[INFO] updating cached repository grovesNL/gfx-hal-tutorial
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/grovesNL/gfx-hal-tutorial
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/grovesNL/gfx-hal-tutorial" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/grovesNL/gfx-hal-tutorial"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/grovesNL/gfx-hal-tutorial'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/grovesNL/gfx-hal-tutorial" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/grovesNL/gfx-hal-tutorial"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/grovesNL/gfx-hal-tutorial'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6de6fc0c6c2344200c7add72e9955219b68a5b26
[INFO] sha for GitHub repo grovesNL/gfx-hal-tutorial: 6de6fc0c6c2344200c7add72e9955219b68a5b26
[INFO] validating manifest of grovesNL/gfx-hal-tutorial on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of grovesNL/gfx-hal-tutorial on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing grovesNL/gfx-hal-tutorial
[INFO] finished frobbing grovesNL/gfx-hal-tutorial
[INFO] frobbed toml for grovesNL/gfx-hal-tutorial written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/grovesNL/gfx-hal-tutorial/Cargo.toml
[INFO] started frobbing grovesNL/gfx-hal-tutorial
[INFO] finished frobbing grovesNL/gfx-hal-tutorial
[INFO] frobbed toml for grovesNL/gfx-hal-tutorial written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/grovesNL/gfx-hal-tutorial/Cargo.toml
[INFO] crate grovesNL/gfx-hal-tutorial already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking grovesNL/gfx-hal-tutorial against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-2/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/grovesNL/gfx-hal-tutorial:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8d995067a3fb3bdc0a09caece686f14a6735b91a03fe06766c4238c88eeb3f9b
[INFO] running `"docker" "start" "-a" "8d995067a3fb3bdc0a09caece686f14a6735b91a03fe06766c4238c88eeb3f9b"`
[INFO] [stderr]    Compiling glsl-to-spirv v0.1.7
[INFO] [stderr]     Checking gfx-hal v0.1.0 (https://github.com/gfx-rs/gfx#d38c2e4a)
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.4
[INFO] [stderr]     Checking winit v0.18.0
[INFO] [stderr] warning[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/crater/cargo-home/git/checkouts/gfx-e86e7f3ebdbc4218/d38c2e4/src/hal/src/command/render_pass.rs:272:36
[INFO] [stderr]     |
[INFO] [stderr] 229 | impl<'a, B: Backend> RenderPassInlineEncoder<'a, B> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] ...
[INFO] [stderr] 272 |         RenderPassSecondaryEncoder(self.0.cmb)
[INFO] [stderr]     |         ---------------------------^^^^^^^^^^- returning this value requires that `*self.0.cmb` is borrowed for `'a`
[INFO] [stderr] 273 |     }
[INFO] [stderr]     |     - here, drop of `self` needs exclusive access to `*self.0.cmb`, because the type `command::render_pass::RenderPassInlineEncoder<'_, B>` implements the `Drop` trait
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr] warning[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/crater/cargo-home/git/checkouts/gfx-e86e7f3ebdbc4218/d38c2e4/src/hal/src/command/render_pass.rs:347:62
[INFO] [stderr]     |
[INFO] [stderr] 303 | impl<'a, B: Backend> RenderPassSecondaryEncoder<'a, B> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] ...
