[INFO] fetching crate d4-hts 0.3.7...
[INFO] documenting d4-hts-0.3.7 against try#6ee483316d2e4581572121d60a955affb2032eb3+cargoflags=-Zrustdoc-scrape-examples for scrape-examples
[INFO] extracting crate d4-hts 0.3.7 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate d4-hts 0.3.7 on toolchain 6ee483316d2e4581572121d60a955affb2032eb3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate d4-hts 0.3.7
[INFO] finished tweaking crates.io crate d4-hts 0.3.7
[INFO] tweaked toml for crates.io crate d4-hts 0.3.7 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c834359121d098253a42ea87420646ea09ccc003a5891ad4ecaced45438ddbd2
[INFO] running `Command { std: "docker" "start" "-a" "c834359121d098253a42ea87420646ea09ccc003a5891ad4ecaced45438ddbd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c834359121d098253a42ea87420646ea09ccc003a5891ad4ecaced45438ddbd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c834359121d098253a42ea87420646ea09ccc003a5891ad4ecaced45438ddbd2", kill_on_drop: false }`
[INFO] [stdout] c834359121d098253a42ea87420646ea09ccc003a5891ad4ecaced45438ddbd2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json" "-Zrustdoc-scrape-examples", kill_on_drop: false }`
[INFO] [stdout] 5c262c90c164ba28b4bbbe418cc5e90fc186138eed72786948c4fb0e34682f59
[INFO] running `Command { std: "docker" "start" "-a" "5c262c90c164ba28b4bbbe418cc5e90fc186138eed72786948c4fb0e34682f59", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling bindgen v0.55.1
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling clang-sys v1.4.0
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling regex v1.7.0
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling d4-hts v0.3.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Scraping d4-hts v0.3.7 (/opt/rustwide/workdir)
[INFO] [stderr] warning: failed to scan lib in package `d4-hts` for example code usage
[INFO] [stderr]     Try running with `--verbose` to see the error message.
[INFO] [stderr]     If an example or library should not be scanned, then consider adding `doc-scrape-examples = false` to its `[[example]]` or `[lib]` definition in Cargo.toml
[INFO] [stderr] warning: `d4-hts` (lib) generated 1 warning
[INFO] [stderr]  Documenting d4-hts v0.3.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.77s
[INFO] running `Command { std: "docker" "inspect" "5c262c90c164ba28b4bbbe418cc5e90fc186138eed72786948c4fb0e34682f59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c262c90c164ba28b4bbbe418cc5e90fc186138eed72786948c4fb0e34682f59", kill_on_drop: false }`
[INFO] [stdout] 5c262c90c164ba28b4bbbe418cc5e90fc186138eed72786948c4fb0e34682f59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "RUSTC_BOOTSTRAP=1" "-e" "DOCS_RS=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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "rustdoc" "--lib" "-Zrustdoc-map" "-Z" "unstable-options" "--config" "build.rustdocflags=[\"-Z\", \"unstable-options\", \"--document-private-items\"]" "--frozen" "--message-format=json" "-Zrustdoc-scrape-examples", kill_on_drop: false }`
[INFO] [stdout] 816c1e3a3428cce511e46b193b8b2742587da6d084e3fd56506051d40a3d7932
[INFO] running `Command { std: "docker" "start" "-a" "816c1e3a3428cce511e46b193b8b2742587da6d084e3fd56506051d40a3d7932", kill_on_drop: false }`
[INFO] [stderr]    Compiling d4-hts v0.3.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Scraping d4-hts v0.3.7 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting d4-hts v0.3.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `Command { std: "docker" "inspect" "816c1e3a3428cce511e46b193b8b2742587da6d084e3fd56506051d40a3d7932", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "816c1e3a3428cce511e46b193b8b2742587da6d084e3fd56506051d40a3d7932", kill_on_drop: false }`
[INFO] [stdout] 816c1e3a3428cce511e46b193b8b2742587da6d084e3fd56506051d40a3d7932