Examples panic on Wayland

[eero-lehtinen]

After 04ca85a, examples crash for me on Wayland. I'm not sure what the reason is but they work fine before that commit. I'm using Gnome and Nvidia.

Output:

❯ RUST_BACKTRACE=1 cargo run --example custom_cursors
    Finished dev [unoptimized + debuginfo] target(s) in 0.05s
     Running `target/debug/examples/custom_cursors`
wl_shm_pool@31: error 1: invalid width, height or stride (0x44, 0)
Protocol error 1 on object wl_shm_pool@31: 
thread 'main' panicked at examples/util/fill.rs:33:53:
Failed to create a softbuffer context: PlatformError(Some("Failed to make round trip to server"), Some(Backend(Protocol(ProtocolError { code: 1, object_id: 31, object_interface: "wl_shm_pool", message: "" }))))
stack backtrace:
   0: rust_begin_unwind
             at /rustc/a28077b28a02b92985b3a3faecf92813155f1ea1/library/std/src/panicking.rs:597:5
   1: core::panicking::panic_fmt
             at /rustc/a28077b28a02b92985b3a3faecf92813155f1ea1/library/core/src/panicking.rs:72:14
   2: core::result::unwrap_failed
             at /rustc/a28077b28a02b92985b3a3faecf92813155f1ea1/library/core/src/result.rs:1652:5
   3: core::result::Result<T,E>::expect
             at /rustc/a28077b28a02b92985b3a3faecf92813155f1ea1/library/core/src/result.rs:1034:23
   4: custom_cursors::fill::fill_window::GraphicsContext::new
             at ./examples/util/fill.rs:33:26
   5: custom_cursors::fill::fill_window::{{closure}}::{{closure}}
             at ./examples/util/fill.rs:66:36
   6: core::option::Option<T>::get_or_insert_with
             at /rustc/a28077b28a02b92985b3a3faecf92813155f1ea1/library/core/src/option.rs:1666:26
   7: custom_cursors::fill::fill_window::{{closure}}
             at ./examples/util/fill.rs:65:23
   8: std::thread::local::LocalKey<T>::try_with
             at /rustc/a28077b28a02b92985b3a3faecf92813155f1ea1/library/std/src/thread/local.rs:270:16
   9: std::thread::local::LocalKey<T>::with
             at /rustc/a28077b28a02b92985b3a3faecf92813155f1ea1/library/std/src/thread/local.rs:246:9
  10: custom_cursors::fill::fill_window
             at ./examples/util/fill.rs:55:5
  11: custom_cursors::main::{{closure}}
             at ./examples/custom_cursors.rs:79:17
  12: core::ops::function::impls::<impl core::ops::function::FnMut<A> for &mut F>::call_mut
             at /rustc/a28077b28a02b92985b3a3faecf92813155f1ea1/library/core/src/ops/function.rs:294:13
  13: winit::platform_impl::platform::wayland::event_loop::EventLoop<T>::single_iteration
             at ./src/platform_impl/linux/wayland/event_loop/mod.rs:504:17
  14: winit::platform_impl::platform::wayland::event_loop::EventLoop<T>::pump_events
             at ./src/platform_impl/linux/wayland/event_loop/mod.rs:231:13
  15: winit::platform_impl::platform::wayland::event_loop::EventLoop<T>::run_on_demand
             at ./src/platform_impl/linux/wayland/event_loop/mod.rs:201:19
  16: winit::platform_impl::platform::EventLoop<T>::run_on_demand
             at ./src/platform_impl/linux/mod.rs:828:56
  17: winit::platform_impl::platform::EventLoop<T>::run
             at ./src/platform_impl/linux/mod.rs:821:9
  18: winit::event_loop::EventLoop<T>::run
             at ./src/event_loop.rs:249:9
  19: custom_cursors::main
             at ./examples/custom_cursors.rs:50:5
  20: core::ops::function::FnOnce::call_once
             at /rustc/a28077b28a02b92985b3a3faecf92813155f1ea1/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.