[INFO] cloning repository https://github.com/michaetto/fun-with-algs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michaetto/fun-with-algs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaetto%2Ffun-with-algs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaetto%2Ffun-with-algs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2b1888f475a19f6ca1bad2a099dfeacd1c4068b4
[INFO] checking michaetto/fun-with-algs against try#8c500c7cefd54fd11d57295f3771d576be9ee415 for pr-145113
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaetto%2Ffun-with-algs" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/michaetto/fun-with-algs
[INFO] finished tweaking git repo https://github.com/michaetto/fun-with-algs
[INFO] tweaked toml for git repo https://github.com/michaetto/fun-with-algs written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/michaetto/fun-with-algs on toolchain 8c500c7cefd54fd11d57295f3771d576be9ee415
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c500c7cefd54fd11d57295f3771d576be9ee415" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/michaetto/fun-with-algs 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" "+8c500c7cefd54fd11d57295f3771d576be9ee415" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+8c500c7cefd54fd11d57295f3771d576be9ee415" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58ba8d557ae5b5d003414c5269fcd8ea9ebf5713d9f39e28d9fe984a9965862e
[INFO] running `Command { std: "docker" "start" "-a" "58ba8d557ae5b5d003414c5269fcd8ea9ebf5713d9f39e28d9fe984a9965862e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58ba8d557ae5b5d003414c5269fcd8ea9ebf5713d9f39e28d9fe984a9965862e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58ba8d557ae5b5d003414c5269fcd8ea9ebf5713d9f39e28d9fe984a9965862e", kill_on_drop: false }`
[INFO] [stdout] 58ba8d557ae5b5d003414c5269fcd8ea9ebf5713d9f39e28d9fe984a9965862e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+8c500c7cefd54fd11d57295f3771d576be9ee415" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b6c1ff93269a4455bdbb685c71d534bd0cc31d49d8a75548907d0c20345cb6a5
[INFO] running `Command { std: "docker" "start" "-a" "b6c1ff93269a4455bdbb685c71d534bd0cc31d49d8a75548907d0c20345cb6a5", kill_on_drop: false }`
[INFO] [stderr]     Checking fun-with-algs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `dfs_path_in_unweighted_linked_graph` is never used
[INFO] [stdout]   --> src/search/dfs.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn dfs_path_in_unweighted_linked_graph<V, E>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Sorter` is never used
[INFO] [stdout]  --> src/sort/mod.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | trait Sorter {
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BubbleSort` is never constructed
[INFO] [stdout]  --> src/sort/bubblesort.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct BubbleSort;
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BubbleSortWithSinkAtTheBeginning` is never constructed
[INFO] [stdout]   --> src/sort/bubblesort.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct BubbleSortWithSinkAtTheBeginning;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BubbleSortDescending` is never constructed
[INFO] [stdout]   --> src/sort/bubblesort.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct BubbleSortDescending;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SelectionSort` is never constructed
[INFO] [stdout]  --> src/sort/heapsort.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct SelectionSort;
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `swap_and_repair` is never used
[INFO] [stdout]   --> src/sort/heapsort.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn swap_and_repair<T>(slice: &mut [T])
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bubble_down` is never used
[INFO] [stdout]   --> src/sort/heapsort.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn bubble_down<T: Ord + Debug>(slice: &mut [T], p: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build` is never used
[INFO] [stdout]   --> src/sort/heapsort.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn build<T: Ord + Debug>(slice: &mut [T]) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `merge` is never used
[INFO] [stdout]   --> src/sort/mergesort.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn merge<'a, T: Ord + Clone>(left: &'a [T], right: &'a [T], out: &mut [T]) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mergesort` is never used
[INFO] [stdout]   --> src/sort/mergesort.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn mergesort<T: Ord + Clone>(slice_in: &mut [T], slice_out: &mut [T]) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `put_pivot_at_first` is never used
[INFO] [stdout]   --> src/sort/quicksort.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn put_pivot_at_first<T: Ord + Clone>(slice: &mut [T]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `quicksort` is never used
[INFO] [stdout]   --> src/sort/quicksort.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn quicksort<T: Ord + Clone>(slice: &mut [T]) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SelectionSort` is never constructed
[INFO] [stdout]  --> src/sort/selectionsort.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct SelectionSort;
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bfs_graph_traversal_in_indexed_graph` is never used
[INFO] [stdout]  --> src/traverse/bfs.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn bfs_graph_traversal_in_indexed_graph<N, E>(
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bfs_graph_traversal_in_linked_graph` is never used
[INFO] [stdout]   --> src/traverse/bfs.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn bfs_graph_traversal_in_linked_graph(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "b6c1ff93269a4455bdbb685c71d534bd0cc31d49d8a75548907d0c20345cb6a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6c1ff93269a4455bdbb685c71d534bd0cc31d49d8a75548907d0c20345cb6a5", kill_on_drop: false }`
[INFO] [stdout] b6c1ff93269a4455bdbb685c71d534bd0cc31d49d8a75548907d0c20345cb6a5