[INFO] cloning repository https://github.com/RaspPiTor/predictive
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RaspPiTor/predictive" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRaspPiTor%2Fpredictive", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRaspPiTor%2Fpredictive'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1f775bbdb2cb2a6b5069eb59211e72b4d08e77c7
[INFO] documenting RaspPiTor/predictive against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRaspPiTor%2Fpredictive" "/workspace/builds/worker-17/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-17/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RaspPiTor/predictive on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/RaspPiTor/predictive
[INFO] finished tweaking git repo https://github.com/RaspPiTor/predictive
[INFO] tweaked toml for git repo https://github.com/RaspPiTor/predictive written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] crate git repo https://github.com/RaspPiTor/predictive already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48d1013e6dbc72cba4b8d95c98a8608411f581123dd50f6c2cd2fb26629d3bae
[INFO] running `Command { std: "docker" "start" "-a" "48d1013e6dbc72cba4b8d95c98a8608411f581123dd50f6c2cd2fb26629d3bae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48d1013e6dbc72cba4b8d95c98a8608411f581123dd50f6c2cd2fb26629d3bae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48d1013e6dbc72cba4b8d95c98a8608411f581123dd50f6c2cd2fb26629d3bae", kill_on_drop: false }`
[INFO] [stdout] 48d1013e6dbc72cba4b8d95c98a8608411f581123dd50f6c2cd2fb26629d3bae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e62fb3a9af31eda673afc3b7d201db72f13a402552c020a1a9f87e2566c3217f
[INFO] running `Command { std: "docker" "start" "-a" "e62fb3a9af31eda673afc3b7d201db72f13a402552c020a1a9f87e2566c3217f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]  Documenting predictive v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around `if` condition
[INFO] [stdout]   --> src/lib.rs:68:48
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let largest_layer_capacity: usize = if { nodes_in_layer + 1 > output_size } {
[INFO] [stdout]    |                                                ^^                                ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 68 -         let largest_layer_capacity: usize = if { nodes_in_layer + 1 > output_size } {
[INFO] [stdout] 68 +         let largest_layer_capacity: usize = if nodes_in_layer + 1 > output_size {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around `if` condition
[INFO] [stdout]    --> src/lib.rs:245:28
[INFO] [stdout]     |
[INFO] [stdout] 245 |                         if { current_score < last_current_score } {
[INFO] [stdout]     |                            ^^                                  ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 245 -                         if { current_score < last_current_score } {
[INFO] [stdout] 245 +                         if current_score < last_current_score {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around `if` condition
[INFO] [stdout]    --> src/lib.rs:247:32
[INFO] [stdout]     |
[INFO] [stdout] 247 | ...                   if { current_score < new_score } {
[INFO] [stdout]     |                          ^^                         ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 247 -                             if { current_score < new_score } {
[INFO] [stdout] 247 +                             if current_score < new_score {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around `if` condition
[INFO] [stdout]    --> src/lib.rs:258:16
[INFO] [stdout]     |
[INFO] [stdout] 258 |             if { new_score < previous_score } {
[INFO] [stdout]     |                ^^                          ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 258 -             if { new_score < previous_score } {
[INFO] [stdout] 258 +             if new_score < previous_score {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around `if` condition
[INFO] [stdout]    --> src/lib.rs:277:16
[INFO] [stdout]     |
[INFO] [stdout] 277 |             if { score < best_score } {
[INFO] [stdout]     |                ^^                  ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 277 -             if { score < best_score } {
[INFO] [stdout] 277 +             if score < best_score {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core_intrinsics, test)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core_intrinsics, test)]
[INFO] [stdout]   |                             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `predictive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name predictive src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e7e6f8565019dbd1 -L dependency=/opt/rustwide/target/debug/deps --extern rand=/opt/rustwide/target/debug/deps/librand-063a04868618a482.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e62fb3a9af31eda673afc3b7d201db72f13a402552c020a1a9f87e2566c3217f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e62fb3a9af31eda673afc3b7d201db72f13a402552c020a1a9f87e2566c3217f", kill_on_drop: false }`
[INFO] [stdout] e62fb3a9af31eda673afc3b7d201db72f13a402552c020a1a9f87e2566c3217f