[INFO] cloning repository https://github.com/leona-art/nn-learn-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/leona-art/nn-learn-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleona-art%2Fnn-learn-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleona-art%2Fnn-learn-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 992563ee69a56b245f34eca630ba46ece72d62d4
[INFO] testing leona-art/nn-learn-rs against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleona-art%2Fnn-learn-rs" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/leona-art/nn-learn-rs
[INFO] finished tweaking git repo https://github.com/leona-art/nn-learn-rs
[INFO] tweaked toml for git repo https://github.com/leona-art/nn-learn-rs written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/leona-art/nn-learn-rs on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/leona-art/nn-learn-rs 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-2026-04-21" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0d7639224ec7cd04ebf1e0ed14441bcdd0783f8acd6f43d3593df7a9ff0a073
[INFO] running `Command { std: "docker" "start" "-a" "c0d7639224ec7cd04ebf1e0ed14441bcdd0783f8acd6f43d3593df7a9ff0a073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0d7639224ec7cd04ebf1e0ed14441bcdd0783f8acd6f43d3593df7a9ff0a073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0d7639224ec7cd04ebf1e0ed14441bcdd0783f8acd6f43d3593df7a9ff0a073", kill_on_drop: false }`
[INFO] [stdout] c0d7639224ec7cd04ebf1e0ed14441bcdd0783f8acd6f43d3593df7a9ff0a073
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce6cbbca1d9bf354f32af6c63c6d62a9aaaa8e0f96ecc015a874421d0ac5c66f
[INFO] running `Command { std: "docker" "start" "-a" "ce6cbbca1d9bf354f32af6c63c6d62a9aaaa8e0f96ecc015a874421d0ac5c66f", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling syn v2.0.76
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling nn-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/network.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut loss = Self::compute_loss(forward_outputs.last().unwrap(), target);
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.22s
[INFO] running `Command { std: "docker" "inspect" "ce6cbbca1d9bf354f32af6c63c6d62a9aaaa8e0f96ecc015a874421d0ac5c66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce6cbbca1d9bf354f32af6c63c6d62a9aaaa8e0f96ecc015a874421d0ac5c66f", kill_on_drop: false }`
[INFO] [stdout] ce6cbbca1d9bf354f32af6c63c6d62a9aaaa8e0f96ecc015a874421d0ac5c66f
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5a730b97730a7241a2f3319de07309c9486a0eb31dc4f95b210565110209ef3
[INFO] running `Command { std: "docker" "start" "-a" "c5a730b97730a7241a2f3319de07309c9486a0eb31dc4f95b210565110209ef3", kill_on_drop: false }`
[INFO] [stderr]    Compiling nn-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/network.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut loss = Self::compute_loss(forward_outputs.last().unwrap(), target);
[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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "c5a730b97730a7241a2f3319de07309c9486a0eb31dc4f95b210565110209ef3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5a730b97730a7241a2f3319de07309c9486a0eb31dc4f95b210565110209ef3", kill_on_drop: false }`
[INFO] [stdout] c5a730b97730a7241a2f3319de07309c9486a0eb31dc4f95b210565110209ef3
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 98d28c4fbdb9b2dec76a8af729959c4456af33cdde65966c6cf62862c4cdb854
[INFO] running `Command { std: "docker" "start" "-a" "98d28c4fbdb9b2dec76a8af729959c4456af33cdde65966c6cf62862c4cdb854", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/network.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let mut loss = Self::compute_loss(forward_outputs.last().unwrap(), target);
[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: `nn-rs` (bin "nn-rs" test) generated 1 warning (run `cargo fix --bin "nn-rs" -p nn-rs --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/nn_rs-2dfb577710c645a6)
[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] running `Command { std: "docker" "inspect" "98d28c4fbdb9b2dec76a8af729959c4456af33cdde65966c6cf62862c4cdb854", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98d28c4fbdb9b2dec76a8af729959c4456af33cdde65966c6cf62862c4cdb854", kill_on_drop: false }`
[INFO] [stdout] 98d28c4fbdb9b2dec76a8af729959c4456af33cdde65966c6cf62862c4cdb854
