[INFO] cloning repository https://github.com/psykomal/micrograd-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/psykomal/micrograd-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsykomal%2Fmicrograd-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsykomal%2Fmicrograd-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4b1ff1ea246543bb43c344a01034f3ea16b80975
[INFO] building psykomal/micrograd-rs 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%2Fpsykomal%2Fmicrograd-rs" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/psykomal/micrograd-rs 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/psykomal/micrograd-rs
[INFO] finished tweaking git repo https://github.com/psykomal/micrograd-rs
[INFO] tweaked toml for git repo https://github.com/psykomal/micrograd-rs written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/psykomal/micrograd-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] aef7c916bfe3bd35bb9dd524e191b33fd25b9569077d3f6d6f2977d5c19aeeec
[INFO] running `Command { std: "docker" "start" "-a" "aef7c916bfe3bd35bb9dd524e191b33fd25b9569077d3f6d6f2977d5c19aeeec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aef7c916bfe3bd35bb9dd524e191b33fd25b9569077d3f6d6f2977d5c19aeeec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aef7c916bfe3bd35bb9dd524e191b33fd25b9569077d3f6d6f2977d5c19aeeec", kill_on_drop: false }`
[INFO] [stdout] aef7c916bfe3bd35bb9dd524e191b33fd25b9569077d3f6d6f2977d5c19aeeec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 4f5f26c532ce596cfcf6a4eb00defc1927d65320b939b5578df1c252ac478a76
[INFO] running `Command { std: "docker" "start" "-a" "4f5f26c532ce596cfcf6a4eb00defc1927d65320b939b5578df1c252ac478a76", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[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 micrograd-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Op`
[INFO] [stdout]  --> src/main.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 | use micrograd_rs::engine::{Op, Value};
[INFO] [stdout]   |                            ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Layer` and `Neuron`
[INFO] [stdout]  --> src/main.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | use micrograd_rs::nn::{Layer, Neuron, ZeroGrad, MLP};
[INFO] [stdout]   |                        ^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.08s
[INFO] running `Command { std: "docker" "inspect" "4f5f26c532ce596cfcf6a4eb00defc1927d65320b939b5578df1c252ac478a76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f5f26c532ce596cfcf6a4eb00defc1927d65320b939b5578df1c252ac478a76", kill_on_drop: false }`
[INFO] [stdout] 4f5f26c532ce596cfcf6a4eb00defc1927d65320b939b5578df1c252ac478a76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 16655317aa05f30d74e718d1b7c2e115bb21500cdd38a7f584c6f89c87ea4a9b
[INFO] running `Command { std: "docker" "start" "-a" "16655317aa05f30d74e718d1b7c2e115bb21500cdd38a7f584c6f89c87ea4a9b", kill_on_drop: false }`
[INFO] [stderr]    Compiling micrograd-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Op`
[INFO] [stdout]  --> src/main.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 | use micrograd_rs::engine::{Op, Value};
[INFO] [stdout]   |                            ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Layer` and `Neuron`
[INFO] [stdout]  --> src/main.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | use micrograd_rs::nn::{Layer, Neuron, ZeroGrad, MLP};
[INFO] [stdout]   |                        ^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "16655317aa05f30d74e718d1b7c2e115bb21500cdd38a7f584c6f89c87ea4a9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16655317aa05f30d74e718d1b7c2e115bb21500cdd38a7f584c6f89c87ea4a9b", kill_on_drop: false }`
[INFO] [stdout] 16655317aa05f30d74e718d1b7c2e115bb21500cdd38a7f584c6f89c87ea4a9b