[INFO] fetching crate terminal-emulator 0.1.0...
[INFO] building terminal-emulator-0.1.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate terminal-emulator 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate terminal-emulator 0.1.0
[INFO] finished tweaking crates.io crate terminal-emulator 0.1.0
[INFO] tweaked toml for crates.io crate terminal-emulator 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate terminal-emulator 0.1.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 9 packages to latest compatible versions
[INFO] [stderr]       Adding arraydeque v0.4.5 (available: v0.5.1)
[INFO] [stderr]       Adding base64 v0.10.1 (available: v0.22.1)
[INFO] [stderr]       Adding bitflags v1.3.2 (available: v2.9.4)
[INFO] [stderr]       Adding static_assertions v0.3.4 (available: v1.1.0)
[INFO] [stderr]       Adding unicode-width v0.1.14 (available: v0.2.1)
[INFO] [stderr]       Adding vte v0.3.3 (available: v0.15.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8parse v0.1.1
[INFO] [stderr]   Downloaded static_assertions v0.3.4
[INFO] [stderr]   Downloaded base64 v0.10.1
[INFO] [stderr]   Downloaded vte v0.3.3
[INFO] [stderr]   Downloaded arraydeque v0.4.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 88c93a0a210d74058d7049220997b1b62f30ecf7c969cccc738a92c7c4b3583d
[INFO] running `Command { std: "docker" "start" "-a" "88c93a0a210d74058d7049220997b1b62f30ecf7c969cccc738a92c7c4b3583d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "88c93a0a210d74058d7049220997b1b62f30ecf7c969cccc738a92c7c4b3583d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88c93a0a210d74058d7049220997b1b62f30ecf7c969cccc738a92c7c4b3583d", kill_on_drop: false }`
[INFO] [stdout] 88c93a0a210d74058d7049220997b1b62f30ecf7c969cccc738a92c7c4b3583d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 768bda5672bc61c2b38e7b5bf026fad13a099296ae133d4f4607feccbfb7a788
[INFO] running `Command { std: "docker" "start" "-a" "768bda5672bc61c2b38e7b5bf026fad13a099296ae133d4f4607feccbfb7a788", kill_on_drop: false }`
[INFO] [stderr]    Compiling arraydeque v0.4.5
[INFO] [stderr]    Compiling utf8parse v0.1.1
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling static_assertions v0.3.4
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling vte v0.3.3
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling terminal-emulator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/term/mod.rs:2128:17
[INFO] [stdout]      |
[INFO] [stdout] 2128 | #[cfg(all(test, feature = "bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]      = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]    --> src/term/cell.rs:176:17
[INFO] [stdout]     |
[INFO] [stdout] 176 | #[cfg(all(test, feature = "bench"))]
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]     |
[INFO] [stdout]     = note: no expected values for `feature`
[INFO] [stdout]     = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/term/cell.rs:128:40
[INFO] [stdout]     |
[INFO] [stdout] 128 |             let mut chars = [std::mem::uninitialized(); MAX_ZEROWIDTH_CHARS + 1];
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Region` is never constructed
[INFO] [stdout]    --> src/grid/mod.rs:538:12
[INFO] [stdout]     |
[INFO] [stdout] 538 | pub struct Region<'a, T> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `region` is never used
[INFO] [stdout]    --> src/grid/mod.rs:566:8
[INFO] [stdout]     |
[INFO] [stdout] 564 | pub trait IndexRegion<I, T> {
[INFO] [stdout]     |           ----------- method in this trait
[INFO] [stdout] 565 |     /// Get an immutable region of Self
[INFO] [stdout] 566 |     fn region(&self, _: I) -> Region<'_, T>;
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RegionIter` is never constructed
[INFO] [stdout]    --> src/grid/mod.rs:651:12
[INFO] [stdout]     |
[INFO] [stdout] 651 | pub struct RegionIter<'a, T> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `at` is never read
[INFO] [stdout]    --> src/index.rs:231:13
[INFO] [stdout]     |
[INFO] [stdout] 231 |     Empty { at: Idx },
[INFO] [stdout]     |     -----   ^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/term/mod.rs:966:29
[INFO] [stdout]     |
[INFO] [stdout] 966 |     pub fn renderable_cells(&self) -> RenderableCellsIter {
[INFO] [stdout]     |                             ^^^^^     ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 966 |     pub fn renderable_cells(&self) -> RenderableCellsIter<'_> {
