[INFO] cloning repository https://github.com/3nabla3/ttt_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/3nabla3/ttt_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3nabla3%2Fttt_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3nabla3%2Fttt_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 403cadf68ea0279afef2b6d6175944c99f99f618
[INFO] checking 3nabla3/ttt_rust against master#8f21a5c92ea55c348c275a1bc4fedbdf181e0d64 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3nabla3%2Fttt_rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/3nabla3/ttt_rust
[INFO] finished tweaking git repo https://github.com/3nabla3/ttt_rust
[INFO] tweaked toml for git repo https://github.com/3nabla3/ttt_rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/3nabla3/ttt_rust on toolchain 8f21a5c92ea55c348c275a1bc4fedbdf181e0d64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/3nabla3/ttt_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4b4370d46e7e8662801f7b3a7ea909ca7958d695c99a2d21e26c2669016da4a
[INFO] running `Command { std: "docker" "start" "-a" "b4b4370d46e7e8662801f7b3a7ea909ca7958d695c99a2d21e26c2669016da4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4b4370d46e7e8662801f7b3a7ea909ca7958d695c99a2d21e26c2669016da4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4b4370d46e7e8662801f7b3a7ea909ca7958d695c99a2d21e26c2669016da4a", kill_on_drop: false }`
[INFO] [stdout] b4b4370d46e7e8662801f7b3a7ea909ca7958d695c99a2d21e26c2669016da4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 95634d3a0a2068c316bea90daf34aa4f92a31028c8449e4e68c7420f8eb09737
[INFO] running `Command { std: "docker" "start" "-a" "95634d3a0a2068c316bea90daf34aa4f92a31028c8449e4e68c7420f8eb09737", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking ttt_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `children` is never read
[INFO] [stdout]   --> src/minimax/mod.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Node {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 12 |     ttt: TicTacToe,
[INFO] [stdout] 13 |     pub children: Vec<Node>
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/minimax/child_gen.rs:10:31
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn generate_children(ttt: &TicTacToe) -> ChildGen {
[INFO] [stdout]    |                               ^^^^^^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                               |
[INFO] [stdout]    |                               this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn generate_children(ttt: &TicTacToe) -> ChildGen<'_> {
[INFO] [stdout]    |                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `children` is never read
[INFO] [stdout]   --> src/minimax/mod.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Node {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 12 |     ttt: TicTacToe,
[INFO] [stdout] 13 |     pub children: Vec<Node>
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/minimax/child_gen.rs:10:31
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn generate_children(ttt: &TicTacToe) -> ChildGen {
[INFO] [stdout]    |                               ^^^^^^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                               |
[INFO] [stdout]    |                               this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn generate_children(ttt: &TicTacToe) -> ChildGen<'_> {
[INFO] [stdout]    |                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.01s
[INFO] running `Command { std: "docker" "inspect" "95634d3a0a2068c316bea90daf34aa4f92a31028c8449e4e68c7420f8eb09737", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95634d3a0a2068c316bea90daf34aa4f92a31028c8449e4e68c7420f8eb09737", kill_on_drop: false }`
[INFO] [stdout] 95634d3a0a2068c316bea90daf34aa4f92a31028c8449e4e68c7420f8eb09737
