[INFO] fetching crate guppy 0.5.0...
[INFO] documenting guppy-0.5.0 against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] extracting crate guppy 0.5.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate guppy 0.5.0 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 guppy 0.5.0
[INFO] finished tweaking crates.io crate guppy 0.5.0
[INFO] tweaked toml for crates.io crate guppy 0.5.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate guppy 0.5.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded guppy-summaries v0.2.0
[INFO] [stderr]   Downloaded target-spec v0.4.0
[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] 3af6d0801d2ad1a54c77e6bd040f5eb25c8128e3a4b2ded2b1b1d92aec4942db
[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" "3af6d0801d2ad1a54c77e6bd040f5eb25c8128e3a4b2ded2b1b1d92aec4942db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3af6d0801d2ad1a54c77e6bd040f5eb25c8128e3a4b2ded2b1b1d92aec4942db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3af6d0801d2ad1a54c77e6bd040f5eb25c8128e3a4b2ded2b1b1d92aec4942db", kill_on_drop: false }`
[INFO] [stdout] 3af6d0801d2ad1a54c77e6bd040f5eb25c8128e3a4b2ded2b1b1d92aec4942db
[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] d74e28fc561f12da89cbb1e1cebabe58e66930c2f8f3bd4e83c93cab942d4692
[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" "d74e28fc561f12da89cbb1e1cebabe58e66930c2f8f3bd4e83c93cab942d4692", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_derive v1.0.113
[INFO] [stderr]    Compiling serde v1.0.113
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling target-spec v0.4.0
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking supercow v0.1.0
[INFO] [stderr]     Checking pathdiff v0.2.0
[INFO] [stderr]     Checking nested v0.1.1
[INFO] [stderr]     Checking cfg-expr v0.4.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling indexmap v1.4.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]     Checking serde_json v1.0.55
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking cargo_metadata v0.10.0
[INFO] [stderr]  Documenting guppy v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `[target]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/graph/build.rs:660:45
[INFO] [stdout]     |
[INFO] [stdout] 660 | /// platform-specific dependencies and the [target] section. For example:
[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 46.38s
[INFO] running `Command { std: "docker" "inspect" "d74e28fc561f12da89cbb1e1cebabe58e66930c2f8f3bd4e83c93cab942d4692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d74e28fc561f12da89cbb1e1cebabe58e66930c2f8f3bd4e83c93cab942d4692", kill_on_drop: false }`
[INFO] [stdout] d74e28fc561f12da89cbb1e1cebabe58e66930c2f8f3bd4e83c93cab942d4692