[INFO] cloning repository https://github.com/asebrech/expert-system
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/asebrech/expert-system" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fasebrech%2Fexpert-system", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fasebrech%2Fexpert-system'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c8eedf9d0a8055f9fc8c49478b8e545514a0f0bd
[INFO] checking asebrech/expert-system against try#b8ee37b59c6e1f39bae18b85e057975ab0d89308 for pr-139587-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fasebrech%2Fexpert-system" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/asebrech/expert-system on toolchain b8ee37b59c6e1f39bae18b85e057975ab0d89308
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/asebrech/expert-system
[INFO] finished tweaking git repo https://github.com/asebrech/expert-system
[INFO] tweaked toml for git repo https://github.com/asebrech/expert-system written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/asebrech/expert-system 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" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c28f0515807ae8db0ce0b0d7332f987e12be6297f55648d3305efcae62f39d7
[INFO] running `Command { std: "docker" "start" "-a" "4c28f0515807ae8db0ce0b0d7332f987e12be6297f55648d3305efcae62f39d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c28f0515807ae8db0ce0b0d7332f987e12be6297f55648d3305efcae62f39d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c28f0515807ae8db0ce0b0d7332f987e12be6297f55648d3305efcae62f39d7", kill_on_drop: false }`
[INFO] [stdout] 4c28f0515807ae8db0ce0b0d7332f987e12be6297f55648d3305efcae62f39d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 24fe57b4dbb19503186388274ff8760174a7a831e0b35934478ee152a6d63f4a
[INFO] running `Command { std: "docker" "start" "-a" "24fe57b4dbb19503186388274ff8760174a7a831e0b35934478ee152a6d63f4a", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]     Checking utf8parse v0.2.2
[INFO] [stderr]     Checking anstyle v1.0.10
[INFO] [stderr]     Checking colorchoice v1.0.3
[INFO] [stderr]     Checking anstyle-query v1.1.2
[INFO] [stderr]     Checking log v0.4.26
[INFO] [stderr]     Checking is_terminal_polyfill v1.70.1
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]     Checking anstyle-parse v0.2.6
[INFO] [stderr]     Checking colored v2.2.0
[INFO] [stderr]     Checking anstream v0.6.18
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]     Checking env_filter v0.1.3
[INFO] [stderr]     Checking env_logger v0.11.6
[INFO] [stderr]     Checking ExpertSystem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/engine/neo_solver.rs:115:21
[INFO] [stdout]     |
[INFO] [stdout] 115 |                 let v = sym.unwrap();
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/engine/neo_solver.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     mut depth: usize,
[INFO] [stdout]    |     ----^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/neo_solver.rs:133:5
[INFO] [stdout]     |
[INFO] [stdout] 133 |     mut depth: usize,
[INFO] [stdout]     |     ----^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/engine/neo_solver.rs:276:10
[INFO] [stdout]     |
[INFO] [stdout] 276 |     for (i, knowledge) in initial_vec.iter().enumerate() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/engine/neo_solver.rs:115:21
[INFO] [stdout]     |
[INFO] [stdout] 115 |                 let v = sym.unwrap();
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/engine/neo_solver.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     mut depth: usize,
[INFO] [stdout]    |     ----^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/neo_solver.rs:133:5
[INFO] [stdout]     |
[INFO] [stdout] 133 |     mut depth: usize,
[INFO] [stdout]     |     ----^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/engine/neo_solver.rs:276:10
[INFO] [stdout]     |
[INFO] [stdout] 276 |     for (i, knowledge) in initial_vec.iter().enumerate() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.83s
[INFO] running `Command { std: "docker" "inspect" "24fe57b4dbb19503186388274ff8760174a7a831e0b35934478ee152a6d63f4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24fe57b4dbb19503186388274ff8760174a7a831e0b35934478ee152a6d63f4a", kill_on_drop: false }`
[INFO] [stdout] 24fe57b4dbb19503186388274ff8760174a7a831e0b35934478ee152a6d63f4a