[INFO] cloning repository https://github.com/ILoveEggs3/rust_machine_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ILoveEggs3/rust_machine_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FILoveEggs3%2Frust_machine_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FILoveEggs3%2Frust_machine_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7731ccfe5c227303c2aeb65c7f7ed822e8e2eef3
[INFO] checking ILoveEggs3/rust_machine_learning against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FILoveEggs3%2Frust_machine_learning" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ILoveEggs3/rust_machine_learning on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ILoveEggs3/rust_machine_learning
[INFO] finished tweaking git repo https://github.com/ILoveEggs3/rust_machine_learning
[INFO] tweaked toml for git repo https://github.com/ILoveEggs3/rust_machine_learning written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ILoveEggs3/rust_machine_learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4fb5a2df26a8dc3cfdfc248e2145835f804a9d5598f8e1ddb3969ac9400aabb4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4fb5a2df26a8dc3cfdfc248e2145835f804a9d5598f8e1ddb3969ac9400aabb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4fb5a2df26a8dc3cfdfc248e2145835f804a9d5598f8e1ddb3969ac9400aabb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fb5a2df26a8dc3cfdfc248e2145835f804a9d5598f8e1ddb3969ac9400aabb4", kill_on_drop: false }`
[INFO] [stdout] 4fb5a2df26a8dc3cfdfc248e2145835f804a9d5598f8e1ddb3969ac9400aabb4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20cee91f292b90bf5cbb22a2cdf5c55c89842c4f7835efcd65474fdd088145b2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "20cee91f292b90bf5cbb22a2cdf5c55c89842c4f7835efcd65474fdd088145b2", kill_on_drop: false }`
[INFO] [stderr]     Checking machine_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::cmp`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::cmp;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::cmp;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MatrixMatrixMul`, `Matrix`, `Mul`, `PushMultiple`
[INFO] [stdout]    --> src/main.rs:428:17
[INFO] [stdout]     |
[INFO] [stdout] 428 |     use super::{Matrix, MatrixMatrixMul, Mul, PushMultiple};
[INFO] [stdout]     |                 ^^^^^^  ^^^^^^^^^^^^^^^  ^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Mul`
[INFO] [stdout]    --> src/main.rs:428:42
[INFO] [stdout]     |
[INFO] [stdout] 428 |     use super::{Matrix, MatrixMatrixMul, Mul, PushMultiple};
[INFO] [stdout]     |                                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `actual` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:378:9
[INFO] [stdout]     |
[INFO] [stdout] 378 |     let actual;
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_actual` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `actual` is never read
[INFO] [stdout]    --> src/main.rs:383:5
[INFO] [stdout]     |
[INFO] [stdout] 383 |     actual = Matrix::det(&matrix);
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `actual` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:390:9
[INFO] [stdout]     |
[INFO] [stdout] 390 |     let actual;
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_actual` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `actual` is never read
[INFO] [stdout]    --> src/main.rs:395:5
[INFO] [stdout]     |
[INFO] [stdout] 395 |     actual = Matrix::det(&matrix);
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> src/main.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn det(m: &Matrix<T>) -> T {
[INFO] [stdout]    |            ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> src/main.rs:90:12
[INFO] [stdout]    |
[INFO] [stdout] 90 |     fn det(m: &Minor<T>) -> T {
[INFO] [stdout]    |            ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `actual` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:378:9
[INFO] [stdout]     |
[INFO] [stdout] 378 |     let actual;
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_actual` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `actual` is never read
[INFO] [stdout]    --> src/main.rs:383:5
[INFO] [stdout]     |
[INFO] [stdout] 383 |     actual = Matrix::det(&matrix);
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `actual` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:390:9
[INFO] [stdout]     |
[INFO] [stdout] 390 |     let actual;
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_actual` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `actual` is never read
[INFO] [stdout]    --> src/main.rs:395:5
[INFO] [stdout]     |
[INFO] [stdout] 395 |     actual = Matrix::det(&matrix);
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> src/main.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn det(m: &Matrix<T>) -> T {
[INFO] [stdout]    |            ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> src/main.rs:90:12
[INFO] [stdout]    |
[INFO] [stdout] 90 |     fn det(m: &Minor<T>) -> T {
[INFO] [stdout]    |            ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `SquaredMatrix`
[INFO] [stdout]   --> src/main.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct SquaredMatrix<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `question_photo_main`
[INFO] [stdout]    --> src/main.rs:571:12
[INFO] [stdout]     |
[INFO] [stdout] 571 |     pub fn question_photo_main() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/main.rs:622:12
[INFO] [stdout]     |
[INFO] [stdout] 622 |         fn new(m: u32, n: u32) -> Summation<T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `M` should have a snake case name
[INFO] [stdout]   --> src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     M: usize,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case: `m`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `N` should have a snake case name
[INFO] [stdout]   --> src/main.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     N: usize,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `SquaredMatrix`
[INFO] [stdout]   --> src/main.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct SquaredMatrix<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `question_photo_main`
[INFO] [stdout]    --> src/main.rs:571:12
[INFO] [stdout]     |
[INFO] [stdout] 571 |     pub fn question_photo_main() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/main.rs:622:12
[INFO] [stdout]     |
[INFO] [stdout] 622 |         fn new(m: u32, n: u32) -> Summation<T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `M` should have a snake case name
[INFO] [stdout]   --> src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     M: usize,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case: `m`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `N` should have a snake case name
[INFO] [stdout]   --> src/main.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     N: usize,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "20cee91f292b90bf5cbb22a2cdf5c55c89842c4f7835efcd65474fdd088145b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20cee91f292b90bf5cbb22a2cdf5c55c89842c4f7835efcd65474fdd088145b2", kill_on_drop: false }`
[INFO] [stdout] 20cee91f292b90bf5cbb22a2cdf5c55c89842c4f7835efcd65474fdd088145b2