[INFO] cloning repository https://github.com/Mec-iS/rust-algos-illuminated
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Mec-iS/rust-algos-illuminated" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMec-iS%2Frust-algos-illuminated", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMec-iS%2Frust-algos-illuminated'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e9b7e2a77cfe1d878f4b30043b1e25a1561476db
[INFO] testing Mec-iS/rust-algos-illuminated against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMec-iS%2Frust-algos-illuminated" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Mec-iS/rust-algos-illuminated on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Mec-iS/rust-algos-illuminated
[INFO] finished tweaking git repo https://github.com/Mec-iS/rust-algos-illuminated
[INFO] tweaked toml for git repo https://github.com/Mec-iS/rust-algos-illuminated written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Mec-iS/rust-algos-illuminated already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f5db62d492ddf6aa7603d4a8af13a4d5a14394e3fae532bba79a8f1617847f4
[INFO] running `Command { std: "docker" "start" "-a" "4f5db62d492ddf6aa7603d4a8af13a4d5a14394e3fae532bba79a8f1617847f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f5db62d492ddf6aa7603d4a8af13a4d5a14394e3fae532bba79a8f1617847f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f5db62d492ddf6aa7603d4a8af13a4d5a14394e3fae532bba79a8f1617847f4", kill_on_drop: false }`
[INFO] [stdout] 4f5db62d492ddf6aa7603d4a8af13a4d5a14394e3fae532bba79a8f1617847f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b9d162ffdbf6d0c05383e9ac9cfdefee375ed5ac9199162fcec2000ddfaaa63
[INFO] running `Command { std: "docker" "start" "-a" "0b9d162ffdbf6d0c05383e9ac9cfdefee375ed5ac9199162fcec2000ddfaaa63", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-algos-illuminated v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Queue`
[INFO] [stdout]  --> src/other/mod.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Queue {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/other/mod.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn push(&mut self, element: char) -> () {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_raw`
[INFO] [stdout]   --> src/other/mod.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn pop_raw(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_swap`
[INFO] [stdout]   --> src/other/mod.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn pop_swap(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `split`
[INFO] [stdout]   --> src/other/mod.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn split(self) -> (Vec<char>, Vec<char>) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/other/mod.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn new() -> Queue {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:106:34
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                  ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:106:47
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                               ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:143:39
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:143:52
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:24
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                        ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:37
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                     ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:50
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                                  ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Queue`
[INFO] [stdout]  --> src/other/mod.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Queue {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/other/mod.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn push(&mut self, element: char) -> () {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_raw`
[INFO] [stdout]   --> src/other/mod.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn pop_raw(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_swap`
[INFO] [stdout]   --> src/other/mod.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn pop_swap(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `split`
[INFO] [stdout]   --> src/other/mod.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn split(self) -> (Vec<char>, Vec<char>) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/other/mod.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn new() -> Queue {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:106:34
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                  ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:106:47
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                               ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:143:39
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:143:52
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:24
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                        ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:37
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                     ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:50
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                                  ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.28s
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0b9d162ffdbf6d0c05383e9ac9cfdefee375ed5ac9199162fcec2000ddfaaa63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b9d162ffdbf6d0c05383e9ac9cfdefee375ed5ac9199162fcec2000ddfaaa63", kill_on_drop: false }`
[INFO] [stdout] 0b9d162ffdbf6d0c05383e9ac9cfdefee375ed5ac9199162fcec2000ddfaaa63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 46a8a20c4f5f4d5141af50d7a264cb53c86ea08c81ca59d8d89f42ad567bd28b
[INFO] running `Command { std: "docker" "start" "-a" "46a8a20c4f5f4d5141af50d7a264cb53c86ea08c81ca59d8d89f42ad567bd28b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-algos-illuminated v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Queue`
[INFO] [stdout]  --> src/other/mod.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Queue {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/other/mod.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn push(&mut self, element: char) -> () {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_raw`
[INFO] [stdout]   --> src/other/mod.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn pop_raw(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_swap`
[INFO] [stdout]   --> src/other/mod.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn pop_swap(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `split`
[INFO] [stdout]   --> src/other/mod.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn split(self) -> (Vec<char>, Vec<char>) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/other/mod.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn new() -> Queue {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:106:34
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                  ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:106:47
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                               ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:143:39
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:143:52
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:24
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                        ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:37
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                     ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:50
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                                  ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Queue`
[INFO] [stdout]  --> src/other/mod.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Queue {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/other/mod.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn push(&mut self, element: char) -> () {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_raw`
[INFO] [stdout]   --> src/other/mod.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn pop_raw(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_swap`
[INFO] [stdout]   --> src/other/mod.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn pop_swap(&mut self) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `split`
