[INFO] fetching crate prometheus-client 0.16.0...
[INFO] documenting prometheus-client-0.16.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate prometheus-client 0.16.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate prometheus-client 0.16.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prometheus-client 0.16.0
[INFO] finished tweaking crates.io crate prometheus-client 0.16.0
[INFO] tweaked toml for crates.io crate prometheus-client 0.16.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate prometheus-client 0.16.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-dup v1.2.2
[INFO] [stderr]   Downloaded async-h1 v2.3.2
[INFO] [stderr]   Downloaded unindent v0.1.8
[INFO] [stderr]   Downloaded pyo3 v0.16.2
[INFO] [stderr]   Downloaded memoffset v0.6.3
[INFO] [stderr]   Downloaded prometheus-client-derive-text-encode v0.2.0
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.16.2
[INFO] [stderr]   Downloaded simple-mutex v1.1.5
[INFO] [stderr]   Downloaded vec-arena v1.1.0
[INFO] [stderr]   Downloaded indoc v1.0.4
[INFO] [stderr]   Downloaded crossbeam-queue v0.3.1
[INFO] [stderr]   Downloaded pyo3-macros v0.16.2
[INFO] [stderr]   Downloaded plotters-backend v0.3.0
[INFO] [stderr]   Downloaded sval v1.0.0-alpha.5
[INFO] [stderr]   Downloaded tide v0.16.0
[INFO] [stderr]   Downloaded route-recognizer v0.2.0
[INFO] [stderr]   Downloaded plotters-svg v0.3.0
[INFO] [stderr]   Downloaded pyo3-build-config v0.16.2
[INFO] [stderr]   Downloaded byte-pool v0.2.3
[INFO] [stderr]   Downloaded femme v2.1.1
[INFO] [stderr]   Downloaded async-session v2.0.1
[INFO] [stderr]   Downloaded httparse v1.3.6
[INFO] [stderr]   Downloaded async-sse v4.1.0
[INFO] [stderr]   Downloaded sha2 v0.9.3
[INFO] [stderr]   Downloaded nb-connect v1.1.0
[INFO] [stderr]   Downloaded plotters v0.3.0
[INFO] [stderr]   Downloaded http-types v2.10.0
[INFO] [stderr]   Downloaded http-client v6.3.5
[INFO] [stderr]   Downloaded const_fn v0.4.6
[INFO] [stderr]   Downloaded pyo3-ffi v0.16.2
[INFO] [stderr]   Downloaded serde_qs v0.7.2
[INFO] [stderr]   Downloaded dtoa v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 60cbe8581599a57c699a2baa1aaa0ea933a28246034dfe93368b7cb4f90a725b
[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" "60cbe8581599a57c699a2baa1aaa0ea933a28246034dfe93368b7cb4f90a725b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60cbe8581599a57c699a2baa1aaa0ea933a28246034dfe93368b7cb4f90a725b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60cbe8581599a57c699a2baa1aaa0ea933a28246034dfe93368b7cb4f90a725b", kill_on_drop: false }`
[INFO] [stdout] 60cbe8581599a57c699a2baa1aaa0ea933a28246034dfe93368b7cb4f90a725b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "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] fac497f7cea6f3528ceb86007cab6b450579358cfabb42ce24a2ac702bcd9198
[INFO] running `Command { std: "docker" "start" "-a" "fac497f7cea6f3528ceb86007cab6b450579358cfabb42ce24a2ac702bcd9198", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking dtoa v1.0.1
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling prometheus-client-derive-text-encode v0.2.0
[INFO] [stderr]  Documenting prometheus-client v0.16.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.52s
[INFO] running `Command { std: "docker" "inspect" "fac497f7cea6f3528ceb86007cab6b450579358cfabb42ce24a2ac702bcd9198", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fac497f7cea6f3528ceb86007cab6b450579358cfabb42ce24a2ac702bcd9198", kill_on_drop: false }`
[INFO] [stdout] fac497f7cea6f3528ceb86007cab6b450579358cfabb42ce24a2ac702bcd9198
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "RUSTFLAGS=--cap-lints=warn" "-e" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", 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] f6120ebe996f07c3df89fd3437ef8e05389b94553a79355823f4c8d71aaf14ce
[INFO] running `Command { std: "docker" "start" "-a" "f6120ebe996f07c3df89fd3437ef8e05389b94553a79355823f4c8d71aaf14ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking dtoa v1.0.1
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling prometheus-client-derive-text-encode v0.2.0
[INFO] [stderr]  Documenting prometheus-client v0.16.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.13s
[INFO] running `Command { std: "docker" "inspect" "f6120ebe996f07c3df89fd3437ef8e05389b94553a79355823f4c8d71aaf14ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6120ebe996f07c3df89fd3437ef8e05389b94553a79355823f4c8d71aaf14ce", kill_on_drop: false }`
[INFO] [stdout] f6120ebe996f07c3df89fd3437ef8e05389b94553a79355823f4c8d71aaf14ce