[INFO] [stderr] 347 |             RenderPassInlineEncoder(RenderSubpassCommon::new(self.0))
[INFO] [stderr]     |             -------------------------------------------------^^^^^^-- returning this value requires that `*self.0` is borrowed for `'a`
[INFO] [stderr] 348 |         }
[INFO] [stderr] 349 |     }
[INFO] [stderr]     |     - here, drop of `self` needs exclusive access to `*self.0`, because the type `command::render_pass::RenderPassSecondaryEncoder<'_, B>` implements the `Drop` trait
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]     Checking gfx-hal-tutorial v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/05_window_surface.rs:32:46
[INFO] [stderr]    |
[INFO] [stderr] 32 |     _command_queues: Vec<queue::CommandQueue<back::Backend, Graphics>>,
[INFO] [stderr]    |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/05_window_surface.rs:33:15
[INFO] [stderr]    |
[INFO] [stderr] 33 |     _device: <back::Backend as Backend>::Device,
[INFO] [stderr]    |               ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/05_window_surface.rs:34:16
[INFO] [stderr]    |
[INFO] [stderr] 34 |     _surface: <back::Backend as Backend>::Surface,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/05_window_surface.rs:35:23
[INFO] [stderr]    |
[INFO] [stderr] 35 |     _adapter: Adapter<back::Backend>,
[INFO] [stderr]    |                       ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/05_window_surface.rs:36:16
[INFO] [stderr]    |
[INFO] [stderr] 36 |     _instance: back::Instance,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/05_window_surface.rs:98:29
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn create_instance() -> back::Instance {
[INFO] [stderr]    |                             ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/05_window_surface.rs:99:9
[INFO] [stderr]    |
[INFO] [stderr] 99 |         back::Instance::create(WINDOW_NAME, 1)
[INFO] [stderr]    |         ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/05_window_surface.rs:102:46
[INFO] [stderr]     |
[INFO] [stderr] 102 |     fn find_queue_families(adapter: &Adapter<back::Backend>) -> QueueFamilyIds {
[INFO] [stderr]     |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/05_window_surface.rs:118:46
[INFO] [stderr]     |
[INFO] [stderr] 118 |     fn is_adapter_suitable(adapter: &Adapter<back::Backend>) -> bool {
[INFO] [stderr]     |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/05_window_surface.rs:122:32
[INFO] [stderr]     |
[INFO] [stderr] 122 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/05_window_surface.rs:122:59
[INFO] [stderr]     |
[INFO] [stderr] 122 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                                           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/05_window_surface.rs:133:20
[INFO] [stderr]     |
[INFO] [stderr] 133 |         instance: &back::Instance,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/05_window_surface.rs:135:11
[INFO] [stderr]     |
[INFO] [stderr] 135 |     ) -> <back::Backend as Backend>::Surface {
[INFO] [stderr]     |           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/05_window_surface.rs:141:31
[INFO] [stderr]     |
[INFO] [stderr] 141 |         adapter: &mut Adapter<back::Backend>,
[INFO] [stderr]     |                               ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/05_window_surface.rs:142:20
[INFO] [stderr]     |
[INFO] [stderr] 142 |         surface: &<back::Backend as Backend>::Surface,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/05_window_surface.rs:144:10
[INFO] [stderr]     |
[INFO] [stderr] 144 |         <back::Backend as Backend>::Device,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/05_window_surface.rs:145:33
[INFO] [stderr]     |
[INFO] [stderr] 145 |         Vec<queue::CommandQueue<back::Backend, Graphics>>,
[INFO] [stderr]     |                                 ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Instance`
[INFO] [stderr]   --> src/05_window_surface.rs:12:67
[INFO] [stderr]    |
[INFO] [stderr] 12 |     queue, Adapter, Backend, Capability, Features, Gpu, Graphics, Instance, PhysicalDevice,
[INFO] [stderr]    |                                                                   ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PhysicalDevice`
[INFO] [stderr]   --> src/05_window_surface.rs:12:77
[INFO] [stderr]    |
[INFO] [stderr] 12 |     queue, Adapter, Backend, Capability, Features, Gpu, Graphics, Instance, PhysicalDevice,
[INFO] [stderr]    |                                                                             ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `QueueFamily`
[INFO] [stderr]   --> src/05_window_surface.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     QueueFamily, Surface,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Surface`
[INFO] [stderr]   --> src/05_window_surface.rs:13:18
[INFO] [stderr]    |
[INFO] [stderr] 13 |     QueueFamily, Surface,
[INFO] [stderr]    |                  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 17 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: Could not compile `gfx-hal-tutorial`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:37:20
[INFO] [stderr]    |
