[INFO] cloning repository https://github.com/eightfx/Reed_Solomon_Coding_by_Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eightfx/Reed_Solomon_Coding_by_Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feightfx%2FReed_Solomon_Coding_by_Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feightfx%2FReed_Solomon_Coding_by_Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff6519ac194863f8f53ffaf604d69d61f23474bf
[INFO] checking eightfx/Reed_Solomon_Coding_by_Rust against try#14e4661efa5acbf985e4fe564baae04683366cc1 for pr-157696
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feightfx%2FReed_Solomon_Coding_by_Rust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/eightfx/Reed_Solomon_Coding_by_Rust
[INFO] finished tweaking git repo https://github.com/eightfx/Reed_Solomon_Coding_by_Rust
[INFO] tweaked toml for git repo https://github.com/eightfx/Reed_Solomon_Coding_by_Rust written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/eightfx/Reed_Solomon_Coding_by_Rust on toolchain 14e4661efa5acbf985e4fe564baae04683366cc1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/eightfx/Reed_Solomon_Coding_by_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" "+14e4661efa5acbf985e4fe564baae04683366cc1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] eb544f698cc1fc6d3ca0cf4b10fc4d5c25bfd1546b2cd8e66332b259131779d5
[INFO] running `Command { std: "docker" "start" "eb544f698cc1fc6d3ca0cf4b10fc4d5c25bfd1546b2cd8e66332b259131779d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "eb544f698cc1fc6d3ca0cf4b10fc4d5c25bfd1546b2cd8e66332b259131779d5" "/opt/rustwide/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb544f698cc1fc6d3ca0cf4b10fc4d5c25bfd1546b2cd8e66332b259131779d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "eb544f698cc1fc6d3ca0cf4b10fc4d5c25bfd1546b2cd8e66332b259131779d5" "/opt/rustwide/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling libc v0.2.135
[INFO] [stderr]     Checking galois_field v0.1.9
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking reed_solomon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:144:7
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let mut origin_P_i = P.coef[i].clone();
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:154:7
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let mut origin_P_i = P.coef[i].clone();
[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/main.rs:193:6
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let mut Q0:Polynomial = Polynomial{
[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/main.rs:196:6
[INFO] [stdout]     |
[INFO] [stdout] 196 |     let mut Q1:Polynomial = Polynomial{
[INFO] [stdout]     |         ----^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:75:6
[INFO] [stdout]    |
[INFO] [stdout] 75 |     for i in 0..char - 1 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matrix_visualize` is never used
[INFO] [stdout]   --> src/main.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn matrix_visualize(matrix: Matrix) -> Vec<Vec<i64>> {
[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 `P_vec` should have a snake case name
[INFO] [stdout]   --> src/main.rs:74:10
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let mut P_vec:Vec<FiniteField> = Vec::new();
[INFO] [stdout]    |             ^^^^^ help: convert the identifier to snake case: `p_vec`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `P` should have a snake case name
[INFO] [stdout]   --> src/main.rs:79:6
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let P:Polynomial = Polynomial{
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]    --> src/main.rs:138:10
[INFO] [stdout]     |
[INFO] [stdout] 138 |     let mut H:Matrix = Matrix{
[INFO] [stdout]     |             ^ help: convert the identifier to snake case: `h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `P_i` should have a snake case name
[INFO] [stdout]    --> src/main.rs:143:11
[INFO] [stdout]     |
[INFO] [stdout] 143 |         let mut P_i = P.coef[i].clone();
[INFO] [stdout]     |                 ^^^ help: convert the identifier to snake case: `p_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `origin_P_i` should have a snake case name
[INFO] [stdout]    --> src/main.rs:144:11
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let mut origin_P_i = P.coef[i].clone();
[INFO] [stdout]     |                 ^^^^^^^^^^ help: convert the identifier to snake case: `origin_p_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `P_i` should have a snake case name
[INFO] [stdout]    --> src/main.rs:153:11
[INFO] [stdout]     |
[INFO] [stdout] 153 |         let mut P_i = P.coef[i].clone();
[INFO] [stdout]     |                 ^^^ help: convert the identifier to snake case: `p_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `origin_P_i` should have a snake case name
[INFO] [stdout]    --> src/main.rs:154:11
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let mut origin_P_i = P.coef[i].clone();
[INFO] [stdout]     |                 ^^^^^^^^^^ help: convert the identifier to snake case: `origin_p_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Q` should have a snake case name
