[INFO] cloning repository https://github.com/axel-kaliff/maxflow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/axel-kaliff/maxflow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faxel-kaliff%2Fmaxflow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faxel-kaliff%2Fmaxflow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d7e7f9dfa70bf0ac4ca5dada1dfb9f322d2d86e4
[INFO] checking axel-kaliff/maxflow against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faxel-kaliff%2Fmaxflow" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/axel-kaliff/maxflow on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/axel-kaliff/maxflow
[INFO] finished tweaking git repo https://github.com/axel-kaliff/maxflow
[INFO] tweaked toml for git repo https://github.com/axel-kaliff/maxflow written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/axel-kaliff/maxflow already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7da4712af4570eca12987d2e836046ac9bc0490c8f22f110f0c61c86a601233
[INFO] running `Command { std: "docker" "start" "-a" "a7da4712af4570eca12987d2e836046ac9bc0490c8f22f110f0c61c86a601233", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7da4712af4570eca12987d2e836046ac9bc0490c8f22f110f0c61c86a601233", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7da4712af4570eca12987d2e836046ac9bc0490c8f22f110f0c61c86a601233", kill_on_drop: false }`
[INFO] [stdout] a7da4712af4570eca12987d2e836046ac9bc0490c8f22f110f0c61c86a601233
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68ebc5ab7017e7f3df2f69982bd1604c9628d8cb2297bbd6bcf7c07077c93c7f
[INFO] running `Command { std: "docker" "start" "-a" "68ebc5ab7017e7f3df2f69982bd1604c9628d8cb2297bbd6bcf7c07077c93c7f", kill_on_drop: false }`
[INFO] [stderr]     Checking maxflow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::LinkedList`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::LinkedList`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ford_fulkerson`
[INFO] [stdout]  --> src/main.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn ford_fulkerson(graph: Vec<Vec<usize>>, V: usize, s: usize, t: usize) -> usize {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bfs`
[INFO] [stdout]   --> src/main.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn bfs(rGraph: &Vec<Vec<usize>>, s: usize, t: usize, parent: &mut Vec<isize>, V: usize) -> bool {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `V` should have a snake case name
[INFO] [stdout]  --> src/main.rs:5:43
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn ford_fulkerson(graph: Vec<Vec<usize>>, V: usize, s: usize, t: usize) -> usize {
[INFO] [stdout]   |                                           ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `rGraph` should have a snake case name
[INFO] [stdout]  --> src/main.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut rGraph: Vec<Vec<usize>> = Vec::new();
[INFO] [stdout]   |             ^^^^^^ help: convert the identifier to snake case: `r_graph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `rGraph` should have a snake case name
[INFO] [stdout]   --> src/main.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn bfs(rGraph: &Vec<Vec<usize>>, s: usize, t: usize, parent: &mut Vec<isize>, V: usize) -> bool {
[INFO] [stdout]    |        ^^^^^^ help: convert the identifier to snake case: `r_graph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `V` should have a snake case name
[INFO] [stdout]   --> src/main.rs:47:79
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn bfs(rGraph: &Vec<Vec<usize>>, s: usize, t: usize, parent: &mut Vec<isize>, V: usize) -> bool {
[INFO] [stdout]    |                                                                               ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ford_fulkerson`
[INFO] [stdout]  --> src/main.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn ford_fulkerson(graph: Vec<Vec<usize>>, V: usize, s: usize, t: usize) -> usize {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bfs`
[INFO] [stdout]   --> src/main.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn bfs(rGraph: &Vec<Vec<usize>>, s: usize, t: usize, parent: &mut Vec<isize>, V: usize) -> bool {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `V` should have a snake case name
[INFO] [stdout]  --> src/main.rs:5:43
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn ford_fulkerson(graph: Vec<Vec<usize>>, V: usize, s: usize, t: usize) -> usize {
[INFO] [stdout]   |                                           ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `rGraph` should have a snake case name
[INFO] [stdout]  --> src/main.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut rGraph: Vec<Vec<usize>> = Vec::new();
[INFO] [stdout]   |             ^^^^^^ help: convert the identifier to snake case: `r_graph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `rGraph` should have a snake case name
[INFO] [stdout]   --> src/main.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn bfs(rGraph: &Vec<Vec<usize>>, s: usize, t: usize, parent: &mut Vec<isize>, V: usize) -> bool {
[INFO] [stdout]    |        ^^^^^^ help: convert the identifier to snake case: `r_graph`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `V` should have a snake case name
[INFO] [stdout]   --> src/main.rs:47:79
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn bfs(rGraph: &Vec<Vec<usize>>, s: usize, t: usize, parent: &mut Vec<isize>, V: usize) -> bool {
[INFO] [stdout]    |                                                                               ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "68ebc5ab7017e7f3df2f69982bd1604c9628d8cb2297bbd6bcf7c07077c93c7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68ebc5ab7017e7f3df2f69982bd1604c9628d8cb2297bbd6bcf7c07077c93c7f", kill_on_drop: false }`
[INFO] [stdout] 68ebc5ab7017e7f3df2f69982bd1604c9628d8cb2297bbd6bcf7c07077c93c7f