[INFO] [stderr] 37 |     gfx_pipeline: <back::Backend as Backend>::GraphicsPipeline,
[INFO] [stderr]    |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:38:34
[INFO] [stderr]    |
[INFO] [stderr] 38 |     descriptor_set_layouts: Vec<<back::Backend as Backend>::DescriptorSetLayout>,
[INFO] [stderr]    |                                  ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:39:23
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pipeline_layout: <back::Backend as Backend>::PipelineLayout,
[INFO] [stderr]    |                       ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:40:19
[INFO] [stderr]    |
[INFO] [stderr] 40 |     render_pass: <back::Backend as Backend>::RenderPass,
[INFO] [stderr]    |                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:42:10
[INFO] [stderr]    |
[INFO] [stderr] 42 |         <back::Backend as Backend>::Image,
[INFO] [stderr]    |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:43:10
[INFO] [stderr]    |
[INFO] [stderr] 43 |         <back::Backend as Backend>::ImageView,
[INFO] [stderr]    |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 |     swapchain: <back::Backend as Backend>::Swapchain,
[INFO] [stderr]    |                 ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:47:46
[INFO] [stderr]    |
[INFO] [stderr] 47 |     _command_queues: Vec<queue::CommandQueue<back::Backend, Graphics>>,
[INFO] [stderr]    |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:48:14
[INFO] [stderr]    |
[INFO] [stderr] 48 |     device: <back::Backend as Backend>::Device,
[INFO] [stderr]    |              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:49:16
[INFO] [stderr]    |
[INFO] [stderr] 49 |     _surface: <back::Backend as Backend>::Surface,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:50:23
[INFO] [stderr]    |
[INFO] [stderr] 50 |     _adapter: Adapter<back::Backend>,
[INFO] [stderr]    |                       ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:51:16
[INFO] [stderr]    |
[INFO] [stderr] 51 |     _instance: back::Instance,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:146:29
[INFO] [stderr]     |
[INFO] [stderr] 146 |     fn create_instance() -> back::Instance {
[INFO] [stderr]     |                             ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:147:9
[INFO] [stderr]     |
[INFO] [stderr] 147 |         back::Instance::create(WINDOW_NAME, 1)
[INFO] [stderr]     |         ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:150:46
[INFO] [stderr]     |
[INFO] [stderr] 150 |     fn find_queue_families(adapter: &Adapter<back::Backend>) -> QueueFamilyIds {
[INFO] [stderr]     |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:166:46
[INFO] [stderr]     |
[INFO] [stderr] 166 |     fn is_adapter_suitable(adapter: &Adapter<back::Backend>) -> bool {
[INFO] [stderr]     |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:170:32
[INFO] [stderr]     |
[INFO] [stderr] 170 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:170:59
[INFO] [stderr]     |
[INFO] [stderr] 170 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                                           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:181:20
[INFO] [stderr]     |
[INFO] [stderr] 181 |         instance: &back::Instance,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:183:11
[INFO] [stderr]     |
[INFO] [stderr] 183 |     ) -> <back::Backend as Backend>::Surface {
[INFO] [stderr]     |           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:188:31
[INFO] [stderr]     |
[INFO] [stderr] 188 |         adapter: &mut Adapter<back::Backend>,
[INFO] [stderr]     |                               ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:189:20
[INFO] [stderr]     |
[INFO] [stderr] 189 |         surface: &<back::Backend as Backend>::Surface,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:191:10
[INFO] [stderr]     |
[INFO] [stderr] 191 |         <back::Backend as Backend>::Device,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:192:33
[INFO] [stderr]     |
[INFO] [stderr] 192 |         Vec<queue::CommandQueue<back::Backend, Graphics>>,
[INFO] [stderr]     |                                 ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:224:27
[INFO] [stderr]     |
[INFO] [stderr] 224 |         adapter: &Adapter<back::Backend>,
[INFO] [stderr]     |                           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:225:19
[INFO] [stderr]     |
[INFO] [stderr] 225 |         device: &<back::Backend as Backend>::Device,
[INFO] [stderr]     |                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:226:24
[INFO] [stderr]     |
[INFO] [stderr] 226 |         surface: &mut <back::Backend as Backend>::Surface,
[INFO] [stderr]     |                        ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:227:37
[INFO] [stderr]     |
[INFO] [stderr] 227 |         previous_swapchain: Option<<back::Backend as Backend>::Swapchain>,
[INFO] [stderr]     |                                     ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:229:10
[INFO] [stderr]     |
[INFO] [stderr] 229 |         <back::Backend as Backend>::Swapchain,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:231:20
[INFO] [stderr]     |
