[INFO] fetching crate metrics 0.13.0-alpha.1...
[INFO] documenting metrics-0.13.0-alpha.1 against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] extracting crate metrics 0.13.0-alpha.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate metrics 0.13.0-alpha.1 on toolchain 66dfc4e010913fbed0c4ea91fc2c010004b0f441
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate metrics 0.13.0-alpha.1
[INFO] finished tweaking crates.io crate metrics 0.13.0-alpha.1
[INFO] tweaked toml for crates.io crate metrics 0.13.0-alpha.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate metrics 0.13.0-alpha.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "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" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "metadata" "--no-deps" "--format-version=1", 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] 443fba376def8d4d7bb097263d57ad1ae14f5716dbeca74e22a7c3972edf1c66
[INFO] running `Command { std: "docker" "start" "-a" "443fba376def8d4d7bb097263d57ad1ae14f5716dbeca74e22a7c3972edf1c66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "443fba376def8d4d7bb097263d57ad1ae14f5716dbeca74e22a7c3972edf1c66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "443fba376def8d4d7bb097263d57ad1ae14f5716dbeca74e22a7c3972edf1c66", kill_on_drop: false }`
[INFO] [stdout] 443fba376def8d4d7bb097263d57ad1ae14f5716dbeca74e22a7c3972edf1c66
[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" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98a4cad6818f9395ba83dbe9c729c0160dd51342c21819d158d5b01d21acd06b
[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" "98a4cad6818f9395ba83dbe9c729c0160dd51342c21819d158d5b01d21acd06b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]    Compiling metrics v0.13.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling metrics-macros v0.1.0-alpha.1
[INFO] [stderr]  Documenting metrics v0.13.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `[IntoU64]` cannot be resolved, ignoring it.
[INFO] [stdout]   --> src/recorder.rs:46:49
[INFO] [stdout]    |
[INFO] [stdout] 46 |     /// The value can be value that implements [`IntoU64`].  By default, `metrics` provides an
[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: `[IntoU64]` cannot be resolved, ignoring it.
[INFO] [stdout]   --> src/recorder.rs:46:49
[INFO] [stdout]    |
[INFO] [stdout] 46 |     /// The value can be value that implements [`IntoU64`].  By default, `metrics` provides an
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.22s
[INFO] running `Command { std: "docker" "inspect" "98a4cad6818f9395ba83dbe9c729c0160dd51342c21819d158d5b01d21acd06b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98a4cad6818f9395ba83dbe9c729c0160dd51342c21819d158d5b01d21acd06b", kill_on_drop: false }`
[INFO] [stdout] 98a4cad6818f9395ba83dbe9c729c0160dd51342c21819d158d5b01d21acd06b