFO] fetching crate dartlib 0.3.0...
[INFO] documenting dartlib-0.3.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate dartlib 0.3.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate dartlib 0.3.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dartlib 0.3.0
[INFO] finished tweaking crates.io crate dartlib 0.3.0
[INFO] tweaked toml for crates.io crate dartlib 0.3.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mach2 v0.4.2
[INFO] [stderr]   Downloaded bincode_derive v2.0.0-rc.3
[INFO] [stderr]   Downloaded stack-map v1.0.5
[INFO] [stderr]   Downloaded shared-local-state v0.1.4
[INFO] [stderr]   Downloaded concurrent-map v5.0.33
[INFO] [stderr]   Downloaded bytecount v0.6.7
[INFO] [stderr]   Downloaded triomphe v0.1.11
[INFO] [stderr]   Downloaded bincode v2.0.0-rc.3
[INFO] [stderr]   Downloaded moka v0.12.2
[INFO] [stderr]   Downloaded raw-cpuid v10.7.0
[INFO] [stderr]   Downloaded tagptr v0.2.0
[INFO] [stderr]   Downloaded quanta v0.11.1
[INFO] [stderr]   Downloaded skeptic v0.13.7
[INFO] [stderr]   Downloaded virtue v0.0.13
[INFO] [stderr]   Downloaded ebr v0.2.11
[INFO] [stderr]   Downloaded pagetable v0.4.5
[INFO] [stderr]   Downloaded marble v15.0.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 03ff5b5347e31dc739822a4a32590140974c28b0ee9b4b4f6c2b39971db4d6e3
[INFO] running `Command { std: "docker" "start" "-a" "03ff5b5347e31dc739822a4a32590140974c28b0ee9b4b4f6c2b39971db4d6e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03ff5b5347e31dc739822a4a32590140974c28b0ee9b4b4f6c2b39971db4d6e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03ff5b5347e31dc739822a4a32590140974c28b0ee9b4b4f6c2b39971db4d6e3", kill_on_drop: false }`
[INFO] [stdout] 03ff5b5347e31dc739822a4a32590140974c28b0ee9b4b4f6c2b39971db4d6e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c009af7497fd41994aa050efabf3d8074193869b943d8bff32f85228c247570
[INFO] running `Command { std: "docker" "start" "-a" "0c009af7497fd41994aa050efabf3d8074193869b943d8bff32f85228c247570", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling zstd-safe v5.0.2+zstd.1.5.2
[INFO] [stderr]     Checking crossbeam-epoch v0.9.17
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]     Checking shared-local-state v0.1.4
[INFO] [stderr]     Checking raw-cpuid v10.7.0
[INFO] [stderr]    Compiling virtue v0.0.13
[INFO] [stderr]    Compiling moka v0.12.2
[INFO] [stderr]     Checking stack-map v1.0.5
[INFO] [stderr]     Checking uuid v1.6.1
[INFO] [stderr]     Checking ebr v0.2.11
[INFO] [stderr]     Checking concurrent-map v5.0.33
[INFO] [stderr]     Checking tagptr v0.2.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.4
[INFO] [stderr]     Checking fault-injection v1.0.10
[INFO] [stderr]     Checking pagetable v0.4.5
[INFO] [stderr]     Checking triomphe v0.1.11
[INFO] [stderr]     Checking rayon-core v1.12.0
[INFO] [stderr]     Checking crossbeam v0.8.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking marble v15.0.7
[INFO] [stderr]    Compiling bincode_derive v2.0.0-rc.3
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking rayon v1.8.0
[INFO] [stderr]     Checking quanta v0.11.1
[INFO] [stderr]     Checking bincode v2.0.0-rc.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]  Documenting dartlib v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(portable_simd)]
[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 `dartlib`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name dartlib src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=b4cd8e9014541472 -L dependency=/opt/rustwide/target/debug/deps --extern bincode=/opt/rustwide/target/debug/deps/libbincode-61beac53176fc159.rmeta --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-7a1e6ce08b1f9163.rmeta --extern marble=/opt/rustwide/target/debug/deps/libmarble-44c22bfabbacb709.rmeta --extern moka=/opt/rustwide/target/debug/deps/libmoka-1a5b99dc9d9c61da.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-7c14306ccbf0b227.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-1e3ba34cc5e1f45f.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-cdbd51313957a31a.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-dc5a647ba6e06dd1.rmeta --cap-lints=warn --crate-version 0.3.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "0c009af7497fd41994aa050efabf3d8074193869b943d8bff32f85228c247570", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c009af7497fd41994aa050efabf3d8074193869b943d8bff32f85228c247570", kill_on_drop: false }`
[INFO] [stdout] 0c009af7497fd41994aa050efabf3d8074193869b943d8bff32f85228c247570