[INFO] [stderr] 231 |         Backbuffer<back::Backend>,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:257:32
[INFO] [stderr]     |
[INFO] [stderr] 257 |         backbuffer: Backbuffer<back::Backend>,
[INFO] [stderr]     |                                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:259:19
[INFO] [stderr]     |
[INFO] [stderr] 259 |         device: &<back::Backend as Backend>::Device,
[INFO] [stderr]     |                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:261:10
[INFO] [stderr]     |
[INFO] [stderr] 261 |         <back::Backend as Backend>::Image,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:262:10
[INFO] [stderr]     |
[INFO] [stderr] 262 |         <back::Backend as Backend>::ImageView,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:291:19
[INFO] [stderr]     |
[INFO] [stderr] 291 |         device: &<back::Backend as Backend>::Device,
[INFO] [stderr]     |                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:293:11
[INFO] [stderr]     |
[INFO] [stderr] 293 |     ) -> <back::Backend as Backend>::RenderPass {
[INFO] [stderr]     |           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:331:19
[INFO] [stderr]     |
[INFO] [stderr] 331 |         device: &<back::Backend as Backend>::Device,
[INFO] [stderr]     |                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:333:24
[INFO] [stderr]     |
[INFO] [stderr] 333 |         render_pass: &<back::Backend as Backend>::RenderPass,
[INFO] [stderr]     |                        ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:335:14
[INFO] [stderr]     |
[INFO] [stderr] 335 |         Vec<<back::Backend as Backend>::DescriptorSetLayout>,
[INFO] [stderr]     |              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:336:10
[INFO] [stderr]     |
[INFO] [stderr] 336 |         <back::Backend as Backend>::PipelineLayout,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:337:10
[INFO] [stderr]     |
[INFO] [stderr] 337 |         <back::Backend as Backend>::GraphicsPipeline,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:366:35
[INFO] [stderr]     |
[INFO] [stderr] 366 |                 pso::EntryPoint::<back::Backend> {
[INFO] [stderr]     |                                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:374:35
[INFO] [stderr]     |
[INFO] [stderr] 374 |                 pso::EntryPoint::<back::Backend> {
[INFO] [stderr]     |                                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:453:45
[INFO] [stderr]     |
[INFO] [stderr] 453 |             let immutable_samplers = Vec::<<back::Backend as Backend>::Sampler>::new();
[INFO] [stderr]     |                                             ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/12_graphics_pipeline_complete.rs:454:34
[INFO] [stderr]     |
[INFO] [stderr] 454 |             let ds_layouts: Vec<<back::Backend as Backend>::DescriptorSetLayout> = vec![device
[INFO] [stderr]     |                                  ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Device`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:13:88
[INFO] [stderr]    |
[INFO] [stderr] 13 |     format, image, pass, pso, queue, window, Adapter, Backbuffer, Backend, Capability, Device,
[INFO] [stderr]    |                                                                                        ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Instance`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:14:30
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Features, Gpu, Graphics, Instance, PhysicalDevice, Primitive, QueueFamily, Surface,
[INFO] [stderr]    |                              ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PhysicalDevice`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:14:40
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Features, Gpu, Graphics, Instance, PhysicalDevice, Primitive, QueueFamily, Surface,
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `QueueFamily`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:14:67
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Features, Gpu, Graphics, Instance, PhysicalDevice, Primitive, QueueFamily, Surface,
[INFO] [stderr]    |                                                                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Surface`
[INFO] [stderr]   --> src/12_graphics_pipeline_complete.rs:14:80
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Features, Gpu, Graphics, Instance, PhysicalDevice, Primitive, QueueFamily, Surface,
[INFO] [stderr]    |                                                                                ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 45 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: Could not compile `gfx-hal-tutorial`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/01_instance_creation.rs:26:16
[INFO] [stderr]    |
[INFO] [stderr] 26 |     _instance: back::Instance,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/01_instance_creation.rs:68:29
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn create_instance() -> back::Instance {
[INFO] [stderr]    |                             ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/01_instance_creation.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 |         back::Instance::create(WINDOW_NAME, 1)
