[INFO] cloning repository https://github.com/derezzedex/puzzle_solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/derezzedex/puzzle_solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fderezzedex%2Fpuzzle_solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fderezzedex%2Fpuzzle_solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 12ff182c6baa90371baf565b4980d30c74f7b831
[INFO] documenting derezzedex/puzzle_solver against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fderezzedex%2Fpuzzle_solver" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/derezzedex/puzzle_solver on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/derezzedex/puzzle_solver
[INFO] finished tweaking git repo https://github.com/derezzedex/puzzle_solver
[INFO] tweaked toml for git repo https://github.com/derezzedex/puzzle_solver written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/derezzedex/puzzle_solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.24
[INFO] [stderr]   Downloaded serde v1.0.24
[INFO] [stderr]   Downloaded docopt v0.8.1
[INFO] [stderr]   Downloaded regex v0.2.3
[INFO] [stderr]   Downloaded serde_derive_internals v0.18.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6792eaedc39c8e0dcc2362154ed09f654e7533049ca8f28d28290ca45e2c4e95
[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" "6792eaedc39c8e0dcc2362154ed09f654e7533049ca8f28d28290ca45e2c4e95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6792eaedc39c8e0dcc2362154ed09f654e7533049ca8f28d28290ca45e2c4e95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6792eaedc39c8e0dcc2362154ed09f654e7533049ca8f28d28290ca45e2c4e95", kill_on_drop: false }`
[INFO] [stdout] 6792eaedc39c8e0dcc2362154ed09f654e7533049ca8f28d28290ca45e2c4e95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef6b49a14dcb4e74fd7cd4b43628d04ccf40d89bcab5b90704b06b05afcb1c6f
[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" "ef6b49a14dcb4e74fd7cd4b43628d04ccf40d89bcab5b90704b06b05afcb1c6f", kill_on_drop: false }`
[INFO] [stderr]     Checking serde v1.0.24
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]    Compiling serde_derive_internals v0.18.0
[INFO] [stderr]    Compiling serde_derive v1.0.24
[INFO] [stderr]     Checking docopt v0.8.1
[INFO] [stderr]  Documenting puzzle_solver v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:308:13
[INFO] [stdout]     |
[INFO] [stdout] 308 |                 let r = (33 + ((i+14)%94));
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.75s
[INFO] running `Command { std: "docker" "inspect" "ef6b49a14dcb4e74fd7cd4b43628d04ccf40d89bcab5b90704b06b05afcb1c6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef6b49a14dcb4e74fd7cd4b43628d04ccf40d89bcab5b90704b06b05afcb1c6f", kill_on_drop: false }`
[INFO] [stdout] ef6b49a14dcb4e74fd7cd4b43628d04ccf40d89bcab5b90704b06b05afcb1c6f