[INFO] cloning repository https://github.com/gcharnock/neural-network-handwriting
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gcharnock/neural-network-handwriting" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgcharnock%2Fneural-network-handwriting", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgcharnock%2Fneural-network-handwriting'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 14fa3d41a5acbfb979a5bf2bd10b869476659794
[INFO] documenting gcharnock/neural-network-handwriting against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgcharnock%2Fneural-network-handwriting" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gcharnock/neural-network-handwriting on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gcharnock/neural-network-handwriting
[INFO] finished tweaking git repo https://github.com/gcharnock/neural-network-handwriting
[INFO] tweaked toml for git repo https://github.com/gcharnock/neural-network-handwriting written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/gcharnock/neural-network-handwriting already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 75416608c3a70ac01a6aad12b40cffd1db7ad48783232633931891fa235fa5f9
[INFO] running `Command { std: "docker" "start" "-a" "75416608c3a70ac01a6aad12b40cffd1db7ad48783232633931891fa235fa5f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75416608c3a70ac01a6aad12b40cffd1db7ad48783232633931891fa235fa5f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75416608c3a70ac01a6aad12b40cffd1db7ad48783232633931891fa235fa5f9", kill_on_drop: false }`
[INFO] [stdout] 75416608c3a70ac01a6aad12b40cffd1db7ad48783232633931891fa235fa5f9
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] adf3ffceb784f561176e591b55dac8e63ef8209c2d77a71cc6e7e4078786a16d
[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" "adf3ffceb784f561176e591b55dac8e63ef8209c2d77a71cc6e7e4078786a16d", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]     Checking byteorder v1.2.3
[INFO] [stderr]  Documenting neural_network_handwriting v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `assert_approx_eq`
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate assert_approx_eq;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `neural_network_handwriting`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name neural_network_handwriting src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-2e158bc83a2e97d4.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-379542f6cdab2d60.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-01097136fce75e79.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "adf3ffceb784f561176e591b55dac8e63ef8209c2d77a71cc6e7e4078786a16d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adf3ffceb784f561176e591b55dac8e63ef8209c2d77a71cc6e7e4078786a16d", kill_on_drop: false }`
[INFO] [stdout] adf3ffceb784f561176e591b55dac8e63ef8209c2d77a71cc6e7e4078786a16d