[INFO] [stdout]    --> src/main.rs:177:10
[INFO] [stdout]     |
[INFO] [stdout] 177 |     let mut Q:Polynomial = Polynomial{
[INFO] [stdout]     |             ^ help: convert the identifier to snake case: `q`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Q0` should have a snake case name
[INFO] [stdout]    --> src/main.rs:193:10
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let mut Q0:Polynomial = Polynomial{
[INFO] [stdout]     |             ^^ help: convert the identifier to snake case: `q0`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Q1` should have a snake case name
[INFO] [stdout]    --> src/main.rs:196:10
[INFO] [stdout]     |
[INFO] [stdout] 196 |     let mut Q1:Polynomial = Polynomial{
[INFO] [stdout]     |             ^^ help: convert the identifier to snake case: `q1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:144:7
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let mut origin_P_i = P.coef[i].clone();
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:154:7
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let mut origin_P_i = P.coef[i].clone();
[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/main.rs:193:6
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let mut Q0:Polynomial = Polynomial{
[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/main.rs:196:6
[INFO] [stdout]     |
[INFO] [stdout] 196 |     let mut Q1:Polynomial = Polynomial{
[INFO] [stdout]     |         ----^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:75:6
[INFO] [stdout]    |
[INFO] [stdout] 75 |     for i in 0..char - 1 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matrix_visualize` is never used
[INFO] [stdout]   --> src/main.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn matrix_visualize(matrix: Matrix) -> Vec<Vec<i64>> {
[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 `P_vec` should have a snake case name
[INFO] [stdout]   --> src/main.rs:74:10
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let mut P_vec:Vec<FiniteField> = Vec::new();
[INFO] [stdout]    |             ^^^^^ help: convert the identifier to snake case: `p_vec`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `P` should have a snake case name
[INFO] [stdout]   --> src/main.rs:79:6
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let P:Polynomial = Polynomial{
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `H` should have a snake case name
[INFO] [stdout]    --> src/main.rs:138:10
[INFO] [stdout]     |
[INFO] [stdout] 138 |     let mut H:Matrix = Matrix{
[INFO] [stdout]     |             ^ help: convert the identifier to snake case: `h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `P_i` should have a snake case name
[INFO] [stdout]    --> src/main.rs:143:11
[INFO] [stdout]     |
[INFO] [stdout] 143 |         let mut P_i = P.coef[i].clone();
[INFO] [stdout]     |                 ^^^ help: convert the identifier to snake case: `p_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `origin_P_i` should have a snake case name
[INFO] [stdout]    --> src/main.rs:144:11
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let mut origin_P_i = P.coef[i].clone();
[INFO] [stdout]     |                 ^^^^^^^^^^ help: convert the identifier to snake case: `origin_p_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `P_i` should have a snake case name
[INFO] [stdout]    --> src/main.rs:153:11
[INFO] [stdout]     |
[INFO] [stdout] 153 |         let mut P_i = P.coef[i].clone();
[INFO] [stdout]     |                 ^^^ help: convert the identifier to snake case: `p_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `origin_P_i` should have a snake case name
[INFO] [stdout]    --> src/main.rs:154:11
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let mut origin_P_i = P.coef[i].clone();
[INFO] [stdout]     |                 ^^^^^^^^^^ help: convert the identifier to snake case: `origin_p_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Q` should have a snake case name
[INFO] [stdout]    --> src/main.rs:177:10
[INFO] [stdout]     |
[INFO] [stdout] 177 |     let mut Q:Polynomial = Polynomial{
[INFO] [stdout]     |             ^ help: convert the identifier to snake case: `q`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Q0` should have a snake case name
[INFO] [stdout]    --> src/main.rs:193:10
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let mut Q0:Polynomial = Polynomial{
[INFO] [stdout]     |             ^^ help: convert the identifier to snake case: `q0`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Q1` should have a snake case name
[INFO] [stdout]    --> src/main.rs:196:10
[INFO] [stdout]     |
[INFO] [stdout] 196 |     let mut Q1:Polynomial = Polynomial{
[INFO] [stdout]     |             ^^ help: convert the identifier to snake case: `q1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.37s
[INFO] running `Command { std: "docker" "inspect" "eb544f698cc1fc6d3ca0cf4b10fc4d5c25bfd1546b2cd8e66332b259131779d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb544f698cc1fc6d3ca0cf4b10fc4d5c25bfd1546b2cd8e66332b259131779d5", kill_on_drop: false }`
[INFO] [stdout] eb544f698cc1fc6d3ca0cf4b10fc4d5c25bfd1546b2cd8e66332b259131779d5