[INFO] [stderr]    |         ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/09_shader_modules.rs:37:10
[INFO] [stderr]    |
[INFO] [stderr] 37 |         <back::Backend as Backend>::Image,
[INFO] [stderr]    |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/09_shader_modules.rs:38:10
[INFO] [stderr]    |
[INFO] [stderr] 38 |         <back::Backend as Backend>::ImageView,
[INFO] [stderr]    |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/09_shader_modules.rs:41:17
[INFO] [stderr]    |
[INFO] [stderr] 41 |     swapchain: <back::Backend as Backend>::Swapchain,
[INFO] [stderr]    |                 ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/09_shader_modules.rs:42:46
[INFO] [stderr]    |
[INFO] [stderr] 42 |     _command_queues: Vec<queue::CommandQueue<back::Backend, Graphics>>,
[INFO] [stderr]    |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/09_shader_modules.rs:43:14
[INFO] [stderr]    |
[INFO] [stderr] 43 |     device: <back::Backend as Backend>::Device,
[INFO] [stderr]    |              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/09_shader_modules.rs:44:16
[INFO] [stderr]    |
[INFO] [stderr] 44 |     _surface: <back::Backend as Backend>::Surface,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/09_shader_modules.rs:45:23
[INFO] [stderr]    |
[INFO] [stderr] 45 |     _adapter: Adapter<back::Backend>,
[INFO] [stderr]    |                       ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/09_shader_modules.rs:46:16
[INFO] [stderr]    |
[INFO] [stderr] 46 |     _instance: back::Instance,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:123:29
[INFO] [stderr]     |
[INFO] [stderr] 123 |     fn create_instance() -> back::Instance {
[INFO] [stderr]     |                             ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:124:9
[INFO] [stderr]     |
[INFO] [stderr] 124 |         back::Instance::create(WINDOW_NAME, 1)
[INFO] [stderr]     |         ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:127:46
[INFO] [stderr]     |
[INFO] [stderr] 127 |     fn find_queue_families(adapter: &Adapter<back::Backend>) -> QueueFamilyIds {
[INFO] [stderr]     |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:143:46
[INFO] [stderr]     |
[INFO] [stderr] 143 |     fn is_adapter_suitable(adapter: &Adapter<back::Backend>) -> bool {
[INFO] [stderr]     |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:147:32
[INFO] [stderr]     |
[INFO] [stderr] 147 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:147:59
[INFO] [stderr]     |
[INFO] [stderr] 147 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                                           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:158:20
[INFO] [stderr]     |
[INFO] [stderr] 158 |         instance: &back::Instance,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:160:11
[INFO] [stderr]     |
[INFO] [stderr] 160 |     ) -> <back::Backend as Backend>::Surface {
[INFO] [stderr]     |           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:165:31
[INFO] [stderr]     |
[INFO] [stderr] 165 |         adapter: &mut Adapter<back::Backend>,
[INFO] [stderr]     |                               ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:166:20
[INFO] [stderr]     |
[INFO] [stderr] 166 |         surface: &<back::Backend as Backend>::Surface,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:168:10
[INFO] [stderr]     |
[INFO] [stderr] 168 |         <back::Backend as Backend>::Device,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:169:33
[INFO] [stderr]     |
[INFO] [stderr] 169 |         Vec<queue::CommandQueue<back::Backend, Graphics>>,
[INFO] [stderr]     |                                 ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:201:27
[INFO] [stderr]     |
[INFO] [stderr] 201 |         adapter: &Adapter<back::Backend>,
[INFO] [stderr]     |                           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:202:19
[INFO] [stderr]     |
[INFO] [stderr] 202 |         device: &<back::Backend as Backend>::Device,
[INFO] [stderr]     |                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:203:24
[INFO] [stderr]     |
[INFO] [stderr] 203 |         surface: &mut <back::Backend as Backend>::Surface,
[INFO] [stderr]     |                        ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:204:37
[INFO] [stderr]     |
[INFO] [stderr] 204 |         previous_swapchain: Option<<back::Backend as Backend>::Swapchain>,
[INFO] [stderr]     |                                     ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:206:10
[INFO] [stderr]     |
[INFO] [stderr] 206 |         <back::Backend as Backend>::Swapchain,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:207:20
[INFO] [stderr]     |
[INFO] [stderr] 207 |         Backbuffer<back::Backend>,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:233:32
[INFO] [stderr]     |
[INFO] [stderr] 233 |         backbuffer: Backbuffer<back::Backend>,
[INFO] [stderr]     |                                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:235:19
[INFO] [stderr]     |
[INFO] [stderr] 235 |         device: &<back::Backend as Backend>::Device,
