[INFO] fetching crate katexit-example-nightly 0.1.4...
[INFO] documenting katexit-example-nightly-0.1.4 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate katexit-example-nightly 0.1.4 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate katexit-example-nightly 0.1.4 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 katexit-example-nightly 0.1.4
[INFO] finished tweaking crates.io crate katexit-example-nightly 0.1.4
[INFO] tweaked toml for crates.io crate katexit-example-nightly 0.1.4 written to /workspace/builds/worker-2-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] dadee4d70685769f8317ed72bcd0f55a89cc4d79593d9807790aded4ee1cd3d9
[INFO] running `Command { std: "docker" "start" "-a" "dadee4d70685769f8317ed72bcd0f55a89cc4d79593d9807790aded4ee1cd3d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dadee4d70685769f8317ed72bcd0f55a89cc4d79593d9807790aded4ee1cd3d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dadee4d70685769f8317ed72bcd0f55a89cc4d79593d9807790aded4ee1cd3d9", kill_on_drop: false }`
[INFO] [stdout] dadee4d70685769f8317ed72bcd0f55a89cc4d79593d9807790aded4ee1cd3d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 2ab855837b0012e5f2f240fbce84d1a341d35f2f1b398e69d9a7e5f613c79d8d
[INFO] running `Command { std: "docker" "start" "-a" "2ab855837b0012e5f2f240fbce84d1a341d35f2f1b398e69d9a7e5f613c79d8d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling katexit v0.1.4
[INFO] [stderr]  Documenting katexit-example-nightly v0.1.4 (/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(prelude_import, custom_inner_attributes)]
[INFO] [stdout] 2  | | #![cfg_attr(doc, katexit::katexit)]
[INFO] [stdout] 3  | | //! Module level document example with $\KaTeX$!
[INFO] [stdout] 4  | | //!
[INFO] [stdout] ...  |
[INFO] [stdout] 16 | | /// $$
[INFO] [stdout] 17 | | pub fn my_func() {}
[INFO] [stdout]    | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `prelude_import` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(prelude_import, custom_inner_attributes)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `katexit-example-nightly`
[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=2018 --crate-type lib --crate-name katexit_example_nightly src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=bf6554332c6c645d -L dependency=/opt/rustwide/target/debug/deps --extern katexit=/opt/rustwide/target/debug/deps/libkatexit-d3c41190ec83ece2.so --cap-lints=warn --crate-version 0.1.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2ab855837b0012e5f2f240fbce84d1a341d35f2f1b398e69d9a7e5f613c79d8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ab855837b0012e5f2f240fbce84d1a341d35f2f1b398e69d9a7e5f613c79d8d", kill_on_drop: false }`
[INFO] [stdout] 2ab855837b0012e5f2f240fbce84d1a341d35f2f1b398e69d9a7e5f613c79d8d
