Fix dropping Device if not using indirect validation (#6681)

CHANGELOG.md

@@ -160,6 +160,7 @@ By @ErichDonGubler in [#6456](https://github.com/gfx-rs/wgpu/pull/6456), [#6148]
   - Check that begin and end indices are not equal.
   - Check that at least one index is specified.
 - Reject destroyed buffers in query set resolution. By @ErichDonGubler in [#6579](https://github.com/gfx-rs/wgpu/pull/6579).
+- Fix panic when dropping `Device` on some environments. By @Dinnerbone in [#6681](https://github.com/gfx-rs/wgpu/pull/6681).
 
 #### Naga
 

wgpu-core/src/device/resource.rs

@@ -154,10 +154,9 @@ impl Drop for Device {
         // SAFETY: We are in the Drop impl and we don't use self.fence anymore after this point.
         let fence = unsafe { ManuallyDrop::take(&mut self.fence.write()) };
         #[cfg(feature = "indirect-validation")]
-        self.indirect_validation
-            .take()
-            .unwrap()
-            .dispose(self.raw.as_ref());
+        if let Some(indirect_validation) = self.indirect_validation.take() {
+            indirect_validation.dispose(self.raw.as_ref());
+        }
         unsafe {
             self.raw.destroy_buffer(zero_buffer);
             self.raw.destroy_fence(fence);