[INFO] cloning repository https://github.com/system125/matrix
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/system125/matrix" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsystem125%2Fmatrix", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsystem125%2Fmatrix'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 31e544fd18ad6d618ead45eabf47524dddfa0243
[INFO] testing system125/matrix against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsystem125%2Fmatrix" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/system125/matrix
[INFO] finished tweaking git repo https://github.com/system125/matrix
[INFO] tweaked toml for git repo https://github.com/system125/matrix written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/system125/matrix on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/system125/matrix 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cde91a54181f3c428f74ea15836be4749b08ce9b85cd19dea684403b6c934d6f
[INFO] running `Command { std: "docker" "start" "-a" "cde91a54181f3c428f74ea15836be4749b08ce9b85cd19dea684403b6c934d6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cde91a54181f3c428f74ea15836be4749b08ce9b85cd19dea684403b6c934d6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cde91a54181f3c428f74ea15836be4749b08ce9b85cd19dea684403b6c934d6f", kill_on_drop: false }`
[INFO] [stdout] cde91a54181f3c428f74ea15836be4749b08ce9b85cd19dea684403b6c934d6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4b4f17027456d0b00b4028f3c1687f034e2810551a486711e7d6cad20a1b64a
[INFO] running `Command { std: "docker" "start" "-a" "f4b4f17027456d0b00b4028f3c1687f034e2810551a486711e7d6cad20a1b64a", kill_on_drop: false }`
[INFO] [stderr]    Compiling matrix v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/matrix/matrix.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::option::Iter`
[INFO] [stdout]  --> src/matrix/matrix.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::option::Iter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `matrix_row_iter` should have an upper camel case name
[INFO] [stdout]  --> src/matrix/matrix_row_iter.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct matrix_row_iter<'a> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `MatrixRowIter`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mat`
[INFO] [stdout]   --> src/matrix/matrix_row_iter.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let mat = &self.matrix.values;
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_mat`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]   --> src/matrix/matrix_row_iter.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let height = self.matrix.height;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `to_iter` and `to_mut_iter` are never used
[INFO] [stdout]   --> src/matrix/matrix.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Matrix {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub fn to_iter(&self)-> impl Iterator<Item = &i32> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn to_mut_iter(&mut self) -> impl Iterator<Item = &mut i32>{
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mat_A` should have a snake case name
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mat_A = Matrix::from(
[INFO] [stdout]   |         ^^^^^ help: convert the identifier to snake case: `mat_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "f4b4f17027456d0b00b4028f3c1687f034e2810551a486711e7d6cad20a1b64a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4b4f17027456d0b00b4028f3c1687f034e2810551a486711e7d6cad20a1b64a", kill_on_drop: false }`
[INFO] [stdout] f4b4f17027456d0b00b4028f3c1687f034e2810551a486711e7d6cad20a1b64a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56f365269d5d86509613d53ba2e51534d6a46a974a7fad924bf5a6a806838f40
[INFO] running `Command { std: "docker" "start" "-a" "56f365269d5d86509613d53ba2e51534d6a46a974a7fad924bf5a6a806838f40", kill_on_drop: false }`
[INFO] [stderr]    Compiling matrix v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/matrix/matrix.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::option::Iter`
[INFO] [stdout]  --> src/matrix/matrix.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::option::Iter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `matrix_row_iter` should have an upper camel case name
[INFO] [stdout]  --> src/matrix/matrix_row_iter.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct matrix_row_iter<'a> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `MatrixRowIter`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mat`
[INFO] [stdout]   --> src/matrix/matrix_row_iter.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let mat = &self.matrix.values;
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_mat`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]   --> src/matrix/matrix_row_iter.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let height = self.matrix.height;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `to_iter` and `to_mut_iter` are never used
[INFO] [stdout]   --> src/matrix/matrix.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Matrix {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub fn to_iter(&self)-> impl Iterator<Item = &i32> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn to_mut_iter(&mut self) -> impl Iterator<Item = &mut i32>{
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mat_A` should have a snake case name
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mat_A = Matrix::from(
[INFO] [stdout]   |         ^^^^^ help: convert the identifier to snake case: `mat_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "56f365269d5d86509613d53ba2e51534d6a46a974a7fad924bf5a6a806838f40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56f365269d5d86509613d53ba2e51534d6a46a974a7fad924bf5a6a806838f40", kill_on_drop: false }`
[INFO] [stdout] 56f365269d5d86509613d53ba2e51534d6a46a974a7fad924bf5a6a806838f40
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b6203e693260fcc8a98faf5da73036fdb688805938c6feed1238610b4499de10
[INFO] running `Command { std: "docker" "start" "-a" "b6203e693260fcc8a98faf5da73036fdb688805938c6feed1238610b4499de10", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/matrix/matrix.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::option::Iter`
[INFO] [stderr]  --> src/matrix/matrix.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::option::Iter;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `matrix_row_iter` should have an upper camel case name
[INFO] [stderr]  --> src/matrix/matrix_row_iter.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct matrix_row_iter<'a> {
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `MatrixRowIter`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mat`
[INFO] [stderr]   --> src/matrix/matrix_row_iter.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let mat = &self.matrix.values;
[INFO] [stderr]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_mat`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `height`
[INFO] [stderr]   --> src/matrix/matrix_row_iter.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let height = self.matrix.height;
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stderr] 
[INFO] [stderr] warning: methods `to_iter` and `to_mut_iter` are never used
[INFO] [stderr]   --> src/matrix/matrix.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 15 | impl Matrix {
[INFO] [stderr]    | ----------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 27 |     pub fn to_iter(&self)-> impl Iterator<Item = &i32> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 30 |     pub fn to_mut_iter(&mut self) -> impl Iterator<Item = &mut i32>{
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `mat_A` should have a snake case name
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mat_A = Matrix::from(
[INFO] [stderr]   |         ^^^^^ help: convert the identifier to snake case: `mat_a`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `matrix` (bin "matrix" test) generated 7 warnings (run `cargo fix --bin "matrix" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/matrix-51c23b5d24b3ff8d)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b6203e693260fcc8a98faf5da73036fdb688805938c6feed1238610b4499de10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6203e693260fcc8a98faf5da73036fdb688805938c6feed1238610b4499de10", kill_on_drop: false }`
[INFO] [stdout] b6203e693260fcc8a98faf5da73036fdb688805938c6feed1238610b4499de10