[INFO] cloning repository https://github.com/chris-moreton/rusty-rival
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chris-moreton/rusty-rival" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchris-moreton%2Frusty-rival", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchris-moreton%2Frusty-rival'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d4b44cd9798054f848e9489a4eb1b6a0d770e6c
[INFO] testing chris-moreton/rusty-rival against beta-2025-09-21 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchris-moreton%2Frusty-rival" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/chris-moreton/rusty-rival
[INFO] finished tweaking git repo https://github.com/chris-moreton/rusty-rival
[INFO] tweaked toml for git repo https://github.com/chris-moreton/rusty-rival written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/chris-moreton/rusty-rival on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/chris-moreton/rusty-rival 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" "+beta-2025-09-21" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d6457ea557cb73682d2378e43b06e770654365af738a4d18cd1cfbf21a02626
[INFO] running `Command { std: "docker" "start" "-a" "5d6457ea557cb73682d2378e43b06e770654365af738a4d18cd1cfbf21a02626", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d6457ea557cb73682d2378e43b06e770654365af738a4d18cd1cfbf21a02626", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d6457ea557cb73682d2378e43b06e770654365af738a4d18cd1cfbf21a02626", kill_on_drop: false }`
[INFO] [stdout] 5d6457ea557cb73682d2378e43b06e770654365af738a4d18cd1cfbf21a02626
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f21d266c8f1de059d90f3c55ca9bb71123d3f03e93fded3a9e50dabc91eac10
[INFO] running `Command { std: "docker" "start" "-a" "0f21d266c8f1de059d90f3c55ca9bb71123d3f03e93fded3a9e50dabc91eac10", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling smallvec v1.10.0
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[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bitflags v2.4.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.9
[INFO] [stderr]    Compiling rustix v0.36.11
[INFO] [stderr]    Compiling rustix v0.38.19
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]    Compiling memchr v2.6.4
[INFO] [stderr]    Compiling rayon-core v1.12.0
[INFO] [stderr]    Compiling linux-raw-sys v0.4.10
[INFO] [stderr]    Compiling linux-raw-sys v0.1.4
[INFO] [stderr]    Compiling nibble_vec v0.1.0
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling futures v0.1.31
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling endian-type v0.1.2
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling scrap v0.5.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling radix_trie v0.2.1
[INFO] [stderr]    Compiling arrayvec v0.7.4
[INFO] [stderr]    Compiling block v0.1.6
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling is-terminal v0.4.9
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling mio v0.8.6
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling signal-hook-mio v0.2.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling regex-automata v0.4.2
[INFO] [stderr]    Compiling nix v0.26.2
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling utf8parse v0.2.1
[INFO] [stderr]    Compiling itoa v1.0.9
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling home v0.5.5
[INFO] [stderr]    Compiling fd-lock v3.0.10
[INFO] [stderr]    Compiling num-format v0.4.4
[INFO] [stderr]    Compiling rayon v1.8.0
[INFO] [stderr]    Compiling fs v0.0.5
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling crossterm v0.27.0
[INFO] [stderr]    Compiling colored v2.0.4
[INFO] [stderr]    Compiling rustyline v12.0.0
[INFO] [stderr]    Compiling md5 v0.7.0
[INFO] [stderr]    Compiling figlet-rs v0.1.5
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling regex v1.10.1
[INFO] [stderr]    Compiling rusty-rival v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:239:11
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn cmd_go(mut uci_state: &mut UciState, search_state: &mut SearchState, parts: Vec<&str>) -> Either<String, Option<String>> {
[INFO] [stdout]     |           ----^^^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:293:27
[INFO] [stdout]     |
[INFO] [stdout] 293 | fn calc_from_colour_times(mut uci_state: &mut UciState, millis: u64, inc_millis: u64) {
[INFO] [stdout]     |                           ----^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:324:14
[INFO] [stdout]     |
[INFO] [stdout] 324 | fn cmd_debug(mut uci_state: &mut UciState, parts: Vec<&str>) -> Either<String, Option<String>> {
