[INFO] fetching crate word_count 0.1.0...
[INFO] documenting word_count-0.1.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate word_count 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate word_count 0.1.0 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 word_count 0.1.0
[INFO] finished tweaking crates.io crate word_count 0.1.0
[INFO] tweaked toml for crates.io crate word_count 0.1.0 written to /workspace/builds/worker-4-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] 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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 1916010d181f1a109e0f0618cfded9e9dd2c6cc9d8fe67a1fb92f2cfb62aad97
[INFO] running `Command { std: "docker" "start" "-a" "1916010d181f1a109e0f0618cfded9e9dd2c6cc9d8fe67a1fb92f2cfb62aad97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1916010d181f1a109e0f0618cfded9e9dd2c6cc9d8fe67a1fb92f2cfb62aad97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1916010d181f1a109e0f0618cfded9e9dd2c6cc9d8fe67a1fb92f2cfb62aad97", kill_on_drop: false }`
[INFO] [stdout] 1916010d181f1a109e0f0618cfded9e9dd2c6cc9d8fe67a1fb92f2cfb62aad97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 5759224cadd83a9fb5cd4843a2e95ed48d6d3d68a86096979c297245fe9c9e3d
[INFO] running `Command { std: "docker" "start" "-a" "5759224cadd83a9fb5cd4843a2e95ed48d6d3d68a86096979c297245fe9c9e3d", kill_on_drop: false }`
[INFO] [stderr]  Documenting word_count v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking word_count v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> src/pivot_sort.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> src/pivot_sort.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> src/pivot_sort.rs:91:1
[INFO] [stdout]    |
[INFO] [stdout] 91 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> src/pivot_sort.rs:91:1
[INFO] [stdout]    |
[INFO] [stdout] 91 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]  --> src/pivot_sort.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![stable]
[INFO] [stdout]   | ^^^^^^^^^^ help: must be of the form: `#![stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]  --> src/pivot_sort.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![stable]
[INFO] [stdout]   | ^^^^^^^^^^ help: must be of the form: `#![stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> src/word_index.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> src/word_index.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> src/word_index.rs:68:1
[INFO] [stdout]    |
[INFO] [stdout] 68 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> src/word_index.rs:68:1
[INFO] [stdout]    |
[INFO] [stdout] 68 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]  --> src/word_index.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![stable]
[INFO] [stdout]   | ^^^^^^^^^^ help: must be of the form: `#![stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> src/lib.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]  --> src/word_index.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![stable]
[INFO] [stdout]   | ^^^^^^^^^^ help: must be of the form: `#![stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![unstable]
[INFO] [stdout]   | ^^^^^^^^^^^^ help: must be of the form: `#![unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> src/lib.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![unstable]
[INFO] [stdout]   | ^^^^^^^^^^^^ help: must be of the form: `#![unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/pivot_sort.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     #[stable]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/pivot_sort.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/pivot_sort.rs:91:1
[INFO] [stdout]    |
[INFO] [stdout] 91 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]  --> src/pivot_sort.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![stable]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/word_index.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/word_index.rs:68:1
[INFO] [stdout]    |
[INFO] [stdout] 68 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]  --> src/word_index.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![stable]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/lib.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![unstable]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/pivot_sort.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     #[stable]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/pivot_sort.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/pivot_sort.rs:91:1
[INFO] [stdout]    |
[INFO] [stdout] 91 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]  --> src/pivot_sort.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![stable]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/word_index.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/word_index.rs:68:1
[INFO] [stdout]    |
[INFO] [stdout] 68 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]  --> src/word_index.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![stable]
[INFO] [stdout]   | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/lib.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![unstable]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(collections)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `collections`
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(collections)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 17 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0734`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 19 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635, E0734.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `word_count`
[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 --crate-type lib --crate-name lib_word_count src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=21b24e42e014ec26 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `word_count` (lib) due to 20 previous errors
[INFO] running `Command { std: "docker" "inspect" "5759224cadd83a9fb5cd4843a2e95ed48d6d3d68a86096979c297245fe9c9e3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5759224cadd83a9fb5cd4843a2e95ed48d6d3d68a86096979c297245fe9c9e3d", kill_on_drop: false }`
[INFO] [stdout] 5759224cadd83a9fb5cd4843a2e95ed48d6d3d68a86096979c297245fe9c9e3d
