[INFO] cloning repository https://github.com/snctfd/gausselim-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/snctfd/gausselim-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsnctfd%2Fgausselim-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsnctfd%2Fgausselim-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6310d4df3cb1c73f5d422e51c052d54a5a11ef6
[INFO] checking snctfd/gausselim-rs against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsnctfd%2Fgausselim-rs" "/workspace/builds/worker-106/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-106/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/snctfd/gausselim-rs on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/snctfd/gausselim-rs
[INFO] finished tweaking git repo https://github.com/snctfd/gausselim-rs
[INFO] tweaked toml for git repo https://github.com/snctfd/gausselim-rs written to /workspace/builds/worker-106/source/Cargo.toml
[INFO] crate git repo https://github.com/snctfd/gausselim-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41d476724bcf5e623845146c2009b7a28616dc26c779080c6f57a990014cb9ce
[INFO] running `Command { std: "docker" "start" "-a" "41d476724bcf5e623845146c2009b7a28616dc26c779080c6f57a990014cb9ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41d476724bcf5e623845146c2009b7a28616dc26c779080c6f57a990014cb9ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41d476724bcf5e623845146c2009b7a28616dc26c779080c6f57a990014cb9ce", kill_on_drop: false }`
[INFO] [stdout] 41d476724bcf5e623845146c2009b7a28616dc26c779080c6f57a990014cb9ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cb82603a5eb352ad6b9f8c6ab329f31438fe3a63b5e8d3abe62a1ecc68de5e9
[INFO] running `Command { std: "docker" "start" "-a" "6cb82603a5eb352ad6b9f8c6ab329f31438fe3a63b5e8d3abe62a1ecc68de5e9", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking gausselim v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/main.rs (2 fixes)
[INFO] [stderr]        Fixed src/matrix.rs (1 fix)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/matrix.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn new(contents: Vec<f32>, rows: usize, cols: usize) -> Matrix {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `swap_rows`
[INFO] [stdout]   --> src/matrix.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn swap_rows(&mut self, i: usize, j: usize) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mult_row`
[INFO] [stdout]   --> src/matrix.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn mult_row(&mut self, row: usize, val: f32) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_row`
[INFO] [stdout]   --> src/matrix.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn add_row(&mut self, to: usize, from: usize) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_matrix`
[INFO] [stdout]  --> src/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn read_matrix(reader: &mut dyn Read) -> Result<Matrix, Box<dyn Error>> {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.39s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking gausselim v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/matrix.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn new(contents: Vec<f32>, rows: usize, cols: usize) -> Matrix {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `swap_rows`
[INFO] [stdout]   --> src/matrix.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn swap_rows(&mut self, i: usize, j: usize) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mult_row`
[INFO] [stdout]   --> src/matrix.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn mult_row(&mut self, row: usize, val: f32) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_row`
[INFO] [stdout]   --> src/matrix.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn add_row(&mut self, to: usize, from: usize) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_matrix`
[INFO] [stdout]  --> src/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn read_matrix(reader: &mut dyn Read) -> Result<Matrix, Box<dyn Error>> {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `Command { std: "docker" "inspect" "6cb82603a5eb352ad6b9f8c6ab329f31438fe3a63b5e8d3abe62a1ecc68de5e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cb82603a5eb352ad6b9f8c6ab329f31438fe3a63b5e8d3abe62a1ecc68de5e9", kill_on_drop: false }`
[INFO] [stdout] 6cb82603a5eb352ad6b9f8c6ab329f31438fe3a63b5e8d3abe62a1ecc68de5e9