[INFO] fetching crate bitwise 0.1.1...
[INFO] documenting bitwise-0.1.1 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate bitwise 0.1.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate bitwise 0.1.1 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bitwise 0.1.1
[INFO] finished tweaking crates.io crate bitwise 0.1.1
[INFO] tweaked toml for crates.io crate bitwise 0.1.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `bench` profile
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3af26e90b66c3eaecf17a51355f5bd3ef78cef113ca61dd2ea295c7ab617b96d
[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" "3af26e90b66c3eaecf17a51355f5bd3ef78cef113ca61dd2ea295c7ab617b96d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3af26e90b66c3eaecf17a51355f5bd3ef78cef113ca61dd2ea295c7ab617b96d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3af26e90b66c3eaecf17a51355f5bd3ef78cef113ca61dd2ea295c7ab617b96d", kill_on_drop: false }`
[INFO] [stdout] 3af26e90b66c3eaecf17a51355f5bd3ef78cef113ca61dd2ea295c7ab617b96d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fc40567c3f6ce6ad62bbd538920b4ccf02361c9002667748267401257837043
[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" "5fc40567c3f6ce6ad62bbd538920b4ccf02361c9002667748267401257837043", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `bench` profile
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling bitintr v0.1.18
[INFO] [stderr]    Compiling bitwise v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting bitwise v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: specialization is unstable
[INFO] [stdout]   --> src/word/to_word.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 | /     default fn from(x: T) -> Self {
[INFO] [stdout] 59 | |         ToWord::to(x)
[INFO] [stdout] 60 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `bitwise`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name bitwise 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 --extern bitintr=/opt/rustwide/target/debug/deps/libbitintr-e724d1cf1046267d.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "5fc40567c3f6ce6ad62bbd538920b4ccf02361c9002667748267401257837043", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fc40567c3f6ce6ad62bbd538920b4ccf02361c9002667748267401257837043", kill_on_drop: false }`
[INFO] [stdout] 5fc40567c3f6ce6ad62bbd538920b4ccf02361c9002667748267401257837043