[INFO] cloning repository https://github.com/chloro-pn/matrix-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chloro-pn/matrix-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchloro-pn%2Fmatrix-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchloro-pn%2Fmatrix-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9bc0dcb57a41864d36c175e687309b91845b54ae
[INFO] checking chloro-pn/matrix-rs against master#36b21637e93b038453924d3c66821089e71d8baa for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchloro-pn%2Fmatrix-rs" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/chloro-pn/matrix-rs
[INFO] finished tweaking git repo https://github.com/chloro-pn/matrix-rs
[INFO] tweaked toml for git repo https://github.com/chloro-pn/matrix-rs written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/chloro-pn/matrix-rs on toolchain 36b21637e93b038453924d3c66821089e71d8baa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/chloro-pn/matrix-rs 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" "+36b21637e93b038453924d3c66821089e71d8baa" "fetch" "--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-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ba3d8d030e29b5f125812c4e820dae5db59e3fcecbbbe37d021981913ab1fde
[INFO] running `Command { std: "docker" "start" "-a" "2ba3d8d030e29b5f125812c4e820dae5db59e3fcecbbbe37d021981913ab1fde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ba3d8d030e29b5f125812c4e820dae5db59e3fcecbbbe37d021981913ab1fde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ba3d8d030e29b5f125812c4e820dae5db59e3fcecbbbe37d021981913ab1fde", kill_on_drop: false }`
[INFO] [stdout] 2ba3d8d030e29b5f125812c4e820dae5db59e3fcecbbbe37d021981913ab1fde
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+36b21637e93b038453924d3c66821089e71d8baa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b6850c4da3e9302884f27e78aad6ba1f37f00802c4c6e63e4f298fb4aae420ae
[INFO] running `Command { std: "docker" "start" "-a" "b6850c4da3e9302884f27e78aad6ba1f37f00802c4c6e63e4f298fb4aae420ae", kill_on_drop: false }`
[INFO] [stderr]     Checking matrix v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/sparse_matrix.rs:173:21
[INFO] [stdout]     |
[INFO] [stdout] 173 |         if let Some(mut item) = the_item {
[INFO] [stdout]     |                     ----^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/sparse_matrix.rs:186:21
[INFO] [stdout]     |
[INFO] [stdout] 186 |         if let Some(mut item) = the_item {
[INFO] [stdout]     |                     ----^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/sparse_matrix.rs:173:21
[INFO] [stdout]     |
[INFO] [stdout] 173 |         if let Some(mut item) = the_item {
[INFO] [stdout]     |                     ----^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/sparse_matrix.rs:186:21
[INFO] [stdout]     |
[INFO] [stdout] 186 |         if let Some(mut item) = the_item {
[INFO] [stdout]     |                     ----^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_nth_column` is never used
[INFO] [stdout]    --> src/dense_matrix.rs:135:12
[INFO] [stdout]     |
[INFO] [stdout] 133 | impl<T : Clone> DenseMatrix<T> {
[INFO] [stdout]     | ------------------------------ method in this implementation
[INFO] [stdout] 134 |     #[warn(dead_code)]
[INFO] [stdout] 135 |     pub fn set_nth_column(self : &mut Self, col : usize, v : Vector<T>) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/dense_matrix.rs:134:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     #[warn(dead_code)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_sub_matrix` is never used
[INFO] [stdout]   --> src/matrix_base.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait ConstMatrix<T> {
[INFO] [stdout]    |           ----------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 36 |     fn get_sub_matrix(&self, row_begin : usize, row : usize, col_begin : usize, col : usize) -> Self;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_from_matrix` is never used
[INFO] [stdout]   --> src/matrix_base.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub trait Matrix<T : Mul<Output = T> + Group<T> + PartialEq + Clone> : MatrixInit<T> + ConstMatrix<T> + Clone + Sized {
[INFO] [stdout]    |           ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn set_from_matrix<T2 : ConstMatrix<T>>(self : &mut Self, row_begin : usize, col_begin : usize, m : &T2) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_with` is never used
[INFO] [stdout]   --> src/vector.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl<T : Clone> Vector<T> {
[INFO] [stdout]    | ------------------------- associated function in this implementation
[INFO] [stdout] 37 |     #[warn(dead_code)]
[INFO] [stdout] 38 |     pub fn new_with(length : usize, value : T) -> Vector<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/vector.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     #[warn(dead_code)]
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_nth_column` is never used
[INFO] [stdout]    --> src/dense_matrix.rs:135:12
[INFO] [stdout]     |
[INFO] [stdout] 133 | impl<T : Clone> DenseMatrix<T> {
[INFO] [stdout]     | ------------------------------ method in this implementation
[INFO] [stdout] 134 |     #[warn(dead_code)]
[INFO] [stdout] 135 |     pub fn set_nth_column(self : &mut Self, col : usize, v : Vector<T>) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/dense_matrix.rs:134:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     #[warn(dead_code)]
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_sub_matrix` is never used
[INFO] [stdout]   --> src/matrix_base.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait ConstMatrix<T> {
[INFO] [stdout]    |           ----------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 36 |     fn get_sub_matrix(&self, row_begin : usize, row : usize, col_begin : usize, col : usize) -> Self;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_from_matrix` is never used
[INFO] [stdout]   --> src/matrix_base.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub trait Matrix<T : Mul<Output = T> + Group<T> + PartialEq + Clone> : MatrixInit<T> + ConstMatrix<T> + Clone + Sized {
[INFO] [stdout]    |           ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn set_from_matrix<T2 : ConstMatrix<T>>(self : &mut Self, row_begin : usize, col_begin : usize, m : &T2) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "b6850c4da3e9302884f27e78aad6ba1f37f00802c4c6e63e4f298fb4aae420ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6850c4da3e9302884f27e78aad6ba1f37f00802c4c6e63e4f298fb4aae420ae", kill_on_drop: false }`
[INFO] [stdout] b6850c4da3e9302884f27e78aad6ba1f37f00802c4c6e63e4f298fb4aae420ae
