[INFO] cloning repository https://github.com/zolkko/rust-katas
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zolkko/rust-katas" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzolkko%2Frust-katas", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzolkko%2Frust-katas'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1f709386406aba4cf03dfba72d69bad531540851
[INFO] documenting zolkko/rust-katas against try#6ee483316d2e4581572121d60a955affb2032eb3+cargoflags=-Zrustdoc-scrape-examples for scrape-examples
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzolkko%2Frust-katas" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zolkko/rust-katas 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 git repo https://github.com/zolkko/rust-katas
[INFO] finished tweaking git repo https://github.com/zolkko/rust-katas
[INFO] tweaked toml for git repo https://github.com/zolkko/rust-katas written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/zolkko/rust-katas already has a lockfile, it will not be regenerated
[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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] b64d9bcce1e36a883d5deabd300a58d64fe0abac4025c1a0aef1b2d2aa4f1b49
[INFO] running `Command { std: "docker" "start" "-a" "b64d9bcce1e36a883d5deabd300a58d64fe0abac4025c1a0aef1b2d2aa4f1b49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b64d9bcce1e36a883d5deabd300a58d64fe0abac4025c1a0aef1b2d2aa4f1b49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b64d9bcce1e36a883d5deabd300a58d64fe0abac4025c1a0aef1b2d2aa4f1b49", kill_on_drop: false }`
[INFO] [stdout] b64d9bcce1e36a883d5deabd300a58d64fe0abac4025c1a0aef1b2d2aa4f1b49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] bf2dcccd481d6371fcfdac64dd2095a665c148c4130a978db1bc2b2634f57317
[INFO] running `Command { std: "docker" "start" "-a" "bf2dcccd481d6371fcfdac64dd2095a665c148c4130a978db1bc2b2634f57317", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking futures-io v0.3.16
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]    Compiling anyhow v1.0.66
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]     Checking matrixmultiply v0.3.1
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]    Compiling rust-katas v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling tokio v1.9.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking filetime v0.2.14
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking ndarray v0.15.3
[INFO] [stderr]     Checking notify v4.0.17
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking futures-executor v0.3.16
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Checking tokio-util v0.6.7
[INFO] [stderr]     Scraping rust-katas v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: failed to scan bin "async_book" in package `rust-katas` 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: `rust-katas` (bin "async_book") generated 1 warning
[INFO] [stderr]  Documenting rust-katas v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.74s
[INFO] running `Command { std: "docker" "inspect" "bf2dcccd481d6371fcfdac64dd2095a665c148c4130a978db1bc2b2634f57317", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf2dcccd481d6371fcfdac64dd2095a665c148c4130a978db1bc2b2634f57317", kill_on_drop: false }`
[INFO] [stdout] bf2dcccd481d6371fcfdac64dd2095a665c148c4130a978db1bc2b2634f57317