[INFO] crate word_count 0.1.0 is already in cache
[INFO] documenting word_count-0.1.0 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate word_count 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate word_count 0.1.0 on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", 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-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4822d78a03dbeb1e3b0e6159bd25dafb71d5df7b03accb5549bca51ada92509
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e4822d78a03dbeb1e3b0e6159bd25dafb71d5df7b03accb5549bca51ada92509", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4822d78a03dbeb1e3b0e6159bd25dafb71d5df7b03accb5549bca51ada92509", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4822d78a03dbeb1e3b0e6159bd25dafb71d5df7b03accb5549bca51ada92509", kill_on_drop: false }`
[INFO] [stdout] e4822d78a03dbeb1e3b0e6159bd25dafb71d5df7b03accb5549bca51ada92509
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e3b8bc9efdf645ae670c0f67ee54264c3cc8182d43bd797495155adb94572c4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3e3b8bc9efdf645ae670c0f67ee54264c3cc8182d43bd797495155adb94572c4", kill_on_drop: false }`
[INFO] [stderr]     Checking word_count v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting word_count v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> src/pivot_sort.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     #[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: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: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 `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/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: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/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: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: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/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/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/lib.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> src/pivot_sort.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     #[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: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: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 `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: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 10 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `word_count`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name lib_word_count src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --cap-lints=forbid` (exit code: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 18 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0734`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3e3b8bc9efdf645ae670c0f67ee54264c3cc8182d43bd797495155adb94572c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e3b8bc9efdf645ae670c0f67ee54264c3cc8182d43bd797495155adb94572c4", kill_on_drop: false }`
[INFO] [stdout] 3e3b8bc9efdf645ae670c0f67ee54264c3cc8182d43bd797495155adb94572c4