[INFO] fetching crate tracing-callgraph 0.1.0-alpha.1...
[INFO] documenting tracing-callgraph-0.1.0-alpha.1 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate tracing-callgraph 0.1.0-alpha.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate tracing-callgraph 0.1.0-alpha.1 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tracing-callgraph 0.1.0-alpha.1
[INFO] finished tweaking crates.io crate tracing-callgraph 0.1.0-alpha.1
[INFO] tweaked toml for crates.io crate tracing-callgraph 0.1.0-alpha.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate tracing-callgraph 0.1.0-alpha.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a816fae6da4f0c97bf50369071721a85f46d397f3513a089555fc114c1d78bd9
[INFO] running `Command { std: "docker" "start" "-a" "a816fae6da4f0c97bf50369071721a85f46d397f3513a089555fc114c1d78bd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a816fae6da4f0c97bf50369071721a85f46d397f3513a089555fc114c1d78bd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a816fae6da4f0c97bf50369071721a85f46d397f3513a089555fc114c1d78bd9", kill_on_drop: false }`
[INFO] [stdout] a816fae6da4f0c97bf50369071721a85f46d397f3513a089555fc114c1d78bd9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7181e7759574f2102f5d6c44f7f1f74e7b4f846cc9c2571568adc266fbe4c27e
[INFO] running `Command { std: "docker" "start" "-a" "7181e7759574f2102f5d6c44f7f1f74e7b4f846cc9c2571568adc266fbe4c27e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling syn v1.0.34
[INFO] [stderr]     Checking smallvec v1.4.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking tracing-core v0.1.12
[INFO] [stderr]     Checking sharded-slab v0.0.9
[INFO] [stderr]    Compiling hashbrown v0.8.1
[INFO] [stderr]    Compiling indexmap v1.5.0
[INFO] [stderr]     Checking tracing-subscriber v0.2.10
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.9
[INFO] [stderr]     Checking tracing v0.1.18
[INFO] [stderr]  Documenting tracing-callgraph v0.1.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unresolved link to `flush_on_drop`
[INFO] [stdout]   --> src/lib.rs:90:11
[INFO] [stdout]    |
[INFO] [stdout] 90 | /// the [`flush_on_drop`] function, which returns a [`FlushGuard`]. The [`FlushGuard`]
[INFO] [stdout]    |           ^^^^^^^^^^^^^ no item named `flush_on_drop` in scope
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout]    = help: to escape `[` and `]` characters, 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 10.05s
[INFO] running `Command { std: "docker" "inspect" "7181e7759574f2102f5d6c44f7f1f74e7b4f846cc9c2571568adc266fbe4c27e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7181e7759574f2102f5d6c44f7f1f74e7b4f846cc9c2571568adc266fbe4c27e", kill_on_drop: false }`
[INFO] [stdout] 7181e7759574f2102f5d6c44f7f1f74e7b4f846cc9c2571568adc266fbe4c27e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2022-05-20" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] bde02ca77b7a6576009b4a968e58915bd71c572e18c8917cfc67f7308d4df919
[INFO] running `Command { std: "docker" "start" "-a" "bde02ca77b7a6576009b4a968e58915bd71c572e18c8917cfc67f7308d4df919", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.34
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking smallvec v1.4.1
[INFO] [stderr]     Checking tracing-core v0.1.12
[INFO] [stderr]     Checking sharded-slab v0.0.9
[INFO] [stderr]    Compiling hashbrown v0.8.1
[INFO] [stderr]    Compiling indexmap v1.5.0
[INFO] [stderr]     Checking tracing-subscriber v0.2.10
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.9
[INFO] [stderr]     Checking tracing v0.1.18
[INFO] [stderr]  Documenting tracing-callgraph v0.1.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unresolved link to `flush_on_drop`
[INFO] [stdout]   --> src/lib.rs:90:11
[INFO] [stdout]    |
[INFO] [stdout] 90 | /// the [`flush_on_drop`] function, which returns a [`FlushGuard`]. The [`FlushGuard`]
[INFO] [stdout]    |           ^^^^^^^^^^^^^ no item named `flush_on_drop` in scope
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout]    = help: to escape `[` and `]` characters, 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 13.23s
[INFO] running `Command { std: "docker" "inspect" "bde02ca77b7a6576009b4a968e58915bd71c572e18c8917cfc67f7308d4df919", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bde02ca77b7a6576009b4a968e58915bd71c572e18c8917cfc67f7308d4df919", kill_on_drop: false }`
[INFO] [stdout] bde02ca77b7a6576009b4a968e58915bd71c572e18c8917cfc67f7308d4df919