[INFO] crate tracing 0.1.15 is already in cache
[INFO] documenting tracing-0.1.15 against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] extracting crate tracing 0.1.15 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate tracing 0.1.15 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 tracing 0.1.15
[INFO] finished tweaking crates.io crate tracing 0.1.15
[INFO] tweaked toml for crates.io crate tracing 0.1.15 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "fetch" "--locked" "--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" "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] [stdout] 6cbcf12681d6ad095427ca423c1aa222b68302636e32427d2614981a10e0d4c7
[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" "6cbcf12681d6ad095427ca423c1aa222b68302636e32427d2614981a10e0d4c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cbcf12681d6ad095427ca423c1aa222b68302636e32427d2614981a10e0d4c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cbcf12681d6ad095427ca423c1aa222b68302636e32427d2614981a10e0d4c7", kill_on_drop: false }`
[INFO] [stdout] 6cbcf12681d6ad095427ca423c1aa222b68302636e32427d2614981a10e0d4c7
[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" "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] 288484ee2070bb2740911ca293e047b4ec8d381cffe655b6392fd0a498eca6cf
[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" "288484ee2070bb2740911ca293e047b4ec8d381cffe655b6392fd0a498eca6cf", kill_on_drop: false }`
[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]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling tracing-attributes v0.1.8
[INFO] [stderr]  Documenting tracing v0.1.15 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `[spans]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/lib.rs:601:12
[INFO] [stdout]     |
[INFO] [stdout] 601 | //! cause [spans] and [events] to emit `log` records. When the "log" feature is
[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: `[events]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/lib.rs:601:24
[INFO] [stdout]     |
[INFO] [stdout] 601 | //! cause [spans] and [events] to emit `log` records. When the "log" feature is
[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: `[events]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/lib.rs:632:21
[INFO] [stdout]     |
[INFO] [stdout] 632 | //! were `tracing` [events]. This allows applications using `tracing` to record
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.24s
[INFO] running `Command { std: "docker" "inspect" "288484ee2070bb2740911ca293e047b4ec8d381cffe655b6392fd0a498eca6cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "288484ee2070bb2740911ca293e047b4ec8d381cffe655b6392fd0a498eca6cf", kill_on_drop: false }`
[INFO] [stdout] 288484ee2070bb2740911ca293e047b4ec8d381cffe655b6392fd0a498eca6cf