[INFO] fetching crate ugrad 0.1.0...
[INFO] checking ugrad-0.1.0 against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] extracting crate ugrad 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate ugrad 0.1.0 on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ugrad 0.1.0
[INFO] finished tweaking crates.io crate ugrad 0.1.0
[INFO] tweaked toml for crates.io crate ugrad 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate ugrad 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" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e019922a271e2eb8b24178a8ddebbc62bd3be19f0680ad23b925f5609325c4e6
[INFO] running `Command { std: "docker" "start" "-a" "e019922a271e2eb8b24178a8ddebbc62bd3be19f0680ad23b925f5609325c4e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e019922a271e2eb8b24178a8ddebbc62bd3be19f0680ad23b925f5609325c4e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e019922a271e2eb8b24178a8ddebbc62bd3be19f0680ad23b925f5609325c4e6", kill_on_drop: false }`
[INFO] [stdout] e019922a271e2eb8b24178a8ddebbc62bd3be19f0680ad23b925f5609325c4e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81b948bcb57f4dfdead3fe708a4ea0d762fcc0c2d083ce865f1bc06b531b3162
[INFO] running `Command { std: "docker" "start" "-a" "81b948bcb57f4dfdead3fe708a4ea0d762fcc0c2d083ce865f1bc06b531b3162", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
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[INFO] [stderr]     Checking ugrad v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(box_syntax)]
[INFO] [stdout]   |            ^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: replaced with `#[rustc_box]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(box_syntax)]
[INFO] [stdout]   |            ^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: replaced with `#[rustc_box]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> examples/mnist.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> examples/mnist.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let y = ndarray::ArcArray::from_shape_vec([50_000, 1], MNIST.trn_lbl.clone()).unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ShapeBuilder`, `StrideShape`
[INFO] [stdout]  --> src/back/wgpu.rs:3:32
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ndarray::{ArcArray, IxDyn, ShapeBuilder, StrideShape};
[INFO] [stdout]   |                                ^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BinOp`, `RedOp`, `UnOp`
[INFO] [stdout]  --> src/eval/mod.rs:2:18
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::ten::{BinOp, ParamId, RedOp, Shape, Tensor, TensorOps, UnOp};
[INFO] [stdout]   |                  ^^^^^           ^^^^^                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ArrayD`
[INFO] [stdout]  --> src/eval/mod.rs:4:36
[INFO] [stdout]   |
[INFO] [stdout] 4 | use ndarray::{ArcArray, ArrayBase, ArrayD, IxDyn, OwnedArcRepr};
[INFO] [stdout]   |                                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `defer::defer`
[INFO] [stdout]  --> src/optim/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use defer::defer;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufferT`
[INFO] [stdout]  --> src/optim/mod.rs:2:28
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::back::{Backend, BufferT};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ndarray::IxDyn`
[INFO] [stdout]  --> src/ten/ops.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ndarray::IxDyn;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AddAssign`, `Add`, `BitAndAssign`, `BitAnd`, `BitOrAssign`, `BitOr`, `DivAssign`, `Div`, `Index`, `MulAssign`, `Mul`, `Neg`, `RangeBounds`, `SubAssign`, `Sub`
[INFO] [stdout]   --> src/ten/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Add, AddAssign, BitAnd, BitAndAssign, BitOr, BitOrAssign, Div, DivAssign, Index, Mul,
[INFO] [stdout]    |     ^^^  ^^^^^^^^^  ^^^^^^  ^^^^^^^^^^^^  ^^^^^  ^^^^^^^^^^^  ^^^  ^^^^^^^^^  ^^^^^  ^^^
[INFO] [stdout] 14 |     MulAssign, Neg, RangeBounds, Sub, SubAssign,
[INFO] [stdout]    |     ^^^^^^^^^  ^^^  ^^^^^^^^^^^  ^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Backend`
[INFO] [stdout]   --> src/main.rs:11:38
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::back::{wgpu::WgpuBackend, Backend, BufferT};
[INFO] [stdout]    |                                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Optimizer`, `SGD`
[INFO] [stdout]   --> src/main.rs:13:20
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::optim::{Optimizer, SGD};
[INFO] [stdout]    |                    ^^^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Axis`, `StrideShape`
[INFO] [stdout]   --> src/main.rs:15:15
[INFO] [stdout]    |
[INFO] [stdout] 15 | use ndarray::{Axis, StrideShape};
[INFO] [stdout]    |               ^^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use rand::Rng;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::fmt::Debug;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BuildHasher`, `Hash`, `Hasher`
