[INFO] cloning repository https://github.com/rust-master/bottlenecks-undirected-graph-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-master/bottlenecks-undirected-graph-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-master%2Fbottlenecks-undirected-graph-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-master%2Fbottlenecks-undirected-graph-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c31b74a8289720994b0f2da34cecd9993b232ced
[INFO] checking rust-master/bottlenecks-undirected-graph-rust against master#96cfc75584359ae7ad11cc45968059f29e7b44b7 for pr-137728
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-master%2Fbottlenecks-undirected-graph-rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-master/bottlenecks-undirected-graph-rust on toolchain 96cfc75584359ae7ad11cc45968059f29e7b44b7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rust-master/bottlenecks-undirected-graph-rust
[INFO] finished tweaking git repo https://github.com/rust-master/bottlenecks-undirected-graph-rust
[INFO] tweaked toml for git repo https://github.com/rust-master/bottlenecks-undirected-graph-rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-master/bottlenecks-undirected-graph-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" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce22803bb224d34bca4501fab219653a20bf7df31a846abdf49e71f81399a5ba
[INFO] running `Command { std: "docker" "start" "-a" "ce22803bb224d34bca4501fab219653a20bf7df31a846abdf49e71f81399a5ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce22803bb224d34bca4501fab219653a20bf7df31a846abdf49e71f81399a5ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce22803bb224d34bca4501fab219653a20bf7df31a846abdf49e71f81399a5ba", kill_on_drop: false }`
[INFO] [stdout] ce22803bb224d34bca4501fab219653a20bf7df31a846abdf49e71f81399a5ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df6adbb7f457d4b81a8ab5ee26e2c79b8db3e9b825f4d6f8b51dd174fa7c4a2b
[INFO] running `Command { std: "docker" "start" "-a" "df6adbb7f457d4b81a8ab5ee26e2c79b8db3e9b825f4d6f8b51dd174fa7c4a2b", kill_on_drop: false }`
[INFO] [stderr]     Checking algo-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::BufReader`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::BufReader;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufReader`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::BufReader;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]    --> src/main.rs:168:10
[INFO] [stdout]     |
[INFO] [stdout] 168 |     for (idx, val) in result.iter().enumerate() {
[INFO] [stdout]     |          ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]    --> src/main.rs:168:10
[INFO] [stdout]     |
[INFO] [stdout] 168 |     for (idx, val) in result.iter().enumerate() {
[INFO] [stdout]     |          ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "df6adbb7f457d4b81a8ab5ee26e2c79b8db3e9b825f4d6f8b51dd174fa7c4a2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df6adbb7f457d4b81a8ab5ee26e2c79b8db3e9b825f4d6f8b51dd174fa7c4a2b", kill_on_drop: false }`
[INFO] [stdout] df6adbb7f457d4b81a8ab5ee26e2c79b8db3e9b825f4d6f8b51dd174fa7c4a2b