[INFO] fetching crate mochi-rs 0.0.2...
[INFO] documenting mochi-rs-0.0.2 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate mochi-rs 0.0.2 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate mochi-rs 0.0.2 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 mochi-rs 0.0.2
[INFO] finished tweaking crates.io crate mochi-rs 0.0.2
[INFO] tweaked toml for crates.io crate mochi-rs 0.0.2 written to /workspace/builds/worker-1-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 mochi-bind v0.0.1
[INFO] [stderr]   Downloaded dlmalloc v0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 5a9c0fc8ee04e824691e8c3ddb3d2f315c7cb46b9fd6b773860afa09ae242426
[INFO] running `Command { std: "docker" "start" "-a" "5a9c0fc8ee04e824691e8c3ddb3d2f315c7cb46b9fd6b773860afa09ae242426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a9c0fc8ee04e824691e8c3ddb3d2f315c7cb46b9fd6b773860afa09ae242426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a9c0fc8ee04e824691e8c3ddb3d2f315c7cb46b9fd6b773860afa09ae242426", kill_on_drop: false }`
[INFO] [stdout] 5a9c0fc8ee04e824691e8c3ddb3d2f315c7cb46b9fd6b773860afa09ae242426
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] d715f39282560f0a458be1247c017d7a797f3bb4310918d066c000441b071e5a
[INFO] running `Command { std: "docker" "start" "-a" "d715f39282560f0a458be1247c017d7a797f3bb4310918d066c000441b071e5a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling dlmalloc v0.2.4
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling mochi-bind v0.0.1
[INFO] [stderr]  Documenting mochi-rs v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | / #![feature(
[INFO] [stdout] 3 | |     core_intrinsics,
[INFO] [stdout] 4 | |     alloc_error_handler,
[INFO] [stdout] 5 | |     fmt_internals,
[INFO] [stdout] 6 | |     panic_info_message
[INFO] [stdout] 7 | | )]
[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 `mochi-rs`
[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 mochi_rs src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="dlmalloc"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=d045bfd08dfbf5a3 -L dependency=/opt/rustwide/target/debug/deps --extern dlmalloc=/opt/rustwide/target/debug/deps/libdlmalloc-a1dac1819700da03.rmeta --extern mochi_bind=/opt/rustwide/target/debug/deps/libmochi_bind-aa877df30bf83ff5.so --cap-lints=warn --crate-version 0.0.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d715f39282560f0a458be1247c017d7a797f3bb4310918d066c000441b071e5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d715f39282560f0a458be1247c017d7a797f3bb4310918d066c000441b071e5a", kill_on_drop: false }`
[INFO] [stdout] d715f39282560f0a458be1247c017d7a797f3bb4310918d066c000441b071e5a