[INFO] [stdout]   --> src/other/mod.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn split(self) -> (Vec<char>, Vec<char>) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/other/mod.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn new() -> Queue {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:106:34
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                  ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:106:47
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                               ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:143:39
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:143:52
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:24
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                        ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:37
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                     ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:50
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                                  ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `split`
[INFO] [stdout]   --> src/other/mod.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn split(self) -> (Vec<char>, Vec<char>) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:106:34
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                  ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:106:47
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                               ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:143:39
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:143:52
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:24
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                        ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:37
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                     ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stdout]    --> src/chapter_one/mod.rs:170:50
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]     |                                                  ^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `Command { std: "docker" "inspect" "46a8a20c4f5f4d5141af50d7a264cb53c86ea08c81ca59d8d89f42ad567bd28b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46a8a20c4f5f4d5141af50d7a264cb53c86ea08c81ca59d8d89f42ad567bd28b", kill_on_drop: false }`
[INFO] [stdout] 46a8a20c4f5f4d5141af50d7a264cb53c86ea08c81ca59d8d89f42ad567bd28b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bcc5ad7813b42d71448fe1ee3c585bc55804907c0b729d6f83ec68b786ed4a26
[INFO] running `Command { std: "docker" "start" "-a" "bcc5ad7813b42d71448fe1ee3c585bc55804907c0b729d6f83ec68b786ed4a26", kill_on_drop: false }`
[INFO] [stderr] warning: struct is never constructed: `Queue`
[INFO] [stderr]  --> src/other/mod.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Queue {
[INFO] [stderr]   |            ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `push`
[INFO] [stderr]   --> src/other/mod.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn push(&mut self, element: char) -> () {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pop_raw`
[INFO] [stderr]   --> src/other/mod.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn pop_raw(&mut self) -> Option<char> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pop_swap`
[INFO] [stderr]   --> src/other/mod.rs:35:12
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn pop_swap(&mut self) -> Option<char> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `split`
[INFO] [stderr]   --> src/other/mod.rs:55:12
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn split(self) -> (Vec<char>, Vec<char>) {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/other/mod.rs:60:12
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn new() -> Queue {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stderr]    --> src/chapter_one/mod.rs:106:34
[INFO] [stderr]     |
[INFO] [stderr] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]     |                                  ^^^^^^^^ not FFI-safe
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr]     = note: this struct has unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stderr]    --> src/chapter_one/mod.rs:106:47
[INFO] [stderr]     |
[INFO] [stderr] 106 | pub extern fn selectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]     |                                               ^^^^^^^^ not FFI-safe
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr]     = note: this struct has unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stderr]    --> src/chapter_one/mod.rs:143:39
[INFO] [stderr]     |
[INFO] [stderr] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]     |                                       ^^^^^^^^ not FFI-safe
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr]     = note: this struct has unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stderr]    --> src/chapter_one/mod.rs:143:52
[INFO] [stderr]     |
[INFO] [stderr] 143 | pub extern fn MergeSelectionSort(arr: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]     |                                                    ^^^^^^^^ not FFI-safe
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr]     = note: this struct has unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stderr]    --> src/chapter_one/mod.rs:170:24
[INFO] [stderr]     |
[INFO] [stderr] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]     |                        ^^^^^^^^ not FFI-safe
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr]     = note: this struct has unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stderr]    --> src/chapter_one/mod.rs:170:37
[INFO] [stderr]     |
[INFO] [stderr] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]     |                                     ^^^^^^^^ not FFI-safe
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr]     = note: this struct has unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` fn uses type `Vec<i32>`, which is not FFI-safe
[INFO] [stderr]    --> src/chapter_one/mod.rs:170:50
[INFO] [stderr]     |
[INFO] [stderr] 170 | pub extern fn Merge(c: Vec<i32>, d: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]     |                                                  ^^^^^^^^ not FFI-safe
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr]     = note: this struct has unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-algos-illuminated` (lib) generated 13 warnings
[INFO] [stdout] 
[INFO] [stderr] warning: associated function is never used: `split`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/other/mod.rs:55:12
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 55 |     pub fn split(self) -> (Vec<char>, Vec<char>) {
[INFO] [stdout] 
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-algos-illuminated` (lib test) generated 13 warnings (13 duplicates)
[INFO] [stderr] warning: `rust-algos-illuminated` (bin "rust-algos-illuminated" test) generated 8 warnings (7 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_algos_illuminated-f110a2adf4e461d2)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_algos_illuminated-cb664ad730a4bac1)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test tests::tests::bench_queue_pop_swap ... ok
[INFO] [stdout] test tests::tests::bench_chap1_mult_karat ... ok
[INFO] [stdout] test tests::tests::test_Karatsuba ... ok
[INFO] [stdout] test tests::tests::test_MergeSelectionSort ... ok
[INFO] [stdout] test tests::tests::bench_chap1_mult_recursive ... ok
[INFO] [stdout] test tests::tests::bench_chap1_mult_std ... ok
[INFO] [stdout] test tests::tests::test_RecIntMul ... ok
[INFO] [stdout] test tests::tests::test_queue_swap ... ok
[INFO] [stdout] test tests::tests::test_quadSort ... ok
[INFO] [stdout] test tests::tests::test_queue_raw ... ok
[INFO] [stdout] test tests::tests::bench_queue_pop_raw ... ok
[INFO] [stdout] test tests::tests::test_isSorted ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust-algos-illuminated
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bcc5ad7813b42d71448fe1ee3c585bc55804907c0b729d6f83ec68b786ed4a26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcc5ad7813b42d71448fe1ee3c585bc55804907c0b729d6f83ec68b786ed4a26", kill_on_drop: false }`
[INFO] [stdout] bcc5ad7813b42d71448fe1ee3c585bc55804907c0b729d6f83ec68b786ed4a26