[INFO] cloning repository https://github.com/nacleric/jaecheondaeseong
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nacleric/jaecheondaeseong" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnacleric%2Fjaecheondaeseong", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnacleric%2Fjaecheondaeseong'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] addae78a6b364e232981f4e8b92e2762638ef4bc
[INFO] testing nacleric/jaecheondaeseong against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnacleric%2Fjaecheondaeseong" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nacleric/jaecheondaeseong on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nacleric/jaecheondaeseong
[INFO] finished tweaking git repo https://github.com/nacleric/jaecheondaeseong
[INFO] tweaked toml for git repo https://github.com/nacleric/jaecheondaeseong written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/nacleric/jaecheondaeseong already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b05f1a5869d4ca80608460fac613dd3a57a6f83a898398e87655b4fde5bce286
[INFO] running `Command { std: "docker" "start" "-a" "b05f1a5869d4ca80608460fac613dd3a57a6f83a898398e87655b4fde5bce286", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b05f1a5869d4ca80608460fac613dd3a57a6f83a898398e87655b4fde5bce286", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b05f1a5869d4ca80608460fac613dd3a57a6f83a898398e87655b4fde5bce286", kill_on_drop: false }`
[INFO] [stdout] b05f1a5869d4ca80608460fac613dd3a57a6f83a898398e87655b4fde5bce286
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7332271e5b4c5535b4f706138b6eab8c7ce3c3f91cc006e7b352d1d790445e2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a7332271e5b4c5535b4f706138b6eab8c7ce3c3f91cc006e7b352d1d790445e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling non-empty-vec v0.1.2
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling termion v1.5.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling mori v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/model/position_buffer.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn new(buffer: Utf8Buffer, position: CursorPosition) -> Self {
[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: `delete_grapheme`
[INFO] [stdout]   --> src/model/position_buffer.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn delete_grapheme(&mut self, direction: Direction) -> Option<char> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `index`
[INFO] [stdout]   --> src/model/position_buffer.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 |     pub fn index(&mut self) -> &mut Self {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_grapheme`
[INFO] [stdout]   --> src/model/position_buffer.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn insert_grapheme(&mut self, grapheme: char) -> &mut Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_down`
[INFO] [stdout]   --> src/model/position_buffer.rs:86:12
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn move_down(&mut self) -> &mut Self {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_left`
[INFO] [stdout]    --> src/model/position_buffer.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout] 101 |     pub fn move_left(&mut self) -> &mut Self {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_right`
[INFO] [stdout]    --> src/model/position_buffer.rs:119:12
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn move_right(&mut self) -> &mut Self {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_up`
[INFO] [stdout]    --> src/model/position_buffer.rs:138:12
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub fn move_up(&mut self) -> &mut Self {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Direction`
[INFO] [stdout]  --> src/model/utf8_buffer/direction.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Direction {
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/model/cursor_position.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(col: usize, row: usize) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_tuple`
[INFO] [stdout]   --> src/model/cursor_position.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn as_tuple(&self) -> (usize, usize) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `col`
[INFO] [stdout]   --> src/model/cursor_position.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn col(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `row`
[INFO] [stdout]   --> src/model/cursor_position.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn row(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_data`
[INFO] [stdout]   --> src/view/mock_terminal.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn get_data(&self) -> [[Option<char>; WIDTH]; HEIGHT] {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]   --> src/view.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     data: [[Option<char>; WIDTH]; HEIGHT],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `view_buffer`
[INFO] [stdout]   --> src/view.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     view_buffer: VB,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tty_control`
[INFO] [stdout]   --> src/view.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     tty_control: TC,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `view_buffer`
[INFO] [stdout]   --> src/view.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn view_buffer(&self) -> &VB {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.04s
[INFO] running `Command { std: "docker" "inspect" "a7332271e5b4c5535b4f706138b6eab8c7ce3c3f91cc006e7b352d1d790445e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7332271e5b4c5535b4f706138b6eab8c7ce3c3f91cc006e7b352d1d790445e2", kill_on_drop: false }`
[INFO] [stdout] a7332271e5b4c5535b4f706138b6eab8c7ce3c3f91cc006e7b352d1d790445e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7909042f3d2e3b2104b702f2be16d4f16318231dfc03623befd33a9ef9b4aaa1
[INFO] running `Command { std: "docker" "start" "-a" "7909042f3d2e3b2104b702f2be16d4f16318231dfc03623befd33a9ef9b4aaa1", kill_on_drop: false }`
[INFO] [stderr]    Compiling mori v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `index`