[INFO] [stdout]     |                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `static_assertions::core::num::<impl usize>::saturating_sub` that must be used
[INFO] [stdout]     --> src/term/mod.rs:1253:21
[INFO] [stdout]      |
[INFO] [stdout] 1253 |                     col.saturating_sub(1);
[INFO] [stdout]      |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this returns the result of the operation, without modifying the original
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1253 |                     let _ = col.saturating_sub(1);
[INFO] [stdout]      |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `char` does not permit being left uninitialized
[INFO] [stdout]    --> src/term/cell.rs:128:30
[INFO] [stdout]     |
[INFO] [stdout] 128 |             let mut chars = [std::mem::uninitialized(); MAX_ZEROWIDTH_CHARS + 1];
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              this code causes undefined behavior when executed
[INFO] [stdout]     |                              help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: characters must be a valid Unicode codepoint
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.35s
[INFO] running `Command { std: "docker" "inspect" "768bda5672bc61c2b38e7b5bf026fad13a099296ae133d4f4607feccbfb7a788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "768bda5672bc61c2b38e7b5bf026fad13a099296ae133d4f4607feccbfb7a788", kill_on_drop: false }`
[INFO] [stdout] 768bda5672bc61c2b38e7b5bf026fad13a099296ae133d4f4607feccbfb7a788
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b435ccb6153548f96b0897f3ae6066ca63324576f49d2ac310dc0f32f4266d62
[INFO] running `Command { std: "docker" "start" "-a" "b435ccb6153548f96b0897f3ae6066ca63324576f49d2ac310dc0f32f4266d62", kill_on_drop: false }`
[INFO] [stderr]    Compiling terminal-emulator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/term/mod.rs:2128:17
[INFO] [stdout]      |
[INFO] [stdout] 2128 | #[cfg(all(test, feature = "bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]      = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]    --> src/term/cell.rs:176:17
[INFO] [stdout]     |
[INFO] [stdout] 176 | #[cfg(all(test, feature = "bench"))]
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]     |
[INFO] [stdout]     = note: no expected values for `feature`
[INFO] [stdout]     = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/term/cell.rs:128:40
[INFO] [stdout]     |
[INFO] [stdout] 128 |             let mut chars = [std::mem::uninitialized(); MAX_ZEROWIDTH_CHARS + 1];
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Region` is never constructed
[INFO] [stdout]    --> src/grid/mod.rs:538:12
[INFO] [stdout]     |
[INFO] [stdout] 538 | pub struct Region<'a, T> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `region` is never used
[INFO] [stdout]    --> src/grid/mod.rs:566:8
[INFO] [stdout]     |
[INFO] [stdout] 564 | pub trait IndexRegion<I, T> {
[INFO] [stdout]     |           ----------- method in this trait
[INFO] [stdout] 565 |     /// Get an immutable region of Self
[INFO] [stdout] 566 |     fn region(&self, _: I) -> Region<'_, T>;
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RegionIter` is never constructed
[INFO] [stdout]    --> src/grid/mod.rs:651:12
[INFO] [stdout]     |
[INFO] [stdout] 651 | pub struct RegionIter<'a, T> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `at` is never read
[INFO] [stdout]    --> src/index.rs:231:13
[INFO] [stdout]     |
[INFO] [stdout] 231 |     Empty { at: Idx },
[INFO] [stdout]     |     -----   ^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/term/mod.rs:966:29
[INFO] [stdout]     |
[INFO] [stdout] 966 |     pub fn renderable_cells(&self) -> RenderableCellsIter {
[INFO] [stdout]     |                             ^^^^^     ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 966 |     pub fn renderable_cells(&self) -> RenderableCellsIter<'_> {
[INFO] [stdout]     |                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `static_assertions::core::num::<impl usize>::saturating_sub` that must be used
[INFO] [stdout]     --> src/term/mod.rs:1253:21
[INFO] [stdout]      |
[INFO] [stdout] 1253 |                     col.saturating_sub(1);
[INFO] [stdout]      |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this returns the result of the operation, without modifying the original
