Fix memory leak with XR combined occlusion meshes #5772

Author: fabien-unity

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -9,6 +9,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Fixed
 - Fixed diffusion profile being reset to default on SpeedTree8 materials with subsurface scattering enabled during import.
 - Fixed error in SSGI when disabling decals (case 1365521).
+- Fixed silhouette issue with emissive decals
+- Fixed range compression factor being clamped. (case 1365707)
+- Fixed tooltip not showing on labels in ShaderGraphs (1358483).
+- Fix API warnings in Matcap mode on Metal.
+- Fix D3D validation layer errors w.r.t shadow textures when an atlas is not used.
+- Fixed screen space reflection PBR Accumulation
+- Fixed and optimize distance shadowmask fade.
+- Fixed memory leak with XR combined occlusion meshes (case 1366173).
 
 ## [10.7.0] - 2021-07-02
 

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/XR/XRSystem.cs

@@ -167,8 +167,11 @@ internal int GetMaxViews()
 
         internal void ReleaseFrame()
         {
-            foreach ((Camera _, XRPass xrPass) in framePasses)
+            for (int i = 0; i < framePasses.Count; i++)
             {
+                // Pop from the back to keep initial ordering (see implementation of ObjectPool)
+                (Camera _, XRPass xrPass) = framePasses[framePasses.Count - i - 1];
+
                 if (xrPass != emptyPass)
                     XRPass.Release(xrPass);
             }

com.unity.render-pipelines.universal/CHANGELOG.md

@@ -6,8 +6,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [10.8.0] - 2021-09-20
 
-Version Updated
-The version number for this package has increased due to a version update of a related graphics package.
+### Fixed
+- Fixed memory leak with XR combined occlusion meshes. [case 1366173]
 
 ## [10.7.0] - 2021-07-02
 

com.unity.render-pipelines.universal/Runtime/XR/XRSystem.cs

@@ -208,8 +208,11 @@ internal List<XRPass> SetupFrame(CameraData cameraData)
 
         internal void ReleaseFrame()
         {
-            foreach (XRPass xrPass in framePasses)
+            for (int i = 0; i < framePasses.Count; i++)
             {
+                // Pop from the back to keep initial ordering (see implementation of ObjectPool)
+                var xrPass = framePasses[framePasses.Count - i - 1];
+
                 if (xrPass != emptyPass)
                     XRPass.Release(xrPass);
             }