[INFO] [stdout]     |              ----^^^^^^^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:387:19
[INFO] [stdout]     |
[INFO] [stdout] 387 | fn cmd_ucinewgame(mut uci_state: &mut UciState, mut search_state: &mut SearchState) -> Either<String, Option<String>> {
[INFO] [stdout]     |                   ----^^^^^^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:387:49
[INFO] [stdout]     |
[INFO] [stdout] 387 | fn cmd_ucinewgame(mut uci_state: &mut UciState, mut search_state: &mut SearchState) -> Either<String, Option<String>> {
[INFO] [stdout]     |                                                 ----^^^^^^^^^^^^
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_white`
[INFO] [stdout]    --> src/uci.rs:403:13
[INFO] [stdout]     |
[INFO] [stdout] 403 | fn cmd_scan(is_white: bool) -> Either<String, Option<String>> {
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 403 | fn cmd_scan(_is_white: bool) -> Either<String, Option<String>> {
[INFO] [stdout]     |             +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `DEBUG`
[INFO] [stdout]     |
[INFO] [stdout] 403 - fn cmd_scan(is_white: bool) -> Either<String, Option<String>> {
[INFO] [stdout] 403 + fn cmd_scan(engine_constants::DEBUG: bool) -> Either<String, Option<String>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 46.25s
[INFO] running `Command { std: "docker" "inspect" "0f21d266c8f1de059d90f3c55ca9bb71123d3f03e93fded3a9e50dabc91eac10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f21d266c8f1de059d90f3c55ca9bb71123d3f03e93fded3a9e50dabc91eac10", kill_on_drop: false }`
[INFO] [stdout] 0f21d266c8f1de059d90f3c55ca9bb71123d3f03e93fded3a9e50dabc91eac10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3111bf82341aad8cf78119c6f21cd6d3f56f2197db54c57f6fb04181d7cd4188
[INFO] running `Command { std: "docker" "start" "-a" "3111bf82341aad8cf78119c6f21cd6d3f56f2197db54c57f6fb04181d7cd4188", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusty-rival v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:239:11
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn cmd_go(mut uci_state: &mut UciState, search_state: &mut SearchState, parts: Vec<&str>) -> Either<String, Option<String>> {
[INFO] [stdout]     |           ----^^^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:293:27
[INFO] [stdout]     |
[INFO] [stdout] 293 | fn calc_from_colour_times(mut uci_state: &mut UciState, millis: u64, inc_millis: u64) {
[INFO] [stdout]     |                           ----^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:324:14
[INFO] [stdout]     |
[INFO] [stdout] 324 | fn cmd_debug(mut uci_state: &mut UciState, parts: Vec<&str>) -> Either<String, Option<String>> {
[INFO] [stdout]     |              ----^^^^^^^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:387:19
[INFO] [stdout]     |
[INFO] [stdout] 387 | fn cmd_ucinewgame(mut uci_state: &mut UciState, mut search_state: &mut SearchState) -> Either<String, Option<String>> {
[INFO] [stdout]     |                   ----^^^^^^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:387:49
[INFO] [stdout]     |
[INFO] [stdout] 387 | fn cmd_ucinewgame(mut uci_state: &mut UciState, mut search_state: &mut SearchState) -> Either<String, Option<String>> {
[INFO] [stdout]     |                                                 ----^^^^^^^^^^^^
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_white`
[INFO] [stdout]    --> src/uci.rs:403:13
[INFO] [stdout]     |
[INFO] [stdout] 403 | fn cmd_scan(is_white: bool) -> Either<String, Option<String>> {
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 403 | fn cmd_scan(_is_white: bool) -> Either<String, Option<String>> {
[INFO] [stdout]     |             +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `DEBUG`
[INFO] [stdout]     |
[INFO] [stdout] 403 - fn cmd_scan(is_white: bool) -> Either<String, Option<String>> {
[INFO] [stdout] 403 + fn cmd_scan(engine_constants::DEBUG: bool) -> Either<String, Option<String>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:239:11
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn cmd_go(mut uci_state: &mut UciState, search_state: &mut SearchState, parts: Vec<&str>) -> Either<String, Option<String>> {
[INFO] [stdout]     |           ----^^^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:293:27
[INFO] [stdout]     |
[INFO] [stdout] 293 | fn calc_from_colour_times(mut uci_state: &mut UciState, millis: u64, inc_millis: u64) {
[INFO] [stdout]     |                           ----^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:324:14