[INFO] [stdout]   --> src/model/position_buffer.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 |     pub fn index(&mut self) -> &mut Self {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]   --> src/view.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     data: [[Option<char>; WIDTH]; HEIGHT],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tty_control`
[INFO] [stdout]   --> src/view.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     tty_control: TC,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/view/unit_tests/mock_view.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     sut.clear();
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "7909042f3d2e3b2104b702f2be16d4f16318231dfc03623befd33a9ef9b4aaa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7909042f3d2e3b2104b702f2be16d4f16318231dfc03623befd33a9ef9b4aaa1", kill_on_drop: false }`
[INFO] [stdout] 7909042f3d2e3b2104b702f2be16d4f16318231dfc03623befd33a9ef9b4aaa1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1a9858815b28e4dd1af970290d7c40d4d4d6ae356fcc216a322e391de8582a47
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1a9858815b28e4dd1af970290d7c40d4d4d6ae356fcc216a322e391de8582a47", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: associated function is never used: `index`
[INFO] [stdout] running 31 tests
[INFO] [stderr]   --> src/model/position_buffer.rs:70:12
[INFO] [stdout] test model::cursor_position::unit_tests::position::default__returns_col_0_row_0 ... ok
[INFO] [stderr]    |
[INFO] [stdout] test model::position_buffer::unit_tests::delete_grapheme::backward_delete_grapheme_in_empty_buffer_returns_nothing ... ok
[INFO] [stderr] 70 |     pub fn index(&mut self) -> &mut Self {
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::move_down__in_col_0_row_0_yields_col_0_row_1 ... ok
[INFO] [stderr]    |            ^^^^^
[INFO] [stdout] test model::cursor_position::unit_tests::position::new__returns_expected_col_row ... ok
[INFO] [stderr]    |
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::move_left__in_empty_buffer_yields_default_position ... ok
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] test model::position_buffer::unit_tests::delete_grapheme::forward_delete_grapheme_in_sole_grapheme_returns_nothing ... ok
[INFO] [stderr] 
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::move_down__in_empty_buffer_yields_default_position ... ok
[INFO] [stderr] warning: field is never read: `data`
[INFO] [stdout] test model::position_buffer::unit_tests::delete_grapheme::forward_delete_graphme_in_populated_buffer ... ok
[INFO] [stderr]   --> src/view.rs:15:5
[INFO] [stdout] test model::position_buffer::unit_tests::insert_grapheme::insert_grapheme_in_empty_buffer ... ok
[INFO] [stderr]    |
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::move_right__in_col_0_row_0_yields_col_1_row_0 ... ok
[INFO] [stderr] 15 |     data: [[Option<char>; WIDTH]; HEIGHT],
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::move_left__in_col_1_row_0_yields_col_0_row_0 ... ok
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] test model::position_buffer::unit_tests::insert_grapheme::insert_grapheme_in_eol ... ok
[INFO] [stderr] 
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::move_right__in_eol_row_0_yields_bol_row_1 ... ok
[INFO] [stderr] warning: field is never read: `tty_control`
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::move_left__in_col_0_row_1_yields_eol_row_0 ... ok
[INFO] [stderr]   --> src/view.rs:26:5
[INFO] [stdout] test model::utf8_buffer::unit_tests::delete_row::deletes_populated_string_from_2nd_row_yields_deleted_string ... ok
[INFO] [stderr]    |
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::move_up__in_col_0_row_1_yields_col_0_row_0 ... ok
[INFO] [stderr] 26 |     tty_control: TC,
[INFO] [stdout] test model::utf8_buffer::unit_tests::edit_row::return_selected_mut_row ... ok
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] test view::unit_tests::mock_view::new__clears_entire_view ... ok
[INFO] [stderr] 
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::new__returns_position_buffer ... ok
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::move_up__in_empty_buffer_yields_default_position ... ok
[INFO] [stderr]   --> src/view/unit_tests/mock_view.rs:15:5
[INFO] [stdout] test model::utf8_buffer::unit_tests::edit_row::return_selected_mut_grapheme_cluster ... ok
[INFO] [stderr]    |
[INFO] [stdout] test model::utf8_buffer::unit_tests::delete_row::deletes_populated_grapheme_cluster_from_2nd_row_yields_deleted_string ... ok
[INFO] [stderr] 15 |     sut.clear();
[INFO] [stdout] test model::utf8_buffer::unit_tests::delete_row::deletes_empty_string_from_2nd_row_yields_deleted_string ... ok
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stdout] test model::utf8_buffer::unit_tests::new::newly_constructed_utf8_buffer_contains_1_row ... ok
[INFO] [stderr]    |
[INFO] [stdout] test model::position_buffer::unit_tests::insert_grapheme::insert_grapheme_in_mol ... ok
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] test model::position_buffer::unit_tests::delete_grapheme::backward_delete_graphme_in_populated_buffer ... ok
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mori-00757b9e792c52de)
[INFO] [stdout] test model::position_buffer::unit_tests::delete_grapheme::backward_delete_grapheme_in_sole_grapheme_returns_nothing ... ok
[INFO] [stdout] test model::position_buffer::unit_tests::delete_grapheme::forward_delete_grapheme_in_empty_buffer_returns_nothing ... ok
[INFO] [stdout] test model::utf8_buffer::unit_tests::append_row::append_a_row_to_newly_created_buffer_yields_a_buffer_with_2_rows ... ok
[INFO] [stdout] test model::position_buffer::unit_tests::position_buffer::move_right__in_empty_buffer_yields_default_position ... ok
[INFO] [stdout] test model::utf8_buffer::unit_tests::edit_row::return_selected_populated_mut_row ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 31 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1a9858815b28e4dd1af970290d7c40d4d4d6ae356fcc216a322e391de8582a47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a9858815b28e4dd1af970290d7c40d4d4d6ae356fcc216a322e391de8582a47", kill_on_drop: false }`
[INFO] [stdout] 1a9858815b28e4dd1af970290d7c40d4d4d6ae356fcc216a322e391de8582a47