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1253 |                     let _ = col.saturating_sub(1);
[INFO] [stdout]      |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `char` does not permit being left uninitialized
[INFO] [stdout]    --> src/term/cell.rs:128:30
[INFO] [stdout]     |
[INFO] [stdout] 128 |             let mut chars = [std::mem::uninitialized(); MAX_ZEROWIDTH_CHARS + 1];
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              this code causes undefined behavior when executed
[INFO] [stdout]     |                              help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: characters must be a valid Unicode codepoint
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]     --> src/term/mod.rs:2128:17
[INFO] [stdout]      |
[INFO] [stdout] 2128 | #[cfg(all(test, feature = "bench"))]
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]      = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]      = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `bench`
[INFO] [stdout]    --> src/term/cell.rs:176:17
[INFO] [stdout]     |
[INFO] [stdout] 176 | #[cfg(all(test, feature = "bench"))]
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]     |
[INFO] [stdout]     = note: no expected values for `feature`
[INFO] [stdout]     = help: consider adding `bench` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/term/cell.rs:128:40
[INFO] [stdout]     |
[INFO] [stdout] 128 |             let mut chars = [std::mem::uninitialized(); MAX_ZEROWIDTH_CHARS + 1];
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Region` is never constructed
[INFO] [stdout]    --> src/grid/mod.rs:538:12
[INFO] [stdout]     |
[INFO] [stdout] 538 | pub struct Region<'a, T> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `region` is never used
[INFO] [stdout]    --> src/grid/mod.rs:566:8
[INFO] [stdout]     |
[INFO] [stdout] 564 | pub trait IndexRegion<I, T> {
[INFO] [stdout]     |           ----------- method in this trait
[INFO] [stdout] 565 |     /// Get an immutable region of Self
[INFO] [stdout] 566 |     fn region(&self, _: I) -> Region<'_, T>;
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RegionIter` is never constructed
[INFO] [stdout]    --> src/grid/mod.rs:651:12
[INFO] [stdout]     |
[INFO] [stdout] 651 | pub struct RegionIter<'a, T> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `at` is never read
[INFO] [stdout]    --> src/index.rs:231:13
[INFO] [stdout]     |
[INFO] [stdout] 231 |     Empty { at: Idx },
[INFO] [stdout]     |     -----   ^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/term/mod.rs:966:29
[INFO] [stdout]     |
[INFO] [stdout] 966 |     pub fn renderable_cells(&self) -> RenderableCellsIter {
[INFO] [stdout]     |                             ^^^^^     ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 966 |     pub fn renderable_cells(&self) -> RenderableCellsIter<'_> {
[INFO] [stdout]     |                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `static_assertions::core::num::<impl usize>::saturating_sub` that must be used
[INFO] [stdout]     --> src/term/mod.rs:1253:21
[INFO] [stdout]      |
[INFO] [stdout] 1253 |                     col.saturating_sub(1);
[INFO] [stdout]      |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this returns the result of the operation, without modifying the original
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1253 |                     let _ = col.saturating_sub(1);
[INFO] [stdout]      |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `char` does not permit being left uninitialized
[INFO] [stdout]    --> src/term/cell.rs:128:30
[INFO] [stdout]     |
[INFO] [stdout] 128 |             let mut chars = [std::mem::uninitialized(); MAX_ZEROWIDTH_CHARS + 1];
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              this code causes undefined behavior when executed
[INFO] [stdout]     |                              help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: characters must be a valid Unicode codepoint
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.83s
[INFO] running `Command { std: "docker" "inspect" "b435ccb6153548f96b0897f3ae6066ca63324576f49d2ac310dc0f32f4266d62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b435ccb6153548f96b0897f3ae6066ca63324576f49d2ac310dc0f32f4266d62", kill_on_drop: false }`
[INFO] [stdout] b435ccb6153548f96b0897f3ae6066ca63324576f49d2ac310dc0f32f4266d62
