metal: Don't skip incomplete binding resources. (#2622)

wgpu-hal/src/metal/command.rs

@@ -74,13 +74,21 @@ impl super::CommandState {
  ) -> Option<(u32, &'a [u32])> {
  let stage_info = &self.stage_infos[stage];
  let slot = stage_info.sizes_slot?;
+
  result_sizes.clear();
- for br in stage_info.sized_bindings.iter() {
- // If it's None, this isn't the right time to update the sizes
- let size = self.storage_buffer_length_map.get(br)?;
- result_sizes.push(size.get().min(!0u32 as u64) as u32);
+ result_sizes.extend(
+ stage_info
+ .sized_bindings
+ .iter()
+ .filter_map(|br| self.storage_buffer_length_map.get(br))
+ .map(|size| size.get().min(!0u32 as u64) as u32),
+ );
+
+ if !result_sizes.is_empty() {
+ Some((slot as _, result_sizes))
+ } else {
+ None
  }
- Some((slot as _, result_sizes))
  }
 }