[INFO] cloning repository https://github.com/dobrakmato/linear-algebra-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dobrakmato/linear-algebra-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdobrakmato%2Flinear-algebra-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdobrakmato%2Flinear-algebra-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1c681f0f23d03f01b686ed74b34352a2cfe87656
[INFO] checking dobrakmato/linear-algebra-rust against master#b56aaec52bc0fa35591a872fb4aac81f606e265c for pr-122661-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdobrakmato%2Flinear-algebra-rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dobrakmato/linear-algebra-rust
[INFO] finished tweaking git repo https://github.com/dobrakmato/linear-algebra-rust
[INFO] tweaked toml for git repo https://github.com/dobrakmato/linear-algebra-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dobrakmato/linear-algebra-rust on toolchain b56aaec52bc0fa35591a872fb4aac81f606e265c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dobrakmato/linear-algebra-rust 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" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1b1ae53d4c63e841fc10df919a84dee47f4ed149e5d6b7def7eae80509db2d0
[INFO] running `Command { std: "docker" "start" "-a" "a1b1ae53d4c63e841fc10df919a84dee47f4ed149e5d6b7def7eae80509db2d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1b1ae53d4c63e841fc10df919a84dee47f4ed149e5d6b7def7eae80509db2d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1b1ae53d4c63e841fc10df919a84dee47f4ed149e5d6b7def7eae80509db2d0", kill_on_drop: false }`
[INFO] [stdout] a1b1ae53d4c63e841fc10df919a84dee47f4ed149e5d6b7def7eae80509db2d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9710063dbcab2543264890b89d20d6fc55c592849546359f09f3d7b85e257136
[INFO] running `Command { std: "docker" "start" "-a" "9710063dbcab2543264890b89d20d6fc55c592849546359f09f3d7b85e257136", kill_on_drop: false }`
[INFO] [stderr]     Checking eaz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `pivot`
[INFO] [stdout]   --> src/gauss.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let pivot = {
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_pivot`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `One` is never used
[INFO] [stdout]   --> src/zero.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub trait One: Sized {
[INFO] [stdout]    |           ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `mul_row` and `swap_rows` are never used
[INFO] [stdout]   --> src/gauss.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl<'a, T> Mat<'a, T> where T: Add + Mul<Output=T> + Copy {
[INFO] [stdout]    | ---------------------------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn mul_row(&mut self, row: usize, f: T) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     pub fn swap_rows(&mut self, row1: usize, row2: usize) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pivot`
[INFO] [stdout]   --> src/gauss.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let pivot = {
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_pivot`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `One` is never used
[INFO] [stdout]   --> src/zero.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub trait One: Sized {
[INFO] [stdout]    |           ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `mul_row` and `swap_rows` are never used
[INFO] [stdout]   --> src/gauss.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl<'a, T> Mat<'a, T> where T: Add + Mul<Output=T> + Copy {
[INFO] [stdout]    | ---------------------------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn mul_row(&mut self, row: usize, f: T) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     pub fn swap_rows(&mut self, row1: usize, row2: usize) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "9710063dbcab2543264890b89d20d6fc55c592849546359f09f3d7b85e257136", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9710063dbcab2543264890b89d20d6fc55c592849546359f09f3d7b85e257136", kill_on_drop: false }`
[INFO] [stdout] 9710063dbcab2543264890b89d20d6fc55c592849546359f09f3d7b85e257136