[INFO] cloning repository https://github.com/mark2b/fb2d
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mark2b/fb2d" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmark2b%2Ffb2d", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fa61032802aa29c138c8e6aaeacd7732c9933691
[INFO] testing mark2b/fb2d against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmark2b%2Ffb2d" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mark2b/fb2d on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mark2b/fb2d
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/mark2b/fb2d
[INFO] tweaked toml for git repo https://github.com/mark2b/fb2d written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/mark2b/fb2d already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memmap v0.5.2
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[INFO] running `Command { std: "docker" "inspect" "5fecdcc8bb99c2ae57a0acc797e7bb545f7686f38a2f0e9adcc48ffe72e829b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fecdcc8bb99c2ae57a0acc797e7bb545f7686f38a2f0e9adcc48ffe72e829b1", kill_on_drop: false }`
[INFO] [stdout] 5fecdcc8bb99c2ae57a0acc797e7bb545f7686f38a2f0e9adcc48ffe72e829b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 69f40aa62fccec5bb1911582be494cbf15cebbd9cb5e094addc0004259adada9
[INFO] running `Command { std: "docker" "start" "-a" "69f40aa62fccec5bb1911582be494cbf15cebbd9cb5e094addc0004259adada9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.39
[INFO] [stderr]    Compiling cc v1.0.9
[INFO] [stderr]    Compiling num-traits v0.2.2
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[INFO] [stderr]    Compiling inflate v0.3.4
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]    Compiling crc v1.7.0
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[INFO] [stderr]    Compiling vergen v0.1.1
[INFO] [stderr]    Compiling rusttype v0.5.2
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.1.2
[INFO] [stderr]    Compiling bzip2-sys v0.1.6
[INFO] [stderr]    Compiling fb2d v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling uuid v0.6.2
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling flate2 v1.0.1
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling bzip2 v0.3.2
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[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/screen_writer.rs:72:6
[INFO] [stdout]    |
[INFO] [stdout] 72 | impl ScreenWriter {}
[INFO] [stdout]    |      ^^^^^^^^^^^^ help: use `dyn`: `dyn ScreenWriter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/node.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |     sprite: Box<Sprite<'a>>,
[INFO] [stdout]    |                 ^^^^^^^^^^ help: use `dyn`: `dyn Sprite<'a>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/scene.rs:17:28
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub writer: Option<Box<ScreenWriter>>,
[INFO] [stdout]    |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn ScreenWriter`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sprite.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<'a> Sprite<'a> {}
[INFO] [stdout]    |          ^^^^^^^^^^ help: use `dyn`: `dyn Sprite<'a>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/texture.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 63 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/scene.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]    |                     ----^^^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:101:29
[INFO] [stdout]     |
[INFO] [stdout] 101 |                         let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:120:21
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:134:29
[INFO] [stdout]     |
[INFO] [stdout] 134 |                         let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:154:21
[INFO] [stdout]     |
[INFO] [stdout] 154 |                 let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:177:29
[INFO] [stdout]     |
[INFO] [stdout] 177 |                         let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> bin/show.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |             let mut fb = fb2d::screen_writer_for_framebuffer("/dev/fb0")?;
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.76s
[INFO] running `Command { std: "docker" "inspect" "69f40aa62fccec5bb1911582be494cbf15cebbd9cb5e094addc0004259adada9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69f40aa62fccec5bb1911582be494cbf15cebbd9cb5e094addc0004259adada9", kill_on_drop: false }`
[INFO] [stdout] 69f40aa62fccec5bb1911582be494cbf15cebbd9cb5e094addc0004259adada9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12ae020acefad66e3c6e0775d105233df20623d5577ec6bb7f8bfd217e39c953
[INFO] running `Command { std: "docker" "start" "-a" "12ae020acefad66e3c6e0775d105233df20623d5577ec6bb7f8bfd217e39c953", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/screen_writer.rs:72:6
[INFO] [stdout]    |
[INFO] [stdout] 72 | impl ScreenWriter {}
[INFO] [stdout]    |      ^^^^^^^^^^^^ help: use `dyn`: `dyn ScreenWriter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/node.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |     sprite: Box<Sprite<'a>>,
[INFO] [stdout]    |                 ^^^^^^^^^^ help: use `dyn`: `dyn Sprite<'a>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/scene.rs:17:28
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub writer: Option<Box<ScreenWriter>>,
[INFO] [stdout]    |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn ScreenWriter`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sprite.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<'a> Sprite<'a> {}
[INFO] [stdout]    |          ^^^^^^^^^^ help: use `dyn`: `dyn Sprite<'a>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/texture.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 63 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/scene.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]    |                     ----^^^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:101:29
[INFO] [stdout]     |
[INFO] [stdout] 101 |                         let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:120:21
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:134:29
[INFO] [stdout]     |
[INFO] [stdout] 134 |                         let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:154:21
[INFO] [stdout]     |
[INFO] [stdout] 154 |                 let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling fb2d v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:177:29
[INFO] [stdout]     |
[INFO] [stdout] 177 |                         let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/screen_writer.rs:72:6
[INFO] [stdout]    |
[INFO] [stdout] 72 | impl ScreenWriter {}
[INFO] [stdout]    |      ^^^^^^^^^^^^ help: use `dyn`: `dyn ScreenWriter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/node.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |     sprite: Box<Sprite<'a>>,
[INFO] [stdout]    |                 ^^^^^^^^^^ help: use `dyn`: `dyn Sprite<'a>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/scene.rs:17:28
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub writer: Option<Box<ScreenWriter>>,
[INFO] [stdout]    |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn ScreenWriter`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/sprite.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<'a> Sprite<'a> {}
[INFO] [stdout]    |          ^^^^^^^^^^ help: use `dyn`: `dyn Sprite<'a>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> bin/show.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |             let mut fb = fb2d::screen_writer_for_framebuffer("/dev/fb0")?;
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> examples/simple_sprite.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |         sprite2,
[INFO] [stdout]    |         ^^^^^^^ expected struct `TextureSprite`, found enum `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `TextureSprite`
[INFO] [stdout]                 found enum `Result<TextureSprite, &str>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/texture.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 63 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fb2d` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/scene.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]    |                     ----^^^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:101:29
[INFO] [stdout]     |
[INFO] [stdout] 101 |                         let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:120:21
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:134:29
[INFO] [stdout]     |
[INFO] [stdout] 134 |                         let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:154:21
[INFO] [stdout]     |
[INFO] [stdout] 154 |                 let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/scene.rs:177:29
[INFO] [stdout]     |
[INFO] [stdout] 177 |                         let mut children_keys = key_cell.borrow_mut();
[INFO] [stdout]     |                             ----^^^^^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "12ae020acefad66e3c6e0775d105233df20623d5577ec6bb7f8bfd217e39c953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12ae020acefad66e3c6e0775d105233df20623d5577ec6bb7f8bfd217e39c953", kill_on_drop: false }`
[INFO] [stdout] 12ae020acefad66e3c6e0775d105233df20623d5577ec6bb7f8bfd217e39c953
