[INFO] cloning repository https://github.com/johnlarkin1/disjoint-set-union
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johnlarkin1/disjoint-set-union" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnlarkin1%2Fdisjoint-set-union", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnlarkin1%2Fdisjoint-set-union'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90c35dcbd3617a2993c7c7173c987f1919fd9c56
[INFO] checking johnlarkin1/disjoint-set-union/90c35dcbd3617a2993c7c7173c987f1919fd9c56 against c999cef531ea9059e189e82fe0e82c5daf249bc9 for pr-152972
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnlarkin1%2Fdisjoint-set-union" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/johnlarkin1/disjoint-set-union
[INFO] finished tweaking git repo https://github.com/johnlarkin1/disjoint-set-union
[INFO] tweaked toml for git repo https://github.com/johnlarkin1/disjoint-set-union written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/johnlarkin1/disjoint-set-union on toolchain c999cef531ea9059e189e82fe0e82c5daf249bc9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c999cef531ea9059e189e82fe0e82c5daf249bc9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/johnlarkin1/disjoint-set-union 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" "+c999cef531ea9059e189e82fe0e82c5daf249bc9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] cd4b4d4d1d35ec80419374bb6ee9326874f6f6b42a9e3d29e43569446aa1de0a
[INFO] running `Command { std: "docker" "start" "cd4b4d4d1d35ec80419374bb6ee9326874f6f6b42a9e3d29e43569446aa1de0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd4b4d4d1d35ec80419374bb6ee9326874f6f6b42a9e3d29e43569446aa1de0a", 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" "cd4b4d4d1d35ec80419374bb6ee9326874f6f6b42a9e3d29e43569446aa1de0a" "/opt/rustwide/cargo-home/bin/cargo" "+c999cef531ea9059e189e82fe0e82c5daf249bc9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd4b4d4d1d35ec80419374bb6ee9326874f6f6b42a9e3d29e43569446aa1de0a", 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" "cd4b4d4d1d35ec80419374bb6ee9326874f6f6b42a9e3d29e43569446aa1de0a" "/opt/rustwide/cargo-home/bin/cargo" "+c999cef531ea9059e189e82fe0e82c5daf249bc9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking disjoint-set-union v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `prev_parent` is never read
[INFO] [stdout]    --> src/bin/demo.rs:170:27
[INFO] [stdout]     |
[INFO] [stdout] 170 |     let mut prev_parent = dsu.parent().to_vec();
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 314 |     prev_parent = dsu.parent().to_vec();
[INFO] [stdout]     |     ----------- `prev_parent` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `prev_rank` is never read
[INFO] [stdout]    --> src/bin/demo.rs:171:25
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let mut prev_rank = dsu.rank().to_vec();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 315 |     prev_rank = dsu.rank().to_vec();
[INFO] [stdout]     |     --------- `prev_rank` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_to_line` is never used
[INFO] [stdout]   --> src/bin/demo.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn move_to_line(line: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `prev_parent` is never read
[INFO] [stdout]    --> src/bin/demo.rs:170:27
[INFO] [stdout]     |
[INFO] [stdout] 170 |     let mut prev_parent = dsu.parent().to_vec();
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 314 |     prev_parent = dsu.parent().to_vec();
[INFO] [stdout]     |     ----------- `prev_parent` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `prev_rank` is never read
[INFO] [stdout]    --> src/bin/demo.rs:171:25
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let mut prev_rank = dsu.rank().to_vec();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 315 |     prev_rank = dsu.rank().to_vec();
[INFO] [stdout]     |     --------- `prev_rank` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_to_line` is never used
[INFO] [stdout]   --> src/bin/demo.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn move_to_line(line: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "cd4b4d4d1d35ec80419374bb6ee9326874f6f6b42a9e3d29e43569446aa1de0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd4b4d4d1d35ec80419374bb6ee9326874f6f6b42a9e3d29e43569446aa1de0a", kill_on_drop: false }`
[INFO] [stdout] cd4b4d4d1d35ec80419374bb6ee9326874f6f6b42a9e3d29e43569446aa1de0a
