[INFO] fetching crate micrograd_rs_nt 0.1.0...
[INFO] checking micrograd_rs_nt-0.1.0 against master#092a284ba0421695f2032c947765429fd7095796 for pr-139763
[INFO] extracting crate micrograd_rs_nt 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate micrograd_rs_nt 0.1.0 on toolchain 092a284ba0421695f2032c947765429fd7095796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+092a284ba0421695f2032c947765429fd7095796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate micrograd_rs_nt 0.1.0
[INFO] finished tweaking crates.io crate micrograd_rs_nt 0.1.0
[INFO] tweaked toml for crates.io crate micrograd_rs_nt 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate micrograd_rs_nt 0.1.0 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" "+092a284ba0421695f2032c947765429fd7095796" "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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+092a284ba0421695f2032c947765429fd7095796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef73243d356296761a566c0cf75795c95b5cce758e295167789aa3e844cfc4bf
[INFO] running `Command { std: "docker" "start" "-a" "ef73243d356296761a566c0cf75795c95b5cce758e295167789aa3e844cfc4bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef73243d356296761a566c0cf75795c95b5cce758e295167789aa3e844cfc4bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef73243d356296761a566c0cf75795c95b5cce758e295167789aa3e844cfc4bf", kill_on_drop: false }`
[INFO] [stdout] ef73243d356296761a566c0cf75795c95b5cce758e295167789aa3e844cfc4bf
[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" "-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" "+092a284ba0421695f2032c947765429fd7095796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c2e77dcbea35460e9edb42de076d10794e302105d2eda6498f761d1ba64e218c
[INFO] running `Command { std: "docker" "start" "-a" "c2e77dcbea35460e9edb42de076d10794e302105d2eda6498f761d1ba64e218c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling uuid-macro-internal v1.10.0
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking uuid v1.10.0
[INFO] [stderr]     Checking micrograd_rs_nt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `zero_grad` is never used
[INFO] [stdout]   --> src/nn.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Neuron {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 54 |     pub fn zero_grad(&self) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `zero_grad` is never used
[INFO] [stdout]   --> src/nn.rs:90:12
[INFO] [stdout]    |
[INFO] [stdout] 65 | impl Layer {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 90 |     pub fn zero_grad(&self) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `zero_grad` is never used
[INFO] [stdout]   --> src/nn.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Neuron {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 54 |     pub fn zero_grad(&self) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `zero_grad` is never used
[INFO] [stdout]   --> src/nn.rs:90:12
[INFO] [stdout]    |
[INFO] [stdout] 65 | impl Layer {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 90 |     pub fn zero_grad(&self) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.37s
[INFO] running `Command { std: "docker" "inspect" "c2e77dcbea35460e9edb42de076d10794e302105d2eda6498f761d1ba64e218c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2e77dcbea35460e9edb42de076d10794e302105d2eda6498f761d1ba64e218c", kill_on_drop: false }`
[INFO] [stdout] c2e77dcbea35460e9edb42de076d10794e302105d2eda6498f761d1ba64e218c