[INFO] [stdout]     |
[INFO] [stdout] 324 | fn cmd_debug(mut uci_state: &mut UciState, parts: Vec<&str>) -> Either<String, Option<String>> {
[INFO] [stdout]     |              ----^^^^^^^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:387:19
[INFO] [stdout]     |
[INFO] [stdout] 387 | fn cmd_ucinewgame(mut uci_state: &mut UciState, mut search_state: &mut SearchState) -> Either<String, Option<String>> {
[INFO] [stdout]     |                   ----^^^^^^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/uci.rs:387:49
[INFO] [stdout]     |
[INFO] [stdout] 387 | fn cmd_ucinewgame(mut uci_state: &mut UciState, mut search_state: &mut SearchState) -> Either<String, Option<String>> {
[INFO] [stdout]     |                                                 ----^^^^^^^^^^^^
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_white`
[INFO] [stdout]    --> src/uci.rs:403:13
[INFO] [stdout]     |
[INFO] [stdout] 403 | fn cmd_scan(is_white: bool) -> Either<String, Option<String>> {
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 403 | fn cmd_scan(_is_white: bool) -> Either<String, Option<String>> {
[INFO] [stdout]     |             +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `DEBUG`
[INFO] [stdout]     |
[INFO] [stdout] 403 - fn cmd_scan(is_white: bool) -> Either<String, Option<String>> {
[INFO] [stdout] 403 + fn cmd_scan(engine_constants::DEBUG: bool) -> Either<String, Option<String>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 6.82s
[INFO] running `Command { std: "docker" "inspect" "3111bf82341aad8cf78119c6f21cd6d3f56f2197db54c57f6fb04181d7cd4188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3111bf82341aad8cf78119c6f21cd6d3f56f2197db54c57f6fb04181d7cd4188", kill_on_drop: false }`
[INFO] [stdout] 3111bf82341aad8cf78119c6f21cd6d3f56f2197db54c57f6fb04181d7cd4188
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 996aee5e3aeec0e2728fbff5c78bdb6ca3e5189855594d101479ac02e69318bb
[INFO] running `Command { std: "docker" "start" "-a" "996aee5e3aeec0e2728fbff5c78bdb6ca3e5189855594d101479ac02e69318bb", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/uci.rs:239:11
[INFO] [stderr]     |
[INFO] [stderr] 239 | fn cmd_go(mut uci_state: &mut UciState, search_state: &mut SearchState, parts: Vec<&str>) -> Either<String, Option<String>> {
[INFO] [stderr]     |           ----^^^^^^^^^
[INFO] [stderr]     |           |
[INFO] [stderr]     |           help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/uci.rs:293:27
[INFO] [stderr]     |
[INFO] [stderr] 293 | fn calc_from_colour_times(mut uci_state: &mut UciState, millis: u64, inc_millis: u64) {
[INFO] [stderr]     |                           ----^^^^^^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/uci.rs:324:14
[INFO] [stderr]     |
[INFO] [stderr] 324 | fn cmd_debug(mut uci_state: &mut UciState, parts: Vec<&str>) -> Either<String, Option<String>> {
[INFO] [stderr]     |              ----^^^^^^^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/uci.rs:387:19
[INFO] [stderr]     |
[INFO] [stderr] 387 | fn cmd_ucinewgame(mut uci_state: &mut UciState, mut search_state: &mut SearchState) -> Either<String, Option<String>> {
[INFO] [stderr]     |                   ----^^^^^^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/uci.rs:387:49
[INFO] [stderr]     |
[INFO] [stderr] 387 | fn cmd_ucinewgame(mut uci_state: &mut UciState, mut search_state: &mut SearchState) -> Either<String, Option<String>> {
[INFO] [stderr]     |                                                 ----^^^^^^^^^^^^
[INFO] [stderr]     |                                                 |
[INFO] [stderr]     |                                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `is_white`
[INFO] [stderr]    --> src/uci.rs:403:13
[INFO] [stderr]     |
[INFO] [stderr] 403 | fn cmd_scan(is_white: bool) -> Either<String, Option<String>> {
[INFO] [stderr]     |             ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: if this is intentional, prefix it with an underscore
[INFO] [stderr]     |
[INFO] [stderr] 403 | fn cmd_scan(_is_white: bool) -> Either<String, Option<String>> {
[INFO] [stderr]     |             +
[INFO] [stderr] help: you might have meant to pattern match on the similarly named constant `DEBUG`
[INFO] [stderr]     |
[INFO] [stderr] 403 - fn cmd_scan(is_white: bool) -> Either<String, Option<String>> {
[INFO] [stderr] 403 + fn cmd_scan(engine_constants::DEBUG: bool) -> Either<String, Option<String>> {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `rusty-rival` (lib) generated 6 warnings (run `cargo fix --lib -p rusty-rival` to apply 6 suggestions)
