[INFO] cloning repository https://github.com/narayn60/matasano-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/narayn60/matasano-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnarayn60%2Fmatasano-solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnarayn60%2Fmatasano-solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4678796bdf6fe38a121eaae4e6c4fa2354a1fb9b
[INFO] documenting narayn60/matasano-solutions 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%2Fnarayn60%2Fmatasano-solutions" "/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/narayn60/matasano-solutions 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/narayn60/matasano-solutions
[INFO] finished tweaking git repo https://github.com/narayn60/matasano-solutions
[INFO] tweaked toml for git repo https://github.com/narayn60/matasano-solutions written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/narayn60/matasano-solutions 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] [stderr] warning: path `/workspace/builds/worker-4/source/src/Set1.rs` was erroneously implicitly accepted for binary `Set1`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "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] [stdout] 77b3b3a68a0e0ec63822e5eef8df3991504ed1fb933b46a167651700a65ed39e
[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" "77b3b3a68a0e0ec63822e5eef8df3991504ed1fb933b46a167651700a65ed39e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77b3b3a68a0e0ec63822e5eef8df3991504ed1fb933b46a167651700a65ed39e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77b3b3a68a0e0ec63822e5eef8df3991504ed1fb933b46a167651700a65ed39e", kill_on_drop: false }`
[INFO] [stdout] 77b3b3a68a0e0ec63822e5eef8df3991504ed1fb933b46a167651700a65ed39e
[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] f5ca4ca3fa7df87b257a2fefcb91ec9a90cc280f008505bdf017a9a2dbac0121
[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" "f5ca4ca3fa7df87b257a2fefcb91ec9a90cc280f008505bdf017a9a2dbac0121", kill_on_drop: false }`
[INFO] [stderr] warning: path `/opt/rustwide/workdir/src/Set1.rs` was erroneously implicitly accepted for binary `Set1`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]  Documenting Set1 v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected identifier, found keyword `mod`
[INFO] [stdout]  --> src/Set1.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use serialize::base64::{mod, ToBase64};
[INFO] [stdout]   |                         ^^^ expected identifier, found keyword
[INFO] [stdout]   |
[INFO] [stdout] help: you can escape reserved keywords to use them as identifiers
[INFO] [stdout]   |
[INFO] [stdout] 3 | use serialize::base64::{r#mod, ToBase64};
[INFO] [stdout]   |                         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `serialize`
[INFO] [stdout]  --> src/Set1.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate serialize;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `Set1`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name Set1 src/Set1.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "f5ca4ca3fa7df87b257a2fefcb91ec9a90cc280f008505bdf017a9a2dbac0121", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5ca4ca3fa7df87b257a2fefcb91ec9a90cc280f008505bdf017a9a2dbac0121", kill_on_drop: false }`
[INFO] [stdout] f5ca4ca3fa7df87b257a2fefcb91ec9a90cc280f008505bdf017a9a2dbac0121