[INFO] fetching crate futures-util-preview 0.3.0-alpha.19...
[INFO] documenting futures-util-preview-0.3.0-alpha.19 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate futures-util-preview 0.3.0-alpha.19 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate futures-util-preview 0.3.0-alpha.19 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 futures-util-preview 0.3.0-alpha.19
[INFO] finished tweaking crates.io crate futures-util-preview 0.3.0-alpha.19
[INFO] tweaked toml for crates.io crate futures-util-preview 0.3.0-alpha.19 written to /workspace/builds/worker-2/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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] be58ef81f0440e6d7b3a43e32165f9508af53209983b502d006778db07cfd126
[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" "be58ef81f0440e6d7b3a43e32165f9508af53209983b502d006778db07cfd126", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be58ef81f0440e6d7b3a43e32165f9508af53209983b502d006778db07cfd126", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be58ef81f0440e6d7b3a43e32165f9508af53209983b502d006778db07cfd126", kill_on_drop: false }`
[INFO] [stdout] be58ef81f0440e6d7b3a43e32165f9508af53209983b502d006778db07cfd126
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 0adcf05a28511723af2c7c5b6e5219a7201c635f0c279f9213b95170df6f5197
[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" "0adcf05a28511723af2c7c5b6e5219a7201c635f0c279f9213b95170df6f5197", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]  Documenting futures-util-preview v0.3.0-alpha.19 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `[select]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/try_future/mod.rs:173:16
[INFO] [stdout]     |
[INFO] [stdout] 173 |     /// using [`select!`] or [`join!`].
[INFO] [stdout]     |                ^^^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(intra_doc_link_resolution_failure)]` on by default
[INFO] [stdout]     = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `[join]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/try_future/mod.rs:173:31
[INFO] [stdout]     |
[INFO] [stdout] 173 |     /// using [`select!`] or [`join!`].
[INFO] [stdout]     |                               ^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `[select]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/try_future/mod.rs:220:26
[INFO] [stdout]     |
[INFO] [stdout] 220 |     /// type when using [`select!`] or [`join!`].
[INFO] [stdout]     |                          ^^^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `[join]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/try_future/mod.rs:220:41
[INFO] [stdout]     |
[INFO] [stdout] 220 |     /// type when using [`select!`] or [`join!`].
[INFO] [stdout]     |                                         ^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `[select]` cannot be resolved, ignoring it.
[INFO] [stdout]     --> src/stream/mod.rs:1154:14
[INFO] [stdout]      |
[INFO] [stdout] 1154 |     /// the [`select!`] macro.
[INFO] [stdout]      |              ^^^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]      |
[INFO] [stdout]      = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `[select]` cannot be resolved, ignoring it.
[INFO] [stdout]     --> src/stream/mod.rs:1158:10
[INFO] [stdout]      |
[INFO] [stdout] 1158 |     /// [`select!`] macro will prevent this.
[INFO] [stdout]      |          ^^^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]      |
[INFO] [stdout]      = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `[SpawnExt::spawn_with_handle]` cannot be resolved, ignoring it.
[INFO] [stdout]   --> src/task/spawn.rs:26:43
[INFO] [stdout]    |
[INFO] [stdout] 26 |     /// You can use [`spawn_with_handle`](SpawnExt::spawn_with_handle) if
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]    |
[INFO] [stdout]    = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `[SpawnExt::spawn_with_handle]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/task/spawn.rs:103:43
[INFO] [stdout]     |
[INFO] [stdout] 103 |     /// You can use [`spawn_with_handle`](SpawnExt::spawn_with_handle) if
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.77s
[INFO] running `Command { std: "docker" "inspect" "0adcf05a28511723af2c7c5b6e5219a7201c635f0c279f9213b95170df6f5197", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0adcf05a28511723af2c7c5b6e5219a7201c635f0c279f9213b95170df6f5197", kill_on_drop: false }`
[INFO] [stdout] 0adcf05a28511723af2c7c5b6e5219a7201c635f0c279f9213b95170df6f5197