[INFO] cloning repository https://github.com/Papsanly/CopperMind
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Papsanly/CopperMind" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPapsanly%2FCopperMind", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPapsanly%2FCopperMind'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 005d6b3bc707b6be93c54b2c8358aaecaf7ec97e
[INFO] building Papsanly/CopperMind against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPapsanly%2FCopperMind" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Papsanly/CopperMind on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Papsanly/CopperMind
[INFO] finished tweaking git repo https://github.com/Papsanly/CopperMind
[INFO] tweaked toml for git repo https://github.com/Papsanly/CopperMind written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Papsanly/CopperMind 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b72fa2fa27ee2ddb5158471ebc25ee7044dbb4bcf2bc12377fa472dc8e726fb5
[INFO] running `Command { std: "docker" "start" "-a" "b72fa2fa27ee2ddb5158471ebc25ee7044dbb4bcf2bc12377fa472dc8e726fb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b72fa2fa27ee2ddb5158471ebc25ee7044dbb4bcf2bc12377fa472dc8e726fb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b72fa2fa27ee2ddb5158471ebc25ee7044dbb4bcf2bc12377fa472dc8e726fb5", kill_on_drop: false }`
[INFO] [stdout] b72fa2fa27ee2ddb5158471ebc25ee7044dbb4bcf2bc12377fa472dc8e726fb5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2a61f5bc49d9024d28fa508d517755818f0081273477c56db0b325a4f0562a9
[INFO] running `Command { std: "docker" "start" "-a" "d2a61f5bc49d9024d28fa508d517755818f0081273477c56db0b325a4f0562a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling copper_mind v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `mini_batch`
[INFO] [stdout]    --> src/lib.rs:101:25
[INFO] [stdout]     |
[INFO] [stdout] 101 |     fn back_prop(&self, mini_batch: &MiniBatch<INPUT_SIZE>) -> Vec<Vec<Neuron>> {
[INFO] [stdout]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mini_batch`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.75s
[INFO] running `Command { std: "docker" "inspect" "d2a61f5bc49d9024d28fa508d517755818f0081273477c56db0b325a4f0562a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2a61f5bc49d9024d28fa508d517755818f0081273477c56db0b325a4f0562a9", kill_on_drop: false }`
[INFO] [stdout] d2a61f5bc49d9024d28fa508d517755818f0081273477c56db0b325a4f0562a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3390b9832dc394418433ea58a6b0a25690a31504df9345d625ec95fd6cd7317b
[INFO] running `Command { std: "docker" "start" "-a" "3390b9832dc394418433ea58a6b0a25690a31504df9345d625ec95fd6cd7317b", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `mini_batch`
[INFO] [stdout]    --> src/lib.rs:101:25
[INFO] [stdout]     |
[INFO] [stdout] 101 |     fn back_prop(&self, mini_batch: &MiniBatch<INPUT_SIZE>) -> Vec<Vec<Neuron>> {
[INFO] [stdout]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mini_batch`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling copper_mind v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `test_labels`
[INFO] [stdout]   --> examples/mnist.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let test_labels = read_mnist_labels("t10k").unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_test_labels`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `predictions`
[INFO] [stdout]   --> examples/mnist.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let predictions = perceptron.predict(&test_data);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_predictions`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mini_batch`
[INFO] [stdout]    --> src/lib.rs:101:25
[INFO] [stdout]     |
[INFO] [stdout] 101 |     fn back_prop(&self, mini_batch: &MiniBatch<INPUT_SIZE>) -> Vec<Vec<Neuron>> {
[INFO] [stdout]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mini_batch`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "3390b9832dc394418433ea58a6b0a25690a31504df9345d625ec95fd6cd7317b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3390b9832dc394418433ea58a6b0a25690a31504df9345d625ec95fd6cd7317b", kill_on_drop: false }`
[INFO] [stdout] 3390b9832dc394418433ea58a6b0a25690a31504df9345d625ec95fd6cd7317b