[INFO] [stderr]     |                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:237:10
[INFO] [stderr]     |
[INFO] [stderr] 237 |         <back::Backend as Backend>::Image,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:238:10
[INFO] [stderr]     |
[INFO] [stderr] 238 |         <back::Backend as Backend>::ImageView,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/09_shader_modules.rs:267:43
[INFO] [stderr]     |
[INFO] [stderr] 267 |     fn create_graphics_pipeline(device: &<back::Backend as Backend>::Device) {
[INFO] [stderr]     |                                           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: Could not compile `gfx-hal-tutorial`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/04_logical_device.rs:32:46
[INFO] [stderr]    |
[INFO] [stderr] 32 |     _command_queues: Vec<queue::CommandQueue<back::Backend, Graphics>>,
[INFO] [stderr]    |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/04_logical_device.rs:33:15
[INFO] [stderr]    |
[INFO] [stderr] 33 |     _device: <back::Backend as Backend>::Device,
[INFO] [stderr]    |               ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/04_logical_device.rs:34:23
[INFO] [stderr]    |
[INFO] [stderr] 34 |     _adapter: Adapter<back::Backend>,
[INFO] [stderr]    |                       ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/04_logical_device.rs:35:16
[INFO] [stderr]    |
[INFO] [stderr] 35 |     _instance: back::Instance,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/04_logical_device.rs:94:29
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn create_instance() -> back::Instance {
[INFO] [stderr]    |                             ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/04_logical_device.rs:95:9
[INFO] [stderr]    |
[INFO] [stderr] 95 |         back::Instance::create(WINDOW_NAME, 1)
[INFO] [stderr]    |         ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/04_logical_device.rs:98:46
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn find_queue_families(adapter: &Adapter<back::Backend>) -> QueueFamilyIds {
[INFO] [stderr]    |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/04_logical_device.rs:114:46
[INFO] [stderr]     |
[INFO] [stderr] 114 |     fn is_adapter_suitable(adapter: &Adapter<back::Backend>) -> bool {
[INFO] [stderr]     |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/04_logical_device.rs:118:32
[INFO] [stderr]     |
[INFO] [stderr] 118 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/04_logical_device.rs:118:59
[INFO] [stderr]     |
[INFO] [stderr] 118 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                                           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/04_logical_device.rs:129:31
[INFO] [stderr]     |
[INFO] [stderr] 129 |         adapter: &mut Adapter<back::Backend>,
[INFO] [stderr]     |                               ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/04_logical_device.rs:131:10
[INFO] [stderr]     |
[INFO] [stderr] 131 |         <back::Backend as Backend>::Device,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/04_logical_device.rs:132:33
[INFO] [stderr]     |
[INFO] [stderr] 132 |         Vec<queue::CommandQueue<back::Backend, Graphics>>,
[INFO] [stderr]     |                                 ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Device`
[INFO] [stderr]   --> src/09_shader_modules.rs:13:77
[INFO] [stderr]    |
[INFO] [stderr] 13 |     format, image, queue, window, Adapter, Backbuffer, Backend, Capability, Device, Features, Gpu,
[INFO] [stderr]    |                                                                             ^^^^^^
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/03_physical_device_selection.rs:29:23
[INFO] [stderr]    |
[INFO] [stderr] 29 |     _adapter: Adapter<back::Backend>,
[INFO] [stderr]    |                       ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/03_physical_device_selection.rs:30:16
[INFO] [stderr]    |
[INFO] [stderr] 30 |     _instance: back::Instance,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/03_physical_device_selection.rs:85:29
[INFO] [stderr]    |
[INFO] [stderr] 85 |     fn create_instance() -> back::Instance {
[INFO] [stderr]    |                             ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/03_physical_device_selection.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 |         back::Instance::create(WINDOW_NAME, 1)
[INFO] [stderr]    |         ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/03_physical_device_selection.rs:89:46
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn find_queue_families(adapter: &Adapter<back::Backend>) -> QueueFamilyIds {
[INFO] [stderr]    |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/03_physical_device_selection.rs:105:46
[INFO] [stderr]     |
[INFO] [stderr] 105 |     fn is_adapter_suitable(adapter: &Adapter<back::Backend>) -> bool {
[INFO] [stderr]     |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/03_physical_device_selection.rs:109:32
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/03_physical_device_selection.rs:109:59
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                                           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Instance`
[INFO] [stderr]   --> src/09_shader_modules.rs:14:15
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Graphics, Instance, PhysicalDevice, QueueFamily, Surface, SwapchainConfig,
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PhysicalDevice`
[INFO] [stderr]   --> src/09_shader_modules.rs:14:25
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Graphics, Instance, PhysicalDevice, QueueFamily, Surface, SwapchainConfig,
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `QueueFamily`
[INFO] [stderr]   --> src/09_shader_modules.rs:14:41
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Graphics, Instance, PhysicalDevice, QueueFamily, Surface, SwapchainConfig,
[INFO] [stderr]    |                                         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Surface`
[INFO] [stderr]   --> src/09_shader_modules.rs:14:54
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Graphics, Instance, PhysicalDevice, QueueFamily, Surface, SwapchainConfig,
[INFO] [stderr]    |                                                      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 31 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: Could not compile `gfx-hal-tutorial`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:35:10
[INFO] [stderr]    |
[INFO] [stderr] 35 |         <back::Backend as Backend>::Image,
[INFO] [stderr]    |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:36:10
[INFO] [stderr]    |
[INFO] [stderr] 36 |         <back::Backend as Backend>::ImageView,
[INFO] [stderr]    |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:39:17
[INFO] [stderr]    |
[INFO] [stderr] 39 |     swapchain: <back::Backend as Backend>::Swapchain,
[INFO] [stderr]    |                 ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:40:46
[INFO] [stderr]    |
[INFO] [stderr] 40 |     _command_queues: Vec<queue::CommandQueue<back::Backend, Graphics>>,
[INFO] [stderr]    |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:41:14
[INFO] [stderr]    |
[INFO] [stderr] 41 |     device: <back::Backend as Backend>::Device,
[INFO] [stderr]    |              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:42:16
[INFO] [stderr]    |
[INFO] [stderr] 42 |     _surface: <back::Backend as Backend>::Surface,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:43:23
[INFO] [stderr]    |
[INFO] [stderr] 43 |     _adapter: Adapter<back::Backend>,
[INFO] [stderr]    |                       ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:44:16
[INFO] [stderr]    |
[INFO] [stderr] 44 |     _instance: back::Instance,
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:121:29
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn create_instance() -> back::Instance {
[INFO] [stderr]     |                             ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:122:9
[INFO] [stderr]     |
[INFO] [stderr] 122 |         back::Instance::create(WINDOW_NAME, 1)
[INFO] [stderr]     |         ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:125:46
[INFO] [stderr]     |
[INFO] [stderr] 125 |     fn find_queue_families(adapter: &Adapter<back::Backend>) -> QueueFamilyIds {
[INFO] [stderr]     |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:141:46
[INFO] [stderr]     |
[INFO] [stderr] 141 |     fn is_adapter_suitable(adapter: &Adapter<back::Backend>) -> bool {
[INFO] [stderr]     |                                              ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:145:32
[INFO] [stderr]     |
[INFO] [stderr] 145 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:145:59
[INFO] [stderr]     |
[INFO] [stderr] 145 |     fn pick_adapter(instance: &back::Instance) -> Adapter<back::Backend> {
[INFO] [stderr]     |                                                           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:156:20
[INFO] [stderr]     |
[INFO] [stderr] 156 |         instance: &back::Instance,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:158:11
[INFO] [stderr]     |
[INFO] [stderr] 158 |     ) -> <back::Backend as Backend>::Surface {
[INFO] [stderr]     |           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:163:31
[INFO] [stderr]     |
[INFO] [stderr] 163 |         adapter: &mut Adapter<back::Backend>,
[INFO] [stderr]     |                               ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:164:20
[INFO] [stderr]     |
[INFO] [stderr] 164 |         surface: &<back::Backend as Backend>::Surface,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:166:10
[INFO] [stderr]     |
[INFO] [stderr] 166 |         <back::Backend as Backend>::Device,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:167:33
[INFO] [stderr]     |
[INFO] [stderr] 167 |         Vec<queue::CommandQueue<back::Backend, Graphics>>,
[INFO] [stderr]     |                                 ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:199:27
[INFO] [stderr]     |
[INFO] [stderr] 199 |         adapter: &Adapter<back::Backend>,
[INFO] [stderr]     |                           ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:200:19
[INFO] [stderr]     |
[INFO] [stderr] 200 |         device: &<back::Backend as Backend>::Device,
[INFO] [stderr]     |                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:201:24
