[INFO] fetching crate metrics-core 0.5.2...
[INFO] documenting metrics-core-0.5.2 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate metrics-core 0.5.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate metrics-core 0.5.2 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 metrics-core 0.5.2
[INFO] finished tweaking crates.io crate metrics-core 0.5.2
[INFO] tweaked toml for crates.io crate metrics-core 0.5.2 written to /workspace/builds/worker-0/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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] f58b58b273a1133518e8399e0b06b1ea71467e115d6b0d3dac1808bb8ebf878c
[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" "f58b58b273a1133518e8399e0b06b1ea71467e115d6b0d3dac1808bb8ebf878c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f58b58b273a1133518e8399e0b06b1ea71467e115d6b0d3dac1808bb8ebf878c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f58b58b273a1133518e8399e0b06b1ea71467e115d6b0d3dac1808bb8ebf878c", kill_on_drop: false }`
[INFO] [stdout] f58b58b273a1133518e8399e0b06b1ea71467e115d6b0d3dac1808bb8ebf878c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 79b9ea5ace9c511fd745e38ac293a5212b10b394b415371f0de06b343af1113d
[INFO] running `Command { std: "docker" "start" "-a" "79b9ea5ace9c511fd745e38ac293a5212b10b394b415371f0de06b343af1113d", kill_on_drop: false }`
[INFO] [stderr]  Documenting metrics-core v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `[metrics_core::IntoLabels]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/lib.rs:318:57
[INFO] [stdout]     |
[INFO] [stdout] 318 | /// to do the exact same thing in calls that depend on [`metrics_core::IntoLabels`].
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `Command { std: "docker" "inspect" "79b9ea5ace9c511fd745e38ac293a5212b10b394b415371f0de06b343af1113d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79b9ea5ace9c511fd745e38ac293a5212b10b394b415371f0de06b343af1113d", kill_on_drop: false }`
[INFO] [stdout] 79b9ea5ace9c511fd745e38ac293a5212b10b394b415371f0de06b343af1113d