[INFO] cloning repository https://github.com/darkphotonKN/rust-tool-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/darkphotonKN/rust-tool-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdarkphotonKN%2Frust-tool-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdarkphotonKN%2Frust-tool-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5fd53482e4498158ee44fa53d34971adbc870c4
[INFO] checking darkphotonKN/rust-tool-playground/a5fd53482e4498158ee44fa53d34971adbc870c4 against master#5fe0e40e05f2d0408c6a292b160f96d595aedfbc for pr-130367
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdarkphotonKN%2Frust-tool-playground" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/darkphotonKN/rust-tool-playground on toolchain 5fe0e40e05f2d0408c6a292b160f96d595aedfbc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5fe0e40e05f2d0408c6a292b160f96d595aedfbc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/darkphotonKN/rust-tool-playground
[INFO] finished tweaking git repo https://github.com/darkphotonKN/rust-tool-playground
[INFO] tweaked toml for git repo https://github.com/darkphotonKN/rust-tool-playground written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/darkphotonKN/rust-tool-playground 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" "+5fe0e40e05f2d0408c6a292b160f96d595aedfbc" "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@sha256:96c0aa5895ecf336b730ef27bcdde6e21027415df19888aad3cf1448e5d65d90" "/opt/rustwide/cargo-home/bin/cargo" "+5fe0e40e05f2d0408c6a292b160f96d595aedfbc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5625d2e046e47e884987884d9640481fc2e16012bc1ba4edf82a7df6a7a4970e
[INFO] running `Command { std: "docker" "start" "-a" "5625d2e046e47e884987884d9640481fc2e16012bc1ba4edf82a7df6a7a4970e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5625d2e046e47e884987884d9640481fc2e16012bc1ba4edf82a7df6a7a4970e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5625d2e046e47e884987884d9640481fc2e16012bc1ba4edf82a7df6a7a4970e", kill_on_drop: false }`
[INFO] [stdout] 5625d2e046e47e884987884d9640481fc2e16012bc1ba4edf82a7df6a7a4970e
[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@sha256:96c0aa5895ecf336b730ef27bcdde6e21027415df19888aad3cf1448e5d65d90" "/opt/rustwide/cargo-home/bin/cargo" "+5fe0e40e05f2d0408c6a292b160f96d595aedfbc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25178bce9342dcfa6ba42380bd9ff0dbaba8c3005d7a5ccf9e16f23fa16192e5
[INFO] running `Command { std: "docker" "start" "-a" "25178bce9342dcfa6ba42380bd9ff0dbaba8c3005d7a5ccf9e16f23fa16192e5", kill_on_drop: false }`
[INFO] [stderr]     Checking tokio v1.33.0
[INFO] [stderr]     Checking playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> src/main.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let m: &mut String = &mut n;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut arr: Vec<u32> = vec![1,2,3]; // dynamic array 
[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/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut arr2: Vec<u32>;
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `addToArray` should have a snake case name
[INFO] [stdout]  --> src/arrays.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn addToArray(num: u32, mut arr: Vec<u32>) -> Vec<u32> {
[INFO] [stdout]   |        ^^^^^^^^^^ help: convert the identifier to snake case: `add_to_array`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> src/main.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let m: &mut String = &mut n;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut arr: Vec<u32> = vec![1,2,3]; // dynamic array 
[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/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut arr2: Vec<u32>;
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `addToArray` should have a snake case name
[INFO] [stdout]  --> src/arrays.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn addToArray(num: u32, mut arr: Vec<u32>) -> Vec<u32> {
[INFO] [stdout]   |        ^^^^^^^^^^ help: convert the identifier to snake case: `add_to_array`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "25178bce9342dcfa6ba42380bd9ff0dbaba8c3005d7a5ccf9e16f23fa16192e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25178bce9342dcfa6ba42380bd9ff0dbaba8c3005d7a5ccf9e16f23fa16192e5", kill_on_drop: false }`
[INFO] [stdout] 25178bce9342dcfa6ba42380bd9ff0dbaba8c3005d7a5ccf9e16f23fa16192e5