[INFO] [stderr]     |
[INFO] [stderr] 201 |         surface: &mut <back::Backend as Backend>::Surface,
[INFO] [stderr]     |                        ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:202:37
[INFO] [stderr]     |
[INFO] [stderr] 202 |         previous_swapchain: Option<<back::Backend as Backend>::Swapchain>,
[INFO] [stderr]     |                                     ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:204:10
[INFO] [stderr]     |
[INFO] [stderr] 204 |         <back::Backend as Backend>::Swapchain,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:205:20
[INFO] [stderr]     |
[INFO] [stderr] 205 |         Backbuffer<back::Backend>,
[INFO] [stderr]     |                    ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:231:32
[INFO] [stderr]     |
[INFO] [stderr] 231 |         backbuffer: Backbuffer<back::Backend>,
[INFO] [stderr]     |                                ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:233:19
[INFO] [stderr]     |
[INFO] [stderr] 233 |         device: &<back::Backend as Backend>::Device,
[INFO] [stderr]     |                   ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:235:10
[INFO] [stderr]     |
[INFO] [stderr] 235 |         <back::Backend as Backend>::Image,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `back`
[INFO] [stderr]    --> src/08_graphics_pipeline.rs:236:10
[INFO] [stderr]     |
[INFO] [stderr] 236 |         <back::Backend as Backend>::ImageView,
[INFO] [stderr]     |          ^^^^ use of undeclared type or module `back`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Instance`
[INFO] [stderr]   --> src/04_logical_device.rs:12:67
[INFO] [stderr]    |
[INFO] [stderr] 12 |     queue, Adapter, Backend, Capability, Features, Gpu, Graphics, Instance, PhysicalDevice,
[INFO] [stderr]    |                                                                   ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PhysicalDevice`
[INFO] [stderr]   --> src/04_logical_device.rs:12:77
[INFO] [stderr]    |
[INFO] [stderr] 12 |     queue, Adapter, Backend, Capability, Features, Gpu, Graphics, Instance, PhysicalDevice,
[INFO] [stderr]    |                                                                             ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `QueueFamily`
[INFO] [stderr]   --> src/04_logical_device.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     QueueFamily,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 13 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: Could not compile `gfx-hal-tutorial`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused import: `Instance`
[INFO] [stderr]   --> src/03_physical_device_selection.rs:11:27
[INFO] [stderr]    |
[INFO] [stderr] 11 | use hal::{queue, Adapter, Instance, QueueFamily};
[INFO] [stderr]    |                           ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `QueueFamily`
[INFO] [stderr]   --> src/03_physical_device_selection.rs:11:37
[INFO] [stderr]    |
[INFO] [stderr] 11 | use hal::{queue, Adapter, Instance, QueueFamily};
[INFO] [stderr]    |                                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 8 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: Could not compile `gfx-hal-tutorial`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused import: `Device`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:12:77
[INFO] [stderr]    |
[INFO] [stderr] 12 |     format, image, queue, window, Adapter, Backbuffer, Backend, Capability, Device, Features, Gpu,
[INFO] [stderr]    |                                                                             ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Instance`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:13:15
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Graphics, Instance, PhysicalDevice, QueueFamily, Surface, SwapchainConfig,
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PhysicalDevice`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:13:25
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Graphics, Instance, PhysicalDevice, QueueFamily, Surface, SwapchainConfig,
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `QueueFamily`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:13:41
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Graphics, Instance, PhysicalDevice, QueueFamily, Surface, SwapchainConfig,
[INFO] [stderr]    |                                         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Surface`
[INFO] [stderr]   --> src/08_graphics_pipeline.rs:13:54
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Graphics, Instance, PhysicalDevice, QueueFamily, Surface, SwapchainConfig,
[INFO] [stderr]    |                                                      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 30 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: Could not compile `gfx-hal-tutorial`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8d995067a3fb3bdc0a09caece686f14a6735b91a03fe06766c4238c88eeb3f9b"`
[INFO] running `"docker" "rm" "-f" "8d995067a3fb3bdc0a09caece686f14a6735b91a03fe06766c4238c88eeb3f9b"`
[INFO] [stdout] 8d995067a3fb3bdc0a09caece686f14a6735b91a03fe06766c4238c88eeb3f9b