[INFO] cloning repository https://github.com/jeffzh4ng/nayru
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeffzh4ng/nayru" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffzh4ng%2Fnayru", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffzh4ng%2Fnayru'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d56d7b78849296d3929b6674e9f249698a05d0eb
[INFO] checking jeffzh4ng/nayru against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffzh4ng%2Fnayru" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeffzh4ng/nayru on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jeffzh4ng/nayru
[INFO] finished tweaking git repo https://github.com/jeffzh4ng/nayru
[INFO] tweaked toml for git repo https://github.com/jeffzh4ng/nayru written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jeffzh4ng/nayru 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7312fbd54f65bfefd39d2d5f68f06df0d0a885f87ea9384fab81cff3da081409
[INFO] running `Command { std: "docker" "start" "-a" "7312fbd54f65bfefd39d2d5f68f06df0d0a885f87ea9384fab81cff3da081409", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7312fbd54f65bfefd39d2d5f68f06df0d0a885f87ea9384fab81cff3da081409", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7312fbd54f65bfefd39d2d5f68f06df0d0a885f87ea9384fab81cff3da081409", kill_on_drop: false }`
[INFO] [stdout] 7312fbd54f65bfefd39d2d5f68f06df0d0a885f87ea9384fab81cff3da081409
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 107992d64dc05afccf03544d39579f50e076155694b0f6da9a8387235bd8e7f3
[INFO] running `Command { std: "docker" "start" "-a" "107992d64dc05afccf03544d39579f50e076155694b0f6da9a8387235bd8e7f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking ordered-float v4.2.0
[INFO] [stderr]     Checking autograd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/engine.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 | /         Expr {
[INFO] [stdout] 39 | |             evaluated,
[INFO] [stdout] 40 | |             expr: Some((Op::Add, operands)),
[INFO] [stdout] 41 | |             grad: todo!(),
[INFO] [stdout]    | |                   ------- any code following this expression is unreachable
[INFO] [stdout] 42 | |         }
[INFO] [stdout]    | |_________^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/engine.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 | /         Expr {
[INFO] [stdout] 39 | |             evaluated,
[INFO] [stdout] 40 | |             expr: Some((Op::Add, operands)),
[INFO] [stdout] 41 | |             grad: todo!(),
[INFO] [stdout]    | |                   ------- any code following this expression is unreachable
[INFO] [stdout] 42 | |         }
[INFO] [stdout]    | |_________^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/engine.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 | /         Expr {
[INFO] [stdout] 56 | |             evaluated,
[INFO] [stdout] 57 | |             expr: Some((Op::Mul, operands)),
[INFO] [stdout] 58 | |             grad: todo!(),
[INFO] [stdout]    | |                   ------- any code following this expression is unreachable
[INFO] [stdout] 59 | |         }
[INFO] [stdout]    | |_________^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/engine.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 | /         Expr {
[INFO] [stdout] 56 | |             evaluated,
[INFO] [stdout] 57 | |             expr: Some((Op::Mul, operands)),
[INFO] [stdout] 58 | |             grad: todo!(),
[INFO] [stdout]    | |                   ------- any code following this expression is unreachable
[INFO] [stdout] 59 | |         }
[INFO] [stdout]    | |_________^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `autograd::engine::Expr`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use autograd::engine::Expr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ordered_float::NotNan`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ordered_float::NotNan;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `autograd::engine::Expr`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use autograd::engine::Expr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ordered_float::NotNan`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ordered_float::NotNan;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `Command { std: "docker" "inspect" "107992d64dc05afccf03544d39579f50e076155694b0f6da9a8387235bd8e7f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "107992d64dc05afccf03544d39579f50e076155694b0f6da9a8387235bd8e7f3", kill_on_drop: false }`
[INFO] [stdout] 107992d64dc05afccf03544d39579f50e076155694b0f6da9a8387235bd8e7f3