Don't raise AlreadyDestroyed error on repeated destroy() calls (#7686)

* Don't raise `AlreadyDestroyed` error on repeated `destroy()` calls

* Add changelog entry

CHANGELOG.md

@@ -80,6 +80,7 @@ Naga now infers the correct binding layout when a resource appears only in an as
 #### General
 
 - Removed `MaintainBase` in favor of using `PollType`. By @waywardmonkeys in [#7508](https://github.com/gfx-rs/wgpu/pull/7508).
+- wgpu-core no longer raises an error if `destroy` is called multiple times for a buffer or texture. This only affects the wgpu-core API; the wgpu API already allowed multiple `destroy` calls. By @andyleiserson in [#7686](https://github.com/gfx-rs/wgpu/pull/7686).
 
 #### Naga
 

wgpu-core/src/resource.rs

@@ -713,7 +713,8 @@ impl Buffer {
             let raw = match self.raw.snatch(&mut snatch_guard) {
                 Some(raw) => raw,
                 None => {
-                    return Err(DestroyError::AlreadyDestroyed);
+                    // Per spec, it is valid to call `destroy` multiple times.
+                    return Ok(());
                 }
             };
 
@@ -1189,7 +1190,8 @@ impl Texture {
                     return Ok(());
                 }
                 None => {
-                    return Err(DestroyError::AlreadyDestroyed);
+                    // Per spec, it is valid to call `destroy` multiple times.
+                    return Ok(());
                 }
             };
 
@@ -1953,8 +1955,6 @@ impl QuerySet {
 #[derive(Clone, Debug, Error)]
 #[non_exhaustive]
 pub enum DestroyError {
-    #[error("Resource is already destroyed")]
-    AlreadyDestroyed,
     #[error(transparent)]
     InvalidResource(#[from] InvalidResourceError),
 }