[INFO] cloning repository https://github.com/emielvanseveren/cracking-the-coding-interview
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emielvanseveren/cracking-the-coding-interview" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femielvanseveren%2Fcracking-the-coding-interview", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femielvanseveren%2Fcracking-the-coding-interview'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 60d0f807e16d3b9b7d08a0c6a84fd8d82d94241d
[INFO] checking emielvanseveren/cracking-the-coding-interview against try#18c1d185ac7a6a3bf399296b35e4b2736809a756 for pr-146972
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femielvanseveren%2Fcracking-the-coding-interview" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/emielvanseveren/cracking-the-coding-interview
[INFO] finished tweaking git repo https://github.com/emielvanseveren/cracking-the-coding-interview
[INFO] tweaked toml for git repo https://github.com/emielvanseveren/cracking-the-coding-interview written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/emielvanseveren/cracking-the-coding-interview on toolchain 18c1d185ac7a6a3bf399296b35e4b2736809a756
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/emielvanseveren/cracking-the-coding-interview 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" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 008487a0b723ac244fca68b8cc0ccc525458d7f2a36e3e2ed7e198cd2c1d1442
[INFO] running `Command { std: "docker" "start" "-a" "008487a0b723ac244fca68b8cc0ccc525458d7f2a36e3e2ed7e198cd2c1d1442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "008487a0b723ac244fca68b8cc0ccc525458d7f2a36e3e2ed7e198cd2c1d1442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "008487a0b723ac244fca68b8cc0ccc525458d7f2a36e3e2ed7e198cd2c1d1442", kill_on_drop: false }`
[INFO] [stdout] 008487a0b723ac244fca68b8cc0ccc525458d7f2a36e3e2ed7e198cd2c1d1442
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4574c70680ada79e5f4a3d180786d09f365271fb4c920f4e3dc805b70c1eab9d
[INFO] running `Command { std: "docker" "start" "-a" "4574c70680ada79e5f4a3d180786d09f365271fb4c920f4e3dc805b70c1eab9d", kill_on_drop: false }`
[INFO] [stderr]     Checking cracking-the-coding-interview v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `kth_to_last` is never used
[INFO] [stdout]  --> src/bin/c02p02.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn kth_to_last() {}
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/c02p02.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/bin/c01p06.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn compress(s: &str) -> String {
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `c01p07`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider adding a `main` function to `src/bin/c01p07.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_remove_dups_part_a` is never used
[INFO] [stdout]  --> src/bin/c02p01.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn test_remove_dups_part_a() {}
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_remove_dups_part_b` is never used
[INFO] [stdout]   --> src/bin/c02p01.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn test_remove_dups_part_b() {}
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `kth_to_last` is never used
[INFO] [stdout]  --> src/bin/c02p02.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn kth_to_last() {}
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cracking-the-coding-interview` (bin "c01p07") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `Image`
[INFO] [stdout]   --> src/bin/c01p08.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         assert_eq!(rotated_img, img);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         Image
[INFO] [stdout]    |         Image
[INFO] [stdout]    |
[INFO] [stdout] note: an implementation of `PartialEq` might be missing for `Image`
[INFO] [stdout]   --> src/bin/c01p08.rs:8:1
[INFO] [stdout]    |
[INFO] [stdout]  8 | struct Image;
[INFO] [stdout]    | ^^^^^^^^^^^^ must implement `PartialEq`
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: consider annotating `Image` with `#[derive(PartialEq)]`
[INFO] [stdout]    |
[INFO] [stdout]  8 + #[derive(PartialEq)]
[INFO] [stdout]  9 | struct Image;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `img`
[INFO] [stdout]   --> src/bin/c01p08.rs:10:18
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn rotate_matrix(img: Image) -> Image {
[INFO] [stdout]    |                  ^^^ help: if this is intentional, prefix it with an underscore: `_img`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `img`
[INFO] [stdout]   --> src/bin/c01p08.rs:14:27
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn rotate_matrix_in_place(img: Image) -> Image {
[INFO] [stdout]    |                           ^^^ help: if this is intentional, prefix it with an underscore: `_img`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0369`.
[INFO] [stdout] 
[INFO] [stdout] warning: methods `to_next` and `to_empty` are never used
[INFO] [stdout]   --> src/bin/linkedlist.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | / impl<T> Node<T>
[INFO] [stdout] 16 | | where
[INFO] [stdout] 17 | |     T: Copy,
[INFO] [stdout]    | |____________- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |       fn to_next(&mut self, nxt: Node<T>) {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |       fn to_empty(&mut self) {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cracking-the-coding-interview` (bin "c01p08" test) due to 1 previous error; 2 warnings emitted
[INFO] [stdout] error[E0601]: `main` function not found in crate `linkedlist`
[INFO] [stdout]    --> src/bin/linkedlist.rs:107:2
[INFO] [stdout]     |
[INFO] [stdout] 107 | }
[INFO] [stdout]     |  ^ consider adding a `main` function to `src/bin/linkedlist.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/bin/c02p01.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `img`
[INFO] [stdout]   --> src/bin/c01p08.rs:10:18
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn rotate_matrix(img: Image) -> Image {
[INFO] [stdout]    |                  ^^^ help: if this is intentional, prefix it with an underscore: `_img`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `img`
[INFO] [stdout]   --> src/bin/c01p08.rs:14:27
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn rotate_matrix_in_place(img: Image) -> Image {
[INFO] [stdout]    |                           ^^^ help: if this is intentional, prefix it with an underscore: `_img`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Image` is never constructed
[INFO] [stdout]  --> src/bin/c01p08.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Image;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rotate_matrix` is never used
[INFO] [stdout]   --> src/bin/c01p08.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn rotate_matrix(img: Image) -> Image {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rotate_matrix_in_place` is never used
[INFO] [stdout]   --> src/bin/c01p08.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn rotate_matrix_in_place(img: Image) -> Image {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]  --> src/bin/c01p09.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn is_rotation(s1: &str, s2: &str) -> bool {
[INFO] [stdout]   |                ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]  --> src/bin/c01p09.rs:8:26
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn is_rotation(s1: &str, s2: &str) -> bool {
[INFO] [stdout]   |                          ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_remove_dups_part_a` is never used
[INFO] [stdout]  --> src/bin/c02p01.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn test_remove_dups_part_a() {}
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_remove_dups_part_b` is never used
[INFO] [stdout]   --> src/bin/c02p01.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn test_remove_dups_part_b() {}
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cracking-the-coding-interview` (bin "linkedlist") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "4574c70680ada79e5f4a3d180786d09f365271fb4c920f4e3dc805b70c1eab9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4574c70680ada79e5f4a3d180786d09f365271fb4c920f4e3dc805b70c1eab9d", kill_on_drop: false }`
[INFO] [stdout] 4574c70680ada79e5f4a3d180786d09f365271fb4c920f4e3dc805b70c1eab9d