[INFO] [stdout]   --> src/main.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::hash::{BuildHasher, Hash, Hasher};
[INFO] [stdout]    |                 ^^^^^^^^^^^  ^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Add`, `DerefMut`, `Mul`, `Neg`
[INFO] [stdout]   --> src/main.rs:19:16
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::ops::{Add, DerefMut, Mul, Neg};
[INFO] [stdout]    |                ^^^  ^^^^^^^^  ^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ShapeBuilder`, `StrideShape`
[INFO] [stdout]  --> src/back/wgpu.rs:3:32
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ndarray::{ArcArray, IxDyn, ShapeBuilder, StrideShape};
[INFO] [stdout]   |                                ^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BinOp`, `RedOp`, `UnOp`
[INFO] [stdout]  --> src/eval/mod.rs:2:18
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::ten::{BinOp, ParamId, RedOp, Shape, Tensor, TensorOps, UnOp};
[INFO] [stdout]   |                  ^^^^^           ^^^^^                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ArrayD`
[INFO] [stdout]  --> src/eval/mod.rs:4:36
[INFO] [stdout]   |
[INFO] [stdout] 4 | use ndarray::{ArcArray, ArrayBase, ArrayD, IxDyn, OwnedArcRepr};
[INFO] [stdout]   |                                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `defer::defer`
[INFO] [stdout]  --> src/optim/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use defer::defer;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufferT`
[INFO] [stdout]  --> src/optim/mod.rs:2:28
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::back::{Backend, BufferT};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ndarray::IxDyn`
[INFO] [stdout]  --> src/ten/ops.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ndarray::IxDyn;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AddAssign`, `Add`, `BitAndAssign`, `BitAnd`, `BitOrAssign`, `BitOr`, `DivAssign`, `Div`, `Index`, `MulAssign`, `Mul`, `Neg`, `RangeBounds`, `SubAssign`, `Sub`
[INFO] [stdout]   --> src/ten/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Add, AddAssign, BitAnd, BitAndAssign, BitOr, BitOrAssign, Div, DivAssign, Index, Mul,
[INFO] [stdout]    |     ^^^  ^^^^^^^^^  ^^^^^^  ^^^^^^^^^^^^  ^^^^^  ^^^^^^^^^^^  ^^^  ^^^^^^^^^  ^^^^^  ^^^
[INFO] [stdout] 14 |     MulAssign, Neg, RangeBounds, Sub, SubAssign,
[INFO] [stdout]    |     ^^^^^^^^^  ^^^  ^^^^^^^^^^^  ^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Backend`
[INFO] [stdout]   --> src/main.rs:11:38
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::back::{wgpu::WgpuBackend, Backend, BufferT};
[INFO] [stdout]    |                                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Optimizer`, `SGD`
[INFO] [stdout]   --> src/main.rs:13:20
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::optim::{Optimizer, SGD};
[INFO] [stdout]    |                    ^^^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Axis`, `StrideShape`
[INFO] [stdout]   --> src/main.rs:15:15
[INFO] [stdout]    |
[INFO] [stdout] 15 | use ndarray::{Axis, StrideShape};
[INFO] [stdout]    |               ^^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use rand::Rng;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::fmt::Debug;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BuildHasher`, `Hash`, `Hasher`
[INFO] [stdout]   --> src/main.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::hash::{BuildHasher, Hash, Hasher};
[INFO] [stdout]    |                 ^^^^^^^^^^^  ^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Add`, `DerefMut`, `Mul`, `Neg`
[INFO] [stdout]   --> src/main.rs:19:16
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::ops::{Add, DerefMut, Mul, Neg};
[INFO] [stdout]    |                ^^^  ^^^^^^^^  ^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufferT`
[INFO] [stdout]   --> src/main.rs:11:47
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::back::{wgpu::WgpuBackend, Backend, BufferT};
[INFO] [stdout]    |                                               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufferT`
[INFO] [stdout]   --> src/main.rs:11:47
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::back::{wgpu::WgpuBackend, Backend, BufferT};
[INFO] [stdout]    |                                               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ugrad` (bin "ugrad") due to 2 previous errors; 15 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `ugrad` (bin "ugrad" test) due to 2 previous errors; 15 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "81b948bcb57f4dfdead3fe708a4ea0d762fcc0c2d083ce865f1bc06b531b3162", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81b948bcb57f4dfdead3fe708a4ea0d762fcc0c2d083ce865f1bc06b531b3162", kill_on_drop: false }`
[INFO] [stdout] 81b948bcb57f4dfdead3fe708a4ea0d762fcc0c2d083ce865f1bc06b531b3162