[INFO] [stderr] warning: `rusty-rival` (lib test) generated 6 warnings (6 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rusty_rival-b4aff5cba649086b)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rusty_rival-36d78ec3103cce69)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/bitboards.rs (/opt/rustwide/target/debug/deps/bitboards-f67b896924a1b456)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test it_knows_when_exactly_one_bit_is_set ... ok
[INFO] [stdout] test it_north_fills ... ok
[INFO] [stdout] test it_returns_the_correct_bitboard_for_mover ... ok
[INFO] [stdout] test it_sets_a_bit ... ok
[INFO] [stdout] test it_south_fills ... ok
[INFO] [stdout] test it_tests_whether_a_bit_is_set ... ok
[INFO] [stdout] test it_passes_sanity_checks_for_values_expressed_as_functions ... ok
[INFO] [stdout] test it_returns_a_bitboard_with_the_given_bit_set_to_zero ... ok
[INFO] [stderr]      Running tests/epd.rs (/opt/rustwide/target/debug/deps/epd-4ad42a089258a891)
[INFO] [stdout] test it_gets_the_rank_bits_for_a_piece ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test it_finds_the_best_move ... ignored
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/evaluate.rs (/opt/rustwide/target/debug/deps/evaluate-0161c39886e0c599)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test it_gets_the_material_score ... ok
[INFO] [stdout] test it_gets_knight_fork_threats ... ok
[INFO] [stdout] test it_gets_the_passed_pawn_score ... ok
[INFO] [stdout] test it_evaluates_king_threats ... ok
[INFO] [stdout] test it_gets_the_pawn_score ... ok
[INFO] [stdout] test it_knows_insufficient_material ... ok
[INFO] [stdout] test it_gets_the_passed_knight_score ... ok
[INFO] [stdout] test it_evaluates_king_safety ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/fen.rs (/opt/rustwide/target/debug/deps/fen-b4b6e77f6cd5e64f)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test it_converts_a_bit_array_to_decimal ... ok
[INFO] [stdout] test it_converts_an_algebraic_square_to_a_bitref ... ok
[INFO] [stdout] test it_gets_a_char_as_a_number ... ok
[INFO] [stdout] test it_creates_a_fen_from_a_position ... ok
[INFO] [stdout] test it_creates_a_position_from_a_fen_2 ... ok
[INFO] [stdout] test it_gets_a_piece_bitboard ... ok
[INFO] [stdout] test it_converts_a_bitref_to_an_algebraic_square ... ok
[INFO] [stdout] test it_converts_a_simple_move_to_an_algebraic_move ... ok
[INFO] [stdout] test it_converts_a_compact_move_to_an_algebraic_move ... ok
[INFO] [stdout] test it_converts_an_algebraic_move_to_a_move ... ok
[INFO] [stdout] test it_gets_the_rank_bits_for_a_piece ... ok
[INFO] [stdout] test it_returns_a_char_representing_the_piece_on_a_square ... ok
[INFO] [stdout] test it_gets_the_board_bits ... ok
[INFO] [stdout] test it_gets_the_board_part_from_the_fen ... ok
[INFO] [stdout] test it_gets_the_fen_ranks ... ok
[INFO] [stdout] test it_creates_a_position_from_a_fen ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/make_move.rs (/opt/rustwide/target/debug/deps/make_move-82d8703bc6ba661b)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test it_calculates_correct_zobrist_after_a_castle_move ... ok
[INFO] [stdout] test it_calculates_correct_zobrist_after_a_king_move ... ok
[INFO] [stdout] test it_calculates_correct_zobrist_after_a_non_capture ... ok
[INFO] [stderr] 
[INFO] [stdout] test it_calculates_correct_zobrist_after_a_capture ... ok
[INFO] [stdout] test it_calculates_correct_zobrist_after_a_king_makes_a_capture ... ok
[INFO] [stdout] test it_calculates_correct_zobrist_after_en_passant_option_removed ... ok
[INFO] [stdout] test it_calculates_correct_zobrist_after_en_passant_capture ... ok
[INFO] [stdout] test it_calculates_correct_zobrist_after_simple_pawn_move ... ok
[INFO] [stderr] thread 'it_makes_a_move' (65) has overflowed its stack
[INFO] [stdout] test it_calculates_correct_zobrist_after_pawn_promotion ... ok
[INFO] [stderr] fatal runtime error: stack overflow, aborting
[INFO] [stdout] test it_calculates_correct_zobrist_after_pawn_capture ... ok
[INFO] [stderr] error: test failed, to rerun pass `--test make_move`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/make_move-82d8703bc6ba661b` (signal: 6, SIGABRT: process abort signal)
[INFO] running `Command { std: "docker" "inspect" "996aee5e3aeec0e2728fbff5c78bdb6ca3e5189855594d101479ac02e69318bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "996aee5e3aeec0e2728fbff5c78bdb6ca3e5189855594d101479ac02e69318bb", kill_on_drop: false }`
[INFO] [stdout] 996aee5e3aeec0e2728fbff5c78bdb6ca3e5189855594d101479ac02e69318bb
