[INFO] cloning repository https://github.com/ylloc/rust-minigrad
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ylloc/rust-minigrad" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fylloc%2Frust-minigrad", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fylloc%2Frust-minigrad'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 67ff47b52465cbbabb3757b5508bf6ae360ecf14
[INFO] checking ylloc/rust-minigrad against try#5de9e0e6cf775e94e0de2003f35e183f3f77bfe8 for pr-143808
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fylloc%2Frust-minigrad" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ylloc/rust-minigrad
[INFO] finished tweaking git repo https://github.com/ylloc/rust-minigrad
[INFO] tweaked toml for git repo https://github.com/ylloc/rust-minigrad written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ylloc/rust-minigrad on toolchain 5de9e0e6cf775e94e0de2003f35e183f3f77bfe8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ylloc/rust-minigrad 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" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2986d9247ee65ef1b05c926010b24424fa1ed4b8b5fb49f504b5eb10ecfb566
[INFO] running `Command { std: "docker" "start" "-a" "d2986d9247ee65ef1b05c926010b24424fa1ed4b8b5fb49f504b5eb10ecfb566", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2986d9247ee65ef1b05c926010b24424fa1ed4b8b5fb49f504b5eb10ecfb566", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2986d9247ee65ef1b05c926010b24424fa1ed4b8b5fb49f504b5eb10ecfb566", kill_on_drop: false }`
[INFO] [stdout] d2986d9247ee65ef1b05c926010b24424fa1ed4b8b5fb49f504b5eb10ecfb566
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 711482fe0c1f94e2b27cb33bd2b4e057222c3132909aa5ada7a1450d18da89d4
[INFO] running `Command { std: "docker" "start" "-a" "711482fe0c1f94e2b27cb33bd2b4e057222c3132909aa5ada7a1450d18da89d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking auto_ops v0.3.0
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rust_minigrad v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `core_intrinsics` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core_intrinsics)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/variable.rs:218:23
[INFO] [stdout]     |
[INFO] [stdout] 218 |             let val = (x.children[0].borrow_mut().data);
[INFO] [stdout]     |                       ^                               ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 218 -             let val = (x.children[0].borrow_mut().data);
[INFO] [stdout] 218 +             let val = x.children[0].borrow_mut().data;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core_intrinsics` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core_intrinsics)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/variable.rs:218:23
[INFO] [stdout]     |
[INFO] [stdout] 218 |             let val = (x.children[0].borrow_mut().data);
[INFO] [stdout]     |                       ^                               ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 218 -             let val = (x.children[0].borrow_mut().data);
[INFO] [stdout] 218 +             let val = x.children[0].borrow_mut().data;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/tensor.rs:269:21
[INFO] [stdout]     |
[INFO] [stdout] 269 |         let x = self.clone().exp();
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Tensor1D` does not implement `Clone`, so calling `clone` on `&Tensor1D` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 269 -         let x = self.clone().exp();
[INFO] [stdout] 269 +         let x = self.exp();
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Tensor1D`, implement `Clone` for it
[INFO] [stdout]     |
[INFO] [stdout] 7   + #[derive(Clone)]
[INFO] [stdout] 8   | pub struct Tensor1D(pub Rc<RefCell<Vec<Variable>>>, pub usize);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::random`
[INFO] [stdout]  --> tests/test_ops.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::random;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Operation`, `Tensor1D`, `Tensor2D`, `VariableData`, and `Variable`
[INFO] [stdout]  --> tests/test_ops.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rust_minigrad::{Operation, Tensor1D, Tensor2D, Variable, VariableData};
[INFO] [stdout]   |                     ^^^^^^^^^  ^^^^^^^^  ^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Tensor1D`
[INFO] [stdout]  --> tests/test_ops.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use rust_minigrad::{Tensor1D, Variable};
[INFO] [stdout]   |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/tensor.rs:269:21
[INFO] [stdout]     |
[INFO] [stdout] 269 |         let x = self.clone().exp();
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Tensor1D` does not implement `Clone`, so calling `clone` on `&Tensor1D` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 269 -         let x = self.clone().exp();
[INFO] [stdout] 269 +         let x = self.exp();
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Tensor1D`, implement `Clone` for it
[INFO] [stdout]     |
[INFO] [stdout] 7   + #[derive(Clone)]
[INFO] [stdout] 8   | pub struct Tensor1D(pub Rc<RefCell<Vec<Variable>>>, pub usize);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `cnt` is assigned to, but never used
[INFO] [stdout]    --> tests/tensor_test.rs:183:17
[INFO] [stdout]     |
[INFO] [stdout] 183 |         let mut cnt = 1;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_cnt` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> tests/tensor_test.rs:232:13
[INFO] [stdout]     |
[INFO] [stdout] 232 |         let y = x.clone();
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]    --> tests/tensor_test.rs:305:13
[INFO] [stdout]     |
[INFO] [stdout] 305 |         let z = Variable::from(2.) * x;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.50s
[INFO] running `Command { std: "docker" "inspect" "711482fe0c1f94e2b27cb33bd2b4e057222c3132909aa5ada7a1450d18da89d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "711482fe0c1f94e2b27cb33bd2b4e057222c3132909aa5ada7a1450d18da89d4", kill_on_drop: false }`
[INFO] [stdout] 711482fe0c1f94e2b27cb33bd2b4e057222c3132909aa5ada7a1450d18da89d4