[INFO] cloning repository https://github.com/Maurdekye/mnist-nn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Maurdekye/mnist-nn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaurdekye%2Fmnist-nn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaurdekye%2Fmnist-nn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c1c979ec7116ac971de7a432222b4f5208fea3f9
[INFO] checking Maurdekye/mnist-nn/c1c979ec7116ac971de7a432222b4f5208fea3f9 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaurdekye%2Fmnist-nn" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Maurdekye/mnist-nn on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Maurdekye/mnist-nn
[INFO] finished tweaking git repo https://github.com/Maurdekye/mnist-nn
[INFO] tweaked toml for git repo https://github.com/Maurdekye/mnist-nn written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Maurdekye/mnist-nn 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59319efc62b5087c888329281e6136dfeafe15ef1cd8b6e74063f8b535e665ae
[INFO] running `Command { std: "docker" "start" "-a" "59319efc62b5087c888329281e6136dfeafe15ef1cd8b6e74063f8b535e665ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59319efc62b5087c888329281e6136dfeafe15ef1cd8b6e74063f8b535e665ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59319efc62b5087c888329281e6136dfeafe15ef1cd8b6e74063f8b535e665ae", kill_on_drop: false }`
[INFO] [stdout] 59319efc62b5087c888329281e6136dfeafe15ef1cd8b6e74063f8b535e665ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65f9c45de40ec2e0f59b6446b9eccbf5512c0481d291b13bb6328242482800eb
[INFO] running `Command { std: "docker" "start" "-a" "65f9c45de40ec2e0f59b6446b9eccbf5512c0481d291b13bb6328242482800eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking utf8parse v0.2.1
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]     Checking anstyle-query v1.0.2
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking anstyle v1.0.6
[INFO] [stderr]     Checking clap_lex v0.7.0
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking strsim v0.11.0
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking progress-observer v3.2.0
[INFO] [stderr]     Checking anstyle-parse v0.2.3
[INFO] [stderr]     Checking anstream v0.6.13
[INFO] [stderr]     Checking itertools v0.12.1
[INFO] [stderr]     Checking clap_builder v4.5.2
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling syn v2.0.55
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling clap_derive v4.5.3
[INFO] [stderr]     Checking clap v4.5.3
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking mnist-nn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `gradient` is never read
[INFO] [stdout]    --> src/nn.rs:337:9
[INFO] [stdout]     |
[INFO] [stdout] 334 | pub struct TrainingProgress<'a> {
[INFO] [stdout]     |            ---------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 337 |     pub gradient: &'a Gradient,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `gradient` is never read
[INFO] [stdout]    --> src/nn.rs:337:9
[INFO] [stdout]     |
[INFO] [stdout] 334 | pub struct TrainingProgress<'a> {
[INFO] [stdout]     |            ---------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 337 |     pub gradient: &'a Gradient,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.94s
[INFO] running `Command { std: "docker" "inspect" "65f9c45de40ec2e0f59b6446b9eccbf5512c0481d291b13bb6328242482800eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65f9c45de40ec2e0f59b6446b9eccbf5512c0481d291b13bb6328242482800eb", kill_on_drop: false }`
[INFO] [stdout] 65f9c45de40ec2e0f59b6446b9eccbf5512c0481d291b13